Divergent selection for fat index in Pannon Ka rabbits: genetic parameters, selection response

IF 0.8 4区农林科学 Q3 AGRICULTURE, DAIRY & ANIMAL SCIENCE

World Rabbit Science Pub Date : 2020-09-30 DOI:10.4995/WRS.2020.12733

R. Kasza, Z. Matics, Z. Gerencsér, T. Donkó, I. Radnai, Z. Szendrő, I. Nagy

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引用次数: 1

Abstract

The objective of this study was to estimate the response to selection for total body fat content of rabbits measured by computer tomography (CT). A divergent selection experiment was performed using Pannon Ka rabbits, which were previously selected for number of kits born alive. The so-called zero generation consisted of 351 Pannon Ka rabbits, from which the index, total body fat volume (cm 3 ) divided by the body weight (kg), was measured. Rabbits with low and high fat index values were selected to form the parent groups of the lean and fat lines, respectively. The lines consisted of 55-72 females and 35-47 males, depending on the line and generation. After three generations, the rabbits were evaluated by means of a single trait animal model. The fat index showed a moderate heritability estimate (0.28±0.03). The magnitude of the common litter effect was small (0.10±0.02). The breeding values averaged per generation provided slightly asymmetrical responses. Based on the results, the divergent selection was successful in confirming that CT is a very suitable method for performing selection for body composition traits.

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Pannon-Ka兔脂肪指数的差异选择：遗传参数、选择反应

本研究的目的是评估通过计算机断层扫描（CT）测量的兔全身脂肪含量对选择的反应。使用Pannon-Ka兔子进行了一项不同的选择实验，这些兔子之前被选为活产试剂盒的数量。所谓的零代由351只潘农卡兔组成，从中测量指标，即全身脂肪体积（cm3）除以体重（kg）。选择具有低脂肪指数值和高脂肪指数值的兔子分别形成瘦系和胖系的亲本组。根据品系和世代的不同，品系由55-72只雌性和35-47只雄性组成。三代后，通过单一特征动物模型对兔子进行评估。脂肪指数显示出中等的遗传力估计值（0.28±0.03）。常见窝仔数效应的大小很小（0.10±0.02）。平均每代的育种值提供了轻微的不对称反应。基于这些结果，差异选择成功地证实了CT是一种非常适合进行身体成分性状选择的方法。

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

World Rabbit Science 农林科学-奶制品与动物科学

CiteScore

1.70

自引率

25.00%

发文量

审稿时长

>36 weeks

期刊介绍： World Rabbit Science is the official journal of the World Rabbit Science Association (WRSA). One of the main objectives of the WRSA is to encourage communication and collaboration among individuals and organisations associated with rabbit production and rabbit science in general. Subject areas include breeding, genetics, production, management, environment, health, nutrition, physiology, reproduction, behaviour, welfare, immunology, molecular biology, metabolism, processing and products. World Rabbit Science is the only international peer-reviewed journal included in the ISI Thomson list dedicated to publish original research in the field of rabbit science. Papers or reviews of the literature submitted to World Rabbit Science must not have been published previously in an international refereed scientific journal. Previous presentations at a scientific meeting, field day reports or similar documents can be published in World Rabbit Science, but they will be also subjected to the peer-review process. World Rabbit Science will publish papers of international relevance including original research articles, descriptions of novel techniques, contemporaryreviews and meta-analyses. Short communications will only accepted in special cases where, in the Editor''s judgement, the contents are exceptionally exciting, novel or timely. Proceedings of rabbit scientific meetings and conference reports will be considered for special issues. World Rabbit Science is published in English four times a year in a single volume. Authors may publish in World Rabbit Science regardless of the membership in the World Rabbit Science Association, even if joining the WRSA is encouraged. Views expressed in papers published in World Rabbit Science represent the opinion of the author(s) and do not necessarily reflect the official policy of the WRSA or the Editor-in-Chief.