Inbred corn line PHV37

According to the invention, there is provided an inbred corn line, designated PHV37. This invention thus relates to the plants and seeds of inbred corn line PHV37 and to methods for producing a corn plant produced by crossing the inbred line PHV37 with itself or with another corn plant. This invention further relates to hybrid corn seeds and plants produced by crossing the inbred line PHV37 with another corn line or plant and to crosses with related species.

FIELD OF THE INVENTION 
This invention is in the field of corn breeding, specifically relating to 
an inbred corn line designated PHV37. 
BACKGROUND OF THE INVENTION 
The goal of plant breeding is to combine in a single variety/hybrid various 
desirable traits. For field crops, these traits may include resistance to 
diseases and insects, tolerance to heat and drought, reducing the time to 
crop maturity, greater yield, and better agronomic quality. With 
mechanical harvesting of many crops, uniformity of plant characteristics 
such as germination and stand establishment, growth rate, maturity, and 
fruit size, is important. 
Field crops are bred through techniques that take advantage of the plant's 
method of pollination. A plant is self-pollinated if pollen from one 
flower is transferred to the same or another flower of the same plant. A 
plant is cross-pollinated if the pollen comes from a flower on a different 
plant. 
Plants that have been self-pollinated and selected for type for many 
generations become homozygous at almost all gene loci and produce a 
uniform population of true breeding progeny. A cross between two 
homozygous lines produce a uniform population of hybrid plants that may be 
heterozygous for many gene loci. A cross of two plants each heterozygous 
at a number of gene loci will produce a population of hybrid plants that 
differ genetically and will not be uniform. 
Corn plants (Zea mays L.) can be bred by both self-pollination and 
cross-pollination techniques. Corn has separate male and female flowers on 
the same plant, located on the tassel and the ear, respectively. Natural 
pollination occurs in corn when wind blows pollen from the tassels to the 
silks that protrude from the tops of the incipient ears. 
The development of corn hybrids requires the development of homozygous 
inbred lines, the crossing of these lines, and the evaluation of the 
crosses. Pedigree breeding and recurrent selection breeding methods are 
used to develop inbred lines from breeding populations. Breeding programs 
combine the genetic backgrounds from two or more inbred lines or various 
other broad-based sources into breeding pools from which new inbred lines 
are developed by selfing and selection of desired phenotypes. The new 
inbreds are crossed with other inbred lines and the hybrids from these 
crosses are evaluated to determine which of those have commercial 
potential. 
Pedigree breeding for single-gene traits starts with the crossing of two 
genotypes, each of which may have one or more desirable characteristics 
that is lacking in the other or which complement the other. If the two 
original parents do not provide all of the desired characteristics, other 
sources can be included in the breeding population. In the pedigree 
method, superior plants are selfed and selected in successive generations. 
In the succeeding generations the heterozygous condition gives way to 
homogeneous lines as a result of self-pollination and selection. Typically 
in the pedigree method of breeding five or more generations of selfing and 
selection is practiced: F.sub.1 .fwdarw.F.sub.2 ;F.sub.2 .fwdarw.F.sub.3 ; 
F.sub.3 .fwdarw.F.sub.4 ;F.sub.4 .fwdarw.F.sub.5, etc. 
Backcrossing can be used to improve an inbred line. Backcrossing transfers 
a specific desirable trait from one inbred or source to an inbred that 
lacks that trait. This can be accomplished for example by first crossing a 
superior inbred (A) (recurrent parent) to a donor inbred (non-recurrent 
parent), which carries the appropriate gene(s) for the trait in question. 
The progeny of this cross is then mated back to the superior recurrent 
parent (A) followed by selection in the resultant progeny for the desired 
trait to be transferred from the non-recurrent parent. After five or more 
backcross generations with selection for the desired trait, the progeny 
will be heterozygous for loci controlling the characteristic being 
transferred, but will be like the superior parent for most or almost all 
other genes. The last backcross generation would be selfed to give pure 
breeding progeny for the gene(s) being transferred. 
A single cross hybrid corn variety is the cross of two inbred lines, each 
of which has a genotype which complements the genotype of the other. The 
hybrid progeny of the first generation is designated F.sub.1. In the 
development of hybrids only the F.sub.1 hybrid plants are sought. 
