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Selection of sub-populations to preserve with high priorities for the conservation of genetic diversity in the Japanese Black cattle population

选择优先保护的亚种群以保护日本黑牛种群的遗传多样性

基本信息

批准号：
16580234
负责人：
NOMURA Tetsuro
金额：
$ 1.02万
依托单位：
Kyoto Sangyo University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16580234/
关键词：
Japanese Black cattle genetic diversity genetic resource strain sub-population core set method Weitzman's method Weitzman

项目摘要

Since liberalization of beef import restriction in 1991, domestic production of high-quality beef has received more emphasis in Japan, and meat quality (especially, ‘beef marbling') of Japanese Black cattle has been remarkably improved by the genetic evaluation system of breeding animals. However, due to the intensive use of a few sires with high genetic merit of beef marbling, drastic decline of genetic diversity is an increasing problem of this breed. In the present study, the sub-populations (i.e., local strains) to preserve with high priorities were assessed to conserve the genetic diversity in the Japanese Black population. Two different methods, i.e., the Weitzman's method and the core set method, were applied to the pedigree and body measurement data obtained from 25 major local populations. The results from the two methods strongly suggest that the five traditional populations in Chugoku district (Hyogo, Tottori, Okayama, Hiroshima and Shimane) and the three regional populations in Kyusyu district (Oita, Miyazaki and Kagoshima) should be preserved with high priorities. It has been proposed that rotational mating system with several sire lines could be efficient for the conservation of genetic diversity in the Japanese Black population. The result obtained from this study is expected to give basic information for the application of the rotational mating.

自1991年放宽牛肉进口限制以来，日本国内生产高质量牛肉受到更多重视，通过育种动物的遗传评估系统，日本黑牛的肉质（特别是“牛肉大理石花纹”）得到了显着改善。然而，由于大量使用少数具有高大理石花纹遗传价值的公牛，该品种的遗传多样性急剧下降是一个日益严重的问题。在本研究中，亚群（即，当地菌株），以保持高度优先级进行了评估，以保护日本黑人人口的遗传多样性。两种不同的方法，即，采用Weitzman法和核心集法对25个主要地方群体的系谱和体尺资料进行了分析。这两种方法的结果表明，中国地区的5个传统种群（兵库、鸟取、冈山、广岛和岛根）和九州地区的3个区域种群（大分、宫崎和鹿儿岛）应优先保护。有研究表明，多个父系的轮换交配制度可以有效地保护日本黑人群体的遗传多样性。研究结果为旋转配接技术的应用提供了基础资料。

项目成果

期刊论文数量（52）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Effective population size under random mating with a finite number of mating.

有限交配次数随机交配下的有效种群规模。

DOI：
发表时间：
2005
期刊：
Generics 171
影响因子：
0
作者：
Nishimura K;Yamauchi N;Gamo T;Sato F;Soh T;Hattori M-A;T.Honda;Manabu Arai et al.;T.Honda;Toru Gamo et al.;T.Nomura;Kyohei Nishimura et al.;Kyohei Nishimura et al.;T.Nomura
通讯作者：
T.Nomura

Prediction of inbreeding in commercial females maintained by rotational mating with partially isolated sire lines.

通过与部分隔离的父系轮流交配维持的商业雌性近交的预测。