Determination of Heritability and Genotypic-Phenotypic Correlations According to Yield Traits in Japanese Quails

Year 2023, , 465 - 472, 25.04.2023

Ufuk Karadavut

https://doi.org/10.30910/turkjans.1223293

Abstract

The animal material of the study consisted of quails of similar live weight selected from a randomly mated 14-week-old flock. Selected 29 male and 29 female quails were placed in individual cages with a ratio of 1-1 male females. The chicks obtained from this flock were fed ad libitum with 24% crude protein and 2900 kcal/kg metabolic energy from hatching to the sixth week of the experiment. The sexes of those who completed their development up to three weeks in growth cages by marking were determined and placed in special cages one by one according to their genders. In the study, 86 quails belonging to each family, including 3 siblings, were used. At the end of the trial, the survivability decreased to 75.58%. When considered as the sum of Male+Female, it is seen that the average of the starting weight is 8.776 g, the final weight measurement is 176.16 g and the average weight is 86.47 g. While this average weight is 85.06 g in females, it increases to 87.43 in males. Considering the average heritability, it was clearly separated from the others with a heritability value of 0.586 and this was found to be statistically significant (P<0.05). While the heritability for males was 0.428, it was found to be 0.269 for the total herd. It is seen that the genetic variation for Male, Female and Male+Female was significantly higher in the first generation but decreased with the second generation. It is seen that genetic variation is significantly higher in the first generation for Male, Female and Male+Female, but decreases with the second generation . When we look at the additive genetic change, it is seen that there is a similar change. As seen in this study, it is necessary to pay attention to the changes in breeding activities, especially in the weeks when the genotypic correlations are high.

Keywords

Quail, Heritability, Genetic correlations, Yield

Supporting Institution

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Project Number

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Japon Bıldırcınlarında Verim Özelliklerine Göre Kalıtım Derecesi ile Genotipik ve Fenotipik Korelasyonların Belirlenmesi

Abstract

Çalışmanın hayvan materyalini rastgele çiftleştirilen 14 haftalık sürüden seçilen benzer canlı ağırlıktaki bıldırcınlar oluşturmuştur. Seçilen 29 erkek 29 dişi bıldırcın bireysel kafeslere 1-1 erkek dişi oranı ile yerleştirilmişlerdir. Bu sürüden elde edilen civcivler çıkımdan deneme sonu olan altıncı haftaya kadar %24 ham protein ve 2900 kcal/ kg metabolik enerji içeren yemle ad libitum olarak beslenmişlerdir. İşaretlenerek büyüme kafeslerinde üç haftaya kadar gelişmelerini tamamlayanların cinsiyetleri belirlenmiş ve cinsiyetlerine göre özel kafeslere tek tek konulmuşlardır. Çalışmada her aileye ait 3 öz kardeş olmak üzere 86 bıldırcın kullanılmıştır. Deneme sonunda yaşama gücü %75,58’e kadar düşmüştür. Erkek+Dişi toplamı olarak bakıldığında çıkış ağırlığının ortalamasının 8,776 g, son ağırlık ölçümünün ise 176,16 g ve ortalama ağırlığın ise 86,47 g olduğu görülmektedir. Bu ortalama ağırlık dişilerde 85,06 g iken erkeklerde 87,43’e çıkmaktadır. Ortalama kalıtım derecelerine bakıldığında Dişilere ait 0,586 kalıtım derecesi değeri ile Erkek ve Erkek+Dişi’lere ait kalıtım derecelerinden belirgin şekilde ayrılmış ve bu istatistiksel olarak önemli bulunmuştur (P<0,05). Erkeklerde kalıtım derecesi 0,428 olurken, sürü toplamında 0,269 olarak belirlenmiştir. Genetik değişimin Erkek, Dişi ve Erkek+Dişi için ilk generasyonda belirgin şekilde yüksek olduğu ancak ikinci generasyonla birlikte düşüş gösterdiği görülmektedir. Genetik değişimin Erkek, Dişi ve Erkek+Dişi için ilk generasyonda belirgin şekilde yüksek olduğu ancak ikinci generasyonla birlikte düşüş gösterdiği görülmektedir. Eklemeli genetik değişime bakıldığında ise benzer değişimin olduğu görülmektedir. Yapılan bu çalışmada da görüldüğü üzere ıslah faaliyetlerinde özellikle genotipik korelasyonların yüksek çıktığı haftalardaki değişimlere dikkat edilmesi gerekmektedir.

Keywords

Bıldırcın, Kalıtım Derecesi, Genetik Korelasyonlar, Verim.

Project Number

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