Preferred F.sub.1 hybrids are more vigorous than their inbred parents. 
This hybrid vigor, or heterosis, can be manifested in many polygenic 
traits, including increased vegetative growth and increased yield. 
The development of a hybrid corn variety involves three steps: (1) the 
selection of plants from various germplasm pools; (2) the selfing of the 
selected plants for several generations to produce a series of inbred 
lines, which, although different from each other, each breed true and are 
highly uniform; and (3) crossing the selected inbred lines with unrelated 
inbred lines to produce the hybrid progeny (F.sub.1). During the 
inbreeding process in corn, the vigor of the lines decreases. Vigor is 
restored when two unrelated inbred lines are crossed to produce the hybrid 
progeny (F.sub.1). An important consequence of the homozygosity and 
homogeneity of the inbred lines is that the hybrid between any two inbreds 
will always be the same. Once the inbreds that give a superior hybrid have 
been identified, the hybrid seed can be reproduced indefinitely as long as 
the homogeneity of the inbred parents is maintained. 
A single cross hybrid is produced when two inbred lines are crossed to 
produce the F.sub.1 progeny. A double cross hybrid is produced from four 
inbred lines crossed in pairs (A.times.B and C.times.D) and then the two 
F.sub.1 hybrids are crossed again (A.times.B).times.(C.times.D). Much of 
the hybrid vigor exhibited by F.sub.1 hybrids is lost in the next 
generation (F.sub.2). Consequently, seed from hybrid varieties is not used 
for planting stock. 
Corn is an important and valuable field crop. Thus, a continuing goal of 
plant breeders is to develop high-yielding corn hybrids that are 
agronomically sound based on stable inbred lines. The reasons for this 
goal are obvious: to maximize the amount of grain produced with the inputs 
used and minimize susceptibility to environmental stresses. To accomplish 
this goal, the corn breeder must select and develop superior inbred 
parental lines for producing hybrids. This requires identification and 
selection of genetically unique individuals which in a segregating 
population occur as the result of a combination of crossover events plus 
the independent assortment of specific combinations of alleles at many 
gene loci which results in specific genotypes. Based on the number of 
segregating genes, the frequency of occurrence of an individual with a 
specific genotype is less than 1 in 10,000. Thus, even if the entire 
genotype of the parents has been characterized and the desired genotype is 
known, only a few if any individuals having the desired genotype may be 
found in a large F.sub.2 or S.sub.0 population. Typically, however, the 
genotype of neither the parents nor the desired genotype is known in any 
detail. 
SUMMARY OF THE INVENTION 
According to the invention, there is provided a novel inbred corn line, 
designated PHV37. This invention thus relates to the seeds of inbred corn 
line PHV37, to the plants of inbred corn line PHV37, and to methods for 
producing a corn plant produced by crossing the inbred line PHV37 with 
itself or another corn line. This invention further relates to hybrid corn 
seeds and plants produced by crossing the inbred line PHV37 with another 
corn line or a related species. 
DEFINITIONS 
In the description and examples that follow, a number of terms are used 
herein. In order to provide a clear and consistent understanding of the 
specification and claims, including the scope to be given such terms, the 
following definitions are provided: 
BAR PLT=BARREN PLANTS. This is the number of plants per plot that were not 
barren (lack ears). 
BRT STK=BRITTLE STALKS. This is a measure of the stalk breakage near the 
time of pollination, and is an indication of whether a hybrid or inbred 
would snap or break near the time of flowering under severe winds. Data 
are presented as percentage of plants that did not snap. 
BU ACR=YIELD (BUSHELS/ACRE). Actual yield of the grain at harvest adjusted 
to 15.5% moisture. ABS is in absolute terms and % MN is percent of the 
mean for the experiments in which the inbred or hybrid was grown. 
CLD TST=COLD TEST. This is the percentage of kernels that germinate under 
cold soil conditions. ABS=absolute measurement and % MN is percentage of 
mean of the experiments in which inbred or hybrid was grown. 
COB SC=COB SCORE. The cob score is a rating of how well the grain is 
shelled off the cob and how badly the cob is broken up going through the 
combine. This is given as a 1 to 9 score with 9 being very good. A high 
score indicates that the grain shells off of the cob well, and the cob 
does not break. 
