Protein Polymorphisms in the Quail Lines Selected for Large and Small Body Weight.

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Protein polymorphisms were screened for 10 polymorphic loci in two lines of Japanese quail, selected for high (LL) and low (SS) body weight respectively, during 57 generations, and a random bred control line (RR). The Hb-1 locus of the 10 loci was fixed in Hb-1B gene in all lines. The gene frequency of Es-DF was high in LL and low in SS. In the 6-PGD locus, although LL and RR lines showed the highest frequency in 6-PGDC, SS line was the highest (0.60) in 6-PGDD. The 6-PGDA allele was absent in SS line. The average heterozygosities based on 9 polymorphic loci of the LL, RR and SS lines were 0.410, 0.454 and 0.417, respectively. Inbreeding coefficient of LL and SS lines calculated as the degree of heterozygosity loss to RR line were 9.7% and 8.1%, respectively. The value of subdivision index (GST) was estimated 0.018. The genetic distance value between RR and LL and between RR and SS were about 0.012 and 0.020, respectively. Although differentiation of allele frequencies among lines was found at the Es-D and 6-PGD loci, the data of inbreeding coefficient, subdivision index and genetic distance indicate that the degree of differentiation among the LL, RR and SS lines is small.
日本家禽学会の論文