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Title:   Author  item
                                            McCarty, Jackitem
                                            Jenkins, Johnieitem
                                            Gutierrez, Osmanitem
                                            Hayes, Russell

                                                         - *Russ*
  Submitted to: Journal of Plant Registrations
                                    Publication Type: Peer Reviewed Journal
                                    Publication Acceptance Date: 4/4/2014
                                    Publication  Date: 8/1/2014
                                    Publication URL: https://handle.nal.usda.gov/10113/59550Citation: McCarty Jr., J.C., Jenkins, J.N., Gutierrez, O.A., Hayes, R.W. 2014. Registration of RMPAP-C4, a random-mated primitive race accession cotton germplasm population. Journal of Plant Registrations. 8:313-317.Interpretive Summary: A random mated population involving four cultivars of cotton, and thirty day-neutral primitive accessions, RMPAP-C4, was developed and jointly released by USDA-ARS and the Mississippi Agricultural and Forestry Experiment Station.  Five cycles of random-mating followed the crossing of 30 day-neutral primitive accessions to four conventional cultivars ‘Sure-Grow 105’, ‘DP 393’, ‘FM 458’, and ‘ST 474’.  Random mating was facilitated by hand emasculation and bulk pollen methodology.  The aim of this project was to incorporate alleles from day-neutral primitive accessions into a population useful to cotton breeding programs for trait improvement and genetic diversity.  Agronomic traits measured following five cycles of random mating were not different from those of cultivars, except for lint percent which was lower.  Small changes occurred for fiber quality traits, except for fiber uniformity which increased following random mating.  Morphological trait diversity is also present in this population.  This unique population should offer new genetic combinations and genetic diversity that may be useful to Upland cotton breeding programs.
                                Technical Abstract: A random mated population involving four cultivars of Upland cotton, Gossypium hirsutum L., and thirty day-neutral primitive accessions, RMPAP-C4, was developed and jointly released by USDA-ARS and the Mississippi Agricultural and Forestry Experiment Station in 2014.  This population involved five cycles of random-mating following the cross of 30 day-neutral primitive accessions to the conventional cultivars ‘Sure-Grow 105’, ‘DP 393’, ‘FM 458’, and ‘ST 474’.  Random mating was facilitated by hand emasculation and bulk pollen methodology.  The aim of this project was to incorporate alleles from day-neutral primitive accessions into a population useful to cotton breeding programs for trait improvement and genetic diversity.  The mean values for agronomic traits measured following five cycles of random mating were not significantly different from those of cultivars, except for lint percent which was lower.  Small non-significant changes occurred for fiber quality traits, except for fiber uniformity which increased following random mating.  Morphological trait diversity is also present in this population.  This unique population should offer new genetic combinations and genetic diversity that may be useful to Upland cotton breeding programs.


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