DRP EAR=DROPPED EARS. This is a measure of the number of dropped ears per 
plot and represents the percentage of plants that did not drop ears prior 
to harvest. 
EAR HT=EAR HEIGHT. The ear height is a measure from the ground to the top 
developed ear node attachment and is measured in inches. 
EAR SZ=EAR SIZE. A 1 to 9 visual rating of ear size. The higher the rating 
the larger the ear size. 
EST CNT=EARLY STAND COUNT. This is a measure of the stand establishment in 
the spring and represents the number of plants that emerge on a per plot 
basis for the inbred or hybrid. 
GDU SHD=GDU TO SHED. The number of growing degree units (GDUs) or heat 
units required for an inbred line or hybrid to have approximately 50 
percent of the plants shedding pollen and is measured from the time of 
planting. Growing degree units are calculated by the Barger Method, where 
the heat units for a 24-hour period are: 
##EQU1## 
The highest maximum temperature used is 86.degree. F. and the lowest 
minimum temperature used is 50.degree. F. For each inbred or hybrid it 
takes a certain number of GDUs to reach various stages of plant 
development. 
GDU SLK=GDU TO SILK. The number of growing degree units required for an 
inbred line or hybrid to have approximately 50 percent of the plants with 
silk emergence from time of planting. Growing degree units are calculated 
by the Barger Method as given in GDU SHD definition. 
GRN QUL=GRAIN QUALITY. This is a 1 to 9 rating for the general quality of 
the shelled grain as it is harvested based on such factors as the color of 
the harvested grain, any mold on the grain, and any cracked grain. High 
scores indicate good grain quality. 
KER LB=KERNELS PER POUND. This is the number of kernels per 0.1 pound. 
KSZ L=KERNEL SIZE LARGE. Percentage by weight of shelled corn that passes 
through a screen with 25/64 inch diameter openings but does not pass 
through a screen with 22/64 inch diameter openings. 
KSZ MF=KERNEL SIZE MEDIUM FLAT. Percentage by weight of shelled corn that 
passes through a screen with 22/64 inch diameter openings and a screen 
with 13/64 inch wide slot screen but does not pass through a screen with 
18.5/64 inch diameter openings. 
KSZ MR=KERNEL SIZE MEDIUM ROUND. Percentage by weight of shelled corn that 
passes through a screen with 22/64 inch diameter openings but does not 
pass through a 13/64 inch wide slot screen or a screen with 18.5/64 inch 
diameter openings. 
KSZ S=KERNEL SIZE SMALL. Percentage by weight of shelled corn that through 
with 18 /64 inch diameter openings ut does not pass through a screen with 
16/64 inch diameter openings. 
KSZ TIP=KERNEL SIZE TIPS. Percentage by weight of shelled corn that passes 
through a screen with 16/64 inch diameter openings. 
KSZ XL=KERNEL SIZE EXTRA LARGE. Percentage by weight of shelled corn that 
does not pass through a screen with 25/64 inch diameter openings. 
MST=HARVEST MOISTURE. The moisture is the actual percentage moisture of the 
grain at harvest. 
PLT HT=PLANT HEIGHT. This is a measure of the height of the plant from the 
ground to the tip of the tassel in inches. 
POL WT=POLLEN WEIGHT. This is the weight of pollen per 100 plants taken on 
a plot basis. ABS refers to data in absolute, and % MN refers to data 
presented as percentage of experimental mean. 
PRM=PREDICTED RM. This trait, predicted relative maturity (RM), is based on 
the harvest moisture of the grain. The relative maturity rating is based 
on a known set of checks and utilizes standard linear regression analyses 
and is referred to as the Minnesota Relative Maturity Rating System. 
RT LDG=ROOT LODGING. Root lodging is the percentage of plants that do not 
root lodge; plants that lean from the vertical axis at an approximately 
30.degree. angle or greater would be counted as root lodged. 
SCT GRN=SCATTER GRAIN. A 1 to 9 visual rating indicating the amount of 
scatter grain (lack of pollination or kernel abortion) on the ear. The 
higher the score the less scatter grain. 
