Japon bıldırcınlarında canlı ağırlığa göre uygulanan farklı seleksiyon yöntemlerinin bazı genetik parametrelere etkisini araştırmak için yapılan araştırmada, M55 hattında 5. hafta canlı ağırlığa göre bireysel seleksiyon, R33 ve S55 hatlarında ise karşılıklı seleksiyon (RRS) uygulanmıştır. Seleksiyon 2 generasyon yürütülmüştür. M55 hattında canlı ağırlıkta birinci ve ikinci generasyonda %2.19 ve %6.29’luk pozitif yönde sapma olmuş, R3S5 ve R3S5 melez hatlarında ise birinci generasyonda sırayla %3.22 ve %1.95’lik, ikinci generasyonda ise %6.50 ve %7.31’lik heterosis belirlemişlerdir. Beşinci haftada canlı ağırlığın kalıtım derecesi 1. ve 2. generasyonda M55 hattında sırayla 0.27, 0.73; R3S5 hattında 0.37, 0.19 ve R3S5 hattında 0.17, 0.27 olarak belirlenmiştir.
The aim of this study was to investigate the effects on some genetic parameters of different selection methods for Body Weight (BW) in Japanese quail. For this aim, line M(55) was subjected to individual selection for 5 weeks BW while a reciprocal recurrent selection method was applied to lines R(33) and S(55) Selection lasted 2 generations. In individual lines, the percentage deviation of body weight was an average of 1.41, 1.73 and 2.19% in the 1st generation males, females and mixed sex, respectively. These parameters reached 5.57, 7.44 and 6.29% in the 2nd generation. In the reciprocal recurrent selection, heterosis of BW in the crossbred birds occurred in the positive direction and was 3.22 and 1.95% for R(3)S(5) and S(5)R(3), respectively in the 1st generation. In the 2nd generation, heterosis was calculated as 6.50 and 7.31% in R(3)S(5) and S(5)R(3), respectively, higher than the 1st generation. At the end of the 2 generations, R(3)S(5) had higher heterosis than S(5)R(3) BW increase was similar in the 2 selection methods. Heritability of BW in the individual lines was 0.27 and 0.73 in the 1st and 2nd generation, respectively. In the reciprocal selection, heritability of BW was estimated as 0.37 and 0.19 in the 1st generation and 0.17 and 0.27 in the 2nd generation for R(3)S(5) and S(5)R(3), respectively. As a result, at the end of the 2 generations of selection, an improvement in BW increase was obtained in both selection methods. If selection is continued in these lines, this may be important especially with regards BW.