Design and outcome of genetic predictions for growth and development of tribolium castaneum across diverse environments: II. Response to selection

Tribolium castaneum'lann pupa ağırlıklarını artırmaya yönelik seleksiyon, dört farklı çevre şartlarında 23 generasyon süresince uygulanmıştır. Bu araştırma, özellikle büyükbaş hayvan sürülerindeki üretimi miktarını artırmak için sürekli olarak uygulanan çiftleştirme sistemini tanımlamaktadır. Bu çalışmanın başlıca amaçları, aynı karakterin farklı çevre şartlarında seleksiyona verdiği yanıtı, ve pupa ağırlığı bakımından muhtemel genotip x çevre interaksiyonunun miktarını ve yönünü tahmin etmektir. Dört farklı çevre şartında da eşit selekesiyon yoğunluğunun olmasına rağmen, bu çevre şartlarında tahmin edilen genetik yönelimler farklı bulunmuştur. Damızlık olarak yetiştirilecek erkek bireylerin, ileride damızlık olarak kullanılacakları muhtemel çevre şartlarına parallel çevre şartlarında yetiştirilmeleri gerektiği sonucuna varılmıştır.

Tribolium castaneum'ların büyüme ve gelişme özelliklerinin genetik unsurlarının farklı çevrelerde tahmini: II. seleksiyonda ilerleme

Selection for a single quantitative trait, increased pupa weight in Tribolium castaneum, was applied over 23 generations to enhance growth and development in four different environments. This research describes the design and outcome of a selection and mating scheme frequently occurring in commercial populations of livestock where there is an exchange of elite germplasm to enhance performance in other populations. Main objectives of the present study were to estimate the response to selection under diverse environmental settings, and to determine the magnitude and the direction of a possible genotype by environment interaction on pupa weight. Genetic responses were different among environments despite an attempt to maintain equal selection intensities across the four environments. It was concluded that males should be selected in the environment where they are expected to be used for future matings.

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