SDG VGR=SEEDLING VIGOR. This is the visual rating (1 to 9) of the amount of 
vegetative growth after emergence at the seedling stage (approximately 
five leaves). A higher score indicates better vigor. 
SEL IND=SELECTION INDEX. The selection index gives a single measure of the 
hybrid's worth based on information for up to five traits. A corn breeder 
may utilize his or her own set of traits for the selection index. One of 
the traits that is almost always included is yield. The selection index 
data presented in the tables represent the mean value averaged across 
testing stations. 
STA GRN=STAY GREEN. Stay green is the measure of plant health near the time 
of black layer formation (physiological maturity). A high score indicates 
better late-season plant health. 
STK CNT=NUMBER OF PLANTS. This is the final stand or number of plants per 
plot. 
STK LDG=STALK LODGING. This is the percentage of plants that did not stalk 
lodge (stalk breakage) as measured by either natural lodging or pushing 
the stalks and determining the percentage of plants that break below the 
ear. 
TAS BLS=TASSEL BLAST. A 1 to 9 visual rating was used to measure the degree 
of blasting (necrosis due to heat stress) of the tassel at time of 
flowering. A 1 would indicate a very high level of blasting at time of 
flowering, while a 9 would have no tassel blasting. 
TAS SZ=TASSEL SIZE. A 1 to 9 visual rating was used to indicate the 
relative size of the tassel. The higher the rating the larger the tassel. 
TAS WT=TASSEL WEIGHT. This is the average weight of a tassel (grams) just 
prior to pollen shed. 
TEX EAR=EAR TEXTURE. A 1 to 9 visual rating was used to indicate the 
relative hardness (smoothness of crown) of mature grain. A 1 would be, 
very soft (extreme dent) while a 9 would be very hard (flinty or very 
smooth crown). 
TILLER=TILLERS. A count of the number of tillers per plot that could 
possibly shed pollen was taken. Data is given as percentage of tillers: 
number of tillers per plot divided by number of plants per plot. 
TST WT=TEST WEIGHT UNADJUSTED. The measure of the weight of the grain in 
pounds for a given volume (bushel). 
TST WTA=TEST WEIGHT ADJUSTED. The measure of the weight of the grain in 
pounds for a given volume (bushel) adjusted for percent moisture. 
YLD=YIELD. It is the same as BU ACR ABS. 
YLD SC=YIELD SCORE. A 1 to 9 visual rating was used to give a relative 
rating for yield based on plot ear piles. The higher the rating the 
greater visual yield appearance. 
CLN=Corn Lethal Necrosis (MCMVMaize Chlorotic Mottle Virus and MDMV=Maize 
Dwarf Mosaic Virus): Visual rating (1-9 score) where a "1" is very 
susceptible and a "9" is very resistant. 
MDM CPX=Maize Dwarf Mosaic Complex (MDMV=Maize Dwarf Mosaic Virus and 
MCDV=Maize Chlorotic Dwarf Virus): Visual rating (1-9 score) where a "1" 
is very susceptible and a "9" is very resistant. 
COM SMT=Common Smut (Ustilago maydis): Percentage of plants that did not 
have infection. 
ANT ROT=Anthracnose Stalk Rot (Colletotrichum graminicola): Visual rating 
(1-9 score) where a "1" is very susceptible and a "9" is very resistant. 
SLF BLT=Southern Leaf Blight (Bipolaris maydis, Helminthosporium maydis): 
Visual rating (1-9 score) where a "1" is very susceptible and "9" is very 
resistant. 
NLF BLT=Northern Leaf Blight (Exserohilum turcicum, H. turcicum): Visual 
rating (1-9 score) where a "1" is very susceptible and a "9" is very 
resistant. 
HC BLT=Helminthosporium Carbonum Leaf Blight (Bipolariszeicola, H. 
carbonum): Visual rating (1-9 score) where a "1" is very susceptible and a 
"9" is very resistant. 
COM RST=Common Rust (Puccinia sorghi): Visual rating (1-9 score) where a 
"1" is very susceptible and a "9" is very resistant. 
SO RST=Southern Rust (Puccinia polysora): Visual rating (1-9 score) where a 
"1" is very susceptible and a "9" is very resistant. 
