Judul: Heritabilitas dan Respon Seleksi Famili Ikan Nila (Oreochromis niloticus Blkr.) di Balai Besar Pengembangan Budidaya Air Tawar (BBPBAT) Sukabumi
Abstrak: The degradation of genetic quality of tilapia it might be related to the high inbreeding coefficient in the population. In order to reduce the rate of this degradation, selective breeding program should be done. The selection progress is mainly depending on the population variation of the trait studied and their heritability values. One of the main selection techniques that can be applied for the tilapia is within family selection. This selection method has been applied at the Main Center for Freshwater Aquaculture Development (MCFAD), Sukabumi, West Java, and already produced two generation of tilapia from combination of 10 strains. The aims of this study are to estimate the heritability values of some highly economic traits and to estimate the selection progresses. The selective individuals or strains then will be used for the commercial stocks. The results shows that the average estimated heritability values of body weight of male and female were 0,314 and 0,285, respectively. The estimated heritability values of body length were 0,362 and 0,318, respectively. In general, the estimated heritability values of head length, body height and body width was greater than 0,4.The percentage of heterosis of body weight was 21,76%. Meanwhile the heterosis of body length, head length, body height and body width were 3,58, 3,56, 4,45, and 1,62%.The selection progress for body weight per generation was 26,20 – 27,56%. On the order hand, the selection progress for body length was 6,94 – 7,73%, for head length 3,55 – 4,91%, for body height was 4,61 – 7,00%, and for body width was 5,70 – 5,84%.
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Judul: Keragaan ikan nila BEST Oreochromis niloticus hasil seleksi di karamba jaring apung Danau Lido, Bogor
Abstrak: The strain BEST (Bogor Enhanced Strain Tilapia) is a new strain of tilapia developed from the sixth generation of GIFT (Genetic Improvement of Farmed Tilapia). Genetic environmental test of BEST has been done in various environment, one of them is in Lido lake. The objective of this research is to evaluate some commercial parameters (growth, SR, etc.) 9 families of BEST in experimental floating net cages. This research was conducted using 27 days-old fry, feeding with 10% of biomass daily for 60 days. Every family reared in floating net cage with density of 60 fish/m3. Observation data of weight, length and survival rate (SR) were collected every 10 days by sampling 50 fish from each family. The result showed that, the family 9 gave the highest growth rate. The family 9 had the highest daily growth rate, both in term of weight and length. Family 7 has varied in parameter observed value. The family 3 provided the highest SR and biomass. The results of this research shown that the population of family 3 had the highest production level. The study is also showed that the real heritability value is 0.009. This study recommend that the family 3 could be use as the candidate in the further selective breeding program.
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Judul: Pelabelan Super Vertex Magic
Abstrak: Super vertex magic labeling is labeling on graph with is a set of edges mapped into and is a set of vertices mapped into . It has a vertex magic labeling in which and represents the size and order of the graph respectively. This manuscript proves that paths, cyclics, and disjoint union of cyclics have a super vertex magic labeling. There are four theorems to be discussed. The first theorem proves that path is super vertex magic if and only if is odd and . The second theorem proves that cyclic is super vertex magic if and only if is odd. The third theorem proves that bijection function from an edge set onto of graph can be extended to a super vertex magic labeling if and only if the set amount of edge label that incidents with a vertex in the graph, consists of sequential integers as many as vertices in the graph. The fourth theorem proves that disjoint union of the cyclics consists of cyclics with each cyclic has vertices is super vertex magic if and only if and are odd.
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