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Journals / Harran Üniversitesi Ziraat Fakültesi Dergisi / 2006 / Cilt: 10 - Sayı: 3-4

Tribolium castaneum' ların pupa ağırlığı bakımından farklı çevrelerde yapılan seleksiyonda gösterdikleri irdeleme

Response to selection for increased pupa weight in Tribolium castaneum in different environments

Seyrani KONCAGÜL
Philip J. BERGER
Pages
1–10
Publication Date
2022-10-17
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

After 23 generations of selection, heritability (h2) of pupa weight was less than the estimate in the base population, 0.21 ± 0.02, and 0.36 ± 0.02, respectively.

📌 3 Key Takeaways

🎯
Objective & Hypothesis: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.
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Key Findings & Data:This research describes 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.
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Conclusion & Impact:After 23 generations of selection, heritability (h2) of pupa weight was less than the estimate in the base population, 0.21 ± 0.02, and 0.36 ± 0.02, respectively.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

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 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 for increased pupa weight under different environmental settings, to estimate variance components and parameters across environments for the whole experiment. The data were analyzed by using a derivative-free restricted maximum likelihood (MTDFREML) procedure with a univariate animal model for estimating response to selection and parameters. Additive genetic variance remained relatively constanftnroughout the experiment. Total phenotypic variance increased across generations. Changes in phenotypic variance were attributed to changes in common environmental variance and error variance throughout the duration of the experiment. After 23 generations of selection, heritability (h2) of pupa weight was less than the estimate in the base population, 0.21 ± 0.02, and 0.36 ± 0.02, respectively.

Özet

Tribolium castaneum'larda pupa ağırlığını artırmaya yönelik tek bir kantitatif karakter bakımından seleksiyon farklı çevrelerde 23 generasyon boyunca uygulandı. Bu çalışma, üzerinde durulan karakterler bakımından başka populasyonlardaki performansları artırmak için ticari hayatta sık sık uygulanan sperm alış verişini ve çiftleştirme sistemlerini kapsayan seleksiyon düzenini tanımlamaktadır. Çalışmanın başlıca amaçları, farklı çevre şartları altında pupa ağırlığını artırmak için uygulanan seleksiyonda ilerlemeleri tahmin etmek, ve denemenin geneli için genetik parametre ve varyasyon unsurlarının tahmin edilmesidir. Veriler, seleksiyonda ilerleme ve parametreleri tahmin etmek için bireysel hayvan modeli esas alınarak MTDFREML prosedürü ile analiz edildi. Deneme süresince eklemeli genetik varyans nispi olarak değişmedi. Toplam fenotipik varyans generasyonlar boyunca arttı. Fenotipik varyanstaki artışlar, sabit çevre ve hata varyansının artmasından dolayı olduğu sonucuna varılmıştır. Yirmiüç generasyonluk seleksiyondan sonra, pupa ağırlığının kalıtım derecesi (h2=0.21±0.02) başlangıç populasyonundaki tahminden (h2=0.36±0.02) daha az olarak tahmin edilmiştir.

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Cite This Article

KONCAGÜL, S., BERGER, P. J. (2022). Tribolium castaneum' ların pupa ağırlığı bakımından farklı çevrelerde yapılan seleksiyonda gösterdikleri irdeleme. Harran Üniversitesi Ziraat Fakültesi Dergisi, Cilt: 10 - Sayı: 3-4, 1–10. https://ajindex.com/articles/534642

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