EYE SPT=Eyespot (Kabatiella zeae): Visual rating (1-9 score) where a "1" is 
very susceptible and a "9" is very resistant. 
GLF SPT=Gray Leaf Spot (Cercospora zeae-maydis): Visual rating (1-9 score) 
where a "1" is very susceptible and a "9" is very resistant. 
STW WLT=Stewart's Wilt (Erwinia stewartii): Visual rating (1-9 score) where 
a "1" is very susceptible and a "9" is very resistant. 
GOS WLT=Goss's Wilt (Corynebacterium nebraskense): Visual rating (1-9 
score) where a "1" is very susceptible and a "9" is very resistant. 
HD SMT=Head Smut (Spacelotheca reiliana): Percentage of plants that did not 
have infection. 
DNY MIL=Downy Mildew (Peronosclerospora sorghi): Percentage of plants that 
did not have infection. 
FUS EAR=Fusarium Ear Mold (Fusarium moniliforme): Percentage of plants that 
did not have infection. 
EAR MLD=General Ear Mold: Visual rating (1-9 score) where a "1" is very 
susceptible and a "9" is very resistant. This is based on overall rating 
for ear mold of without determining specific mold organism, and may not be 
predictive for a specific ear mold. 
ECB DPE=Dropped ears due to European Corn Borer (Ostrinia nubilalis): 
Percentage of plants that did not drop ears under second brood corn borer 
infestation. 
ECB 2SC=European Corn Borer Second Brood (Ostrinia nubilalis): Visual 
rating (1-9 score) of post flowering damage due to infestation by European 
Corn Borer. A "1" is very susceptible and a "9" is very resistant. 
ECB 1LF=European Corn Borer First Brood (Ostrinia nubilalis): Visual rating 
(1-9 score) of pre-flowering leaf feeding by European Corn Borer. A "1" is 
very susceptible and a "9" is very resistant. 
ECB 2IT=European Corn Borer Second Brood Tunneling (Ostrinia nubilalis): 
The average inches of tunneling in the stalk due to second brood 
(post-flowering) European Corn Borer infestation. Determined by splitting 
stalks with a knife, from four internodes above the ear to the ground. 
DETAILED DESCRIPTION OF THE INVENTION 
Inbred Corn Line PHV37 is a yellow, dent corn inbred with superior 
characteristics and provides an excellent female parental line in crosses 
for producing first generation F.sub.1 corn hybrids. This inbred is best 
adapted over the Northern region of the United States. The inbred can be 
used to produce hybrids from approximately 100-115 relative maturity based 
on the Minnesota Relative Maturity Rating System for harvest moisture of 
grain. PHV37 is a very acceptable female parent because of its high 
yields, acceptable sizing and good cold test scores. It is not acceptable 
for use as a male parent because of marginal pollen shed. PHV37 was only 
47% of the experimental mean for amount of pollen in the pollen yield test 
averaged over 5 locations. 
The inbred has shown uniformity and stability within the limits of 
environmental influence for all the traits as described in the Variety 
Description Information (Table 1) that follows. Most of the data in the 
Variety Description Information was collected at Johnston, Iowa. The 
inbred has been self-pollinated and ear-rowed a sufficient number of 
generations with careful attention paid to uniformity of plant type to 
ensure homozygosity and phenotypic stability. The line has been increased 
both by hand and in isolated fields with continued observations for 
uniformity. No variant traits have been observed or are expected in PHV37. 
Inbred corn line PHV37, being substantially homozygous, can be reproduced 
by planting seeds of the line, growing the resulting corn plants under 
self-pollinating or sib-pollinating conditions with adequate isolation, 
and harvesting the resulting seed, using techniques familiar to the 
agricultural arts. 
TABLE 1 
______________________________________ 
PHV37 
VARIETY DESCRIPTION INFORMATION 
______________________________________ 
Type: Dent Region Best Adapted: North 
A. Maturity: Averaged across Northern maturity zone. 
Zone: 2 
INBRED = PHV37 
Heat Unit Shed: 1410 
Heat Unit Silk: 1440 
No. Reps: 30 
##STR1## 
*If maximum is greater than 86 degrees fahrenheit, then 86 is used and if 
minimum is less than 50, then 50 is used. Heat units accumulated daily an 
can not be less than 0. 
