Relationships Between Genetic Parameters in the Component Traits of a Ratio Trait and the Distribution and Heritability of Such Ratio Trait

IF 1.7 3区农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Animal Science Journal Pub Date : 2025-01-22 DOI:10.1111/asj.70031

Masahiro Satoh

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Abstract

The relationships between the distribution and heritability of a ratio trait and the genetic parameters of its component traits were clarified using a Monte Carlo computer simulation. The component traits of a ratio trait were assumed to be normally distributed. The genetic parameters of the ratio trait were estimated using parent–offspring regression. As the genetic and environmental correlations ( $r_{G}$ and $r_{E}$ ) of the component traits increased, the variance, skewness, and kurtosis of the ratio trait decreased. The amount of decrease had a greater effect on $r_{E}$ than on $r_{G}$ . The estimated heritability of the ratio trait decreased as $r_{G}$ increased and as $r_{E}$ decreased. The estimated heritability of a ratio trait can be higher than the heritability of any of its component traits.

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比例性状组成性状遗传参数与比例性状分布和遗传力的关系。

利用蒙特卡罗计算机模拟，阐明了比例性状的分布和遗传力与其组成性状的遗传参数之间的关系。假设比例性状的组成性状为正态分布。利用亲代回归估计了比例性状的遗传参数。随着组成性状的遗传相关性和环境相关性（r G $$ {\mathrm{r}}_{\mathrm{G}} $$和r E $$ {\mathrm{r}}_{\mathrm{E}} $$）的增加，比例性状的方差、偏度和峰度减小。降低量对r E $$ {\mathrm{r}}_{\mathrm{E}} $$的影响大于r G $$ {\mathrm{r}}_{\mathrm{G}} $$。比值性状的估计遗传力随着r G $$ {\mathrm{r}}_{\mathrm{G}} $$的增大和r E $$ {\mathrm{r}}_{\mathrm{E}} $$的减小而降低。比率性状的估计遗传力可能高于其任何组成性状的遗传力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Animal Science Journal 生物-奶制品与动物科学

CiteScore

3.80

自引率

5.00%

发文量

111

审稿时长

1 months

期刊介绍： Animal Science Journal (a continuation of Animal Science and Technology) is the official journal of the Japanese Society of Animal Science (JSAS) and publishes Original Research Articles (full papers and rapid communications) in English in all fields of animal and poultry science: genetics and breeding, genetic engineering, reproduction, embryo manipulation, nutrition, feeds and feeding, physiology, anatomy, environment and behavior, animal products (milk, meat, eggs and their by-products) and their processing, and livestock economics. Animal Science Journal will invite Review Articles in consultations with Editors. Submission to the Journal is open to those who are interested in animal science.