B. Plant Characteristics: 
Plant height (to tassel tip): 214 cm 
Length of top ear internode: 13 cm 
Number of ears per stalk: Single 
Ear height (to base of top ear): 71 cm 
Number of tillers: None 
Cytoplasm type: Normal 
C. Leaf: 
Color: (B14) Dark green 
Angle from Stalk: 30-60 degrees 
Marginal Waves: (OH7L) Many 
Number of Leaves (mature plants): 19 
Sheath Pubescence: (W22) Light 
Longitudinal Creases: (1) Many 
Length (Ear node leaf): 76 cm 
Width (widest point, ear node leaf): 8 cm 
D. Tassel: 
Number lateral branches: 5 
Branch Angle from central spike: &lt;30 degrees 
Pollen Shed: Light based on pollen Yield Test 
(47% of experiment mean). 
Peduncle Length (top leaf to basal branches): 22 cm 
Anther Color: Yellow with slight pink 
Glume Color: Green 
E. Ear (Husked Ear Data Except When Stated Otherwise): 
Length: 14 cm 
Weight: 105 gm 
Mid-point Diameter: 43 mm 
Silk Color: Green 
Husk Extension (Harvest stage): Very Long (&gt;10 cm) 
Husk Leaf: Long (&gt;15 cm) 
Taper of Ear: Slight taper 
Position of Shank (dry husks): Horizontal 
Kernel Rows: Distinct, slightly curved, Number = 16 
Husk Color (fresh): Light green 
Husk Color (dry): Buff 
Shank Length: 12 cm 
Shank (No. of internodes): 9 
F. Kernel (Dried): 
Size (from ear mid-point) 
Length: 11 mm 
Width: 9 mm 
Thick: 5 mm 
Shape Grade (% rounds): 20-40% medium rounds based on 
Parent Test. 
Pericarp Color: Colorless 
Aleurone Color: Homozygous yellow 
Endosperm Color: Yellow 
Endosperm Type: Normal 
Gm Wt/100 Seeds (unsized): 30 gm 
G. Cob: 
Diameter at mid-point: 26 mm 
Strength: Strong 
Color: Red 
H. Diseases: 
Corn Lethal Necrosis (MCMV = Maize Chlorotic Mottle 
Virus and MDMV = Maize Dwarf Mosaic Virus): Resistant 
Anthracnose Stalk Rot (C. Graminicola): Intermediate 
N. Leaf Blight (H. Turcicum): Intermediate 
Carbonum Leaf Blight (H. Carbonum): Susceptible 
Common Rust (P. Sorghi): Susceptible 
Eye Spot (K. Zeae): Intermediate 
Gray Leaf Spot (C. Zeae): Intermediate 
Stewarts Wilt (E. Stewartii): Resistant 
Goss's Wilt (C. Nebraskense): Resistant 
Common Smut (U. Maydis): Intermediate 
Head Smut (S. Reiliana): Resistant 
Fusarium Ear Mold (F. Moniliforme): Intermediate 
I. Insects: 
European Corn Borer-1 Leaf Damage (Pre-flowering): 
Intermediate 
European Corn Borer-2 (Post-flowering): Intermediate 
J. Variety Most Closely Resembling: 
Character Inbred 
Maturity B09 
Usage PHK29 
______________________________________ 
BO9 (PVP Certificate No. 8300142) and PHK29 (PVP Certificate No. 8700214 
and U.S. Pat. No. 4,812,600) are Pioneer proprietary inbreds. BO9 is 
quickly declining in usage but is of similar maturity. 
Data for items B, C, D, E, F, and G are primarily based on a maximum of 
three reps of data from Johnston, Iowa in 1987 and 1988, plus description 
information from the maintaining station. 
TABLE 2 
______________________________________ 
ELECTROPHORESIS RESULTS 
Isozyme Genotypes for PHV37 
Isozyme data was generated for inbred corn line PHV37 
according to the procedure described in Goodman, M. M. and 
Stuber, C. M., "Genetic identification of lines and crosses 
using isoenzyme electrophoresis," Proceedings of the Thirty- 
Fifth Annual Corn and Sorghum Industry Research Conference, 
Chicago, Illinois (1980). 
Alleles Present 
Loci PHV37 
______________________________________ 
ACP1 4 
ADH1 4 
CAT3 9 
DIA1 8 
GOT1 4 
GOT2 4 
GOT3 4 
IDH1 4 
IDH2 6 
MDH1 6 
MDH2 6 
MDH3 16 
MDH4 12 
MDH5 12 
MMM 4 
PGM1 9 
PGM2 4 
PGD1 2 
PGD2 5 
PHI1 4 
______________________________________ 
INDUSTRIAL APPLICABILITY 
This invention also is directed to methods for producing a corn plant by 
crossing a first parent corn plant with a second parent corn plant wherein 
the first or second parent corn plant is an inbred corn plant from the 
line PHV37. Further, both first and second parent corn plants can come 
from the inbred corn line PHV37. Thus, any such methods using the inbred 
corn line PHV37 are part of this invention: selfing, backcrosses, hybrid 
production, crosses to populations, and the like. All plants produced 
using inbred corn line PHV37 as a parent are within the scope of this 
invention. Advantageously, the inbred corn line is used in crosses with 
other, different, corn inbreds to produce first generation (F.sub.1) corn 
hybrid seeds and plants with superior characteristics. 
As used herein, the terms "plant and plant parts" include plant cells, 
plant protoplasts, plant cell tissue culture from which corn plants can be 
regenerated, plant calli, plant clumps, and plant cells that are intact in 
plants or parts of plants, such as embryos, pollen, flowers, kernels, 
ears, cobs, leaves, husks, stalks, roots, root tips, anthers, silk and the 
like. 
Tissue culture of corn is described in European Patent Application, 
publication 160,390, incorporated herein by reference. Corn tissue culture 
procedures are also described in Green and Rhodes, "Plant Regeneration in 
Tissue Culture of Maize," Maize for Biological Research (Plant Molecular 
Biology Association, Charlottsville, Va. 1982, at 36-372. Thus, another 
aspect of this invention is to provide cells which upon growth and 
differentiation produce the inbred line PHV37. 
The utility of inbred line PHV37 also extends to crosses with other 
species. Commonly, suitable species will be of the family Graminaceae, and 
especially of the genera Zea, Tripsacum, Coix, Schlerachne, Polytoca, 
Chionachne, and Trilobachne, of the tribe Maydeae. Of these, Zea and 
Tripsacum, are most preferred. Potentially suitable for crosses with PHV37 
may be the various varieties of grain sorghum, Sorghum bicolor (L.) 
Moench. 
Corn is used as human food, livestock feed, and as raw material in 
industry. The food uses of corn, in addition to human consumption of corn 
kernels, include both products of dry- and wet-milling industries and 
alkaline cooking. The principal products of corn dry milling are grits, 
meal and flour. The corn wet-milling industry can provide corn starch, 
corn syrups, and dextrose for food use. Alkaline cooking provides snack 
foods (i.e., corn chips, tortillas, etc.) Corn oil is recovered from corn 
germ, which is a by-product of both dry- and wet-milling industries. 
Corn, including both grain and non-grain portions of the plant, is also 
used extensively as livestock feed, primarily for beef cattle, dairy 
cattle, hogs, and poultry. 
Industrial uses of corn are mainly from corn starch from the wet-milling 
industry and corn flour from the dry-milling industry. The industrial 
applications of corn starch and flour are based on functional properties, 
such as viscosity, film formation, adhesive properties, and ability to 
suspend particles. The corn starch and flour have application in the paper 
and textile industries. Other industrial uses include applications in 
adhesives, building materials, foundry binders, laundry starches, 
explosives, oil-well muds, and other mining applications. 
Plant parts other than the grain of corn are also used in industry. Stalks 
and husks are made into paper and wallboard and cobs are used for fuel and 
to make charcoal. 
The seed of inbred corn line PHV37, the plant produced from the inbred 
seed, the hybrid corn plant produced from the crossing of the inbred, 
hybrid seed, and various parts of the hybrid corn plant can be utilized 
for human food, livestock feed, and as a raw material in industry.