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农学学报 ›› 2020, Vol. 10 ›› Issue (6): 75-80.doi: 10.11923/j.issn.2095-4050.cjas20191200304

所属专题: 畜牧兽医

• 畜牧/兽医/水产 • 上一篇    下一篇

高原蚕区家蚕茧层率遗传分析

任晓晓, 罗朝斌, 孙运朋, 杨万军, 吴康云()   

  1. 贵州省农业科学院蚕业研究所,贵阳 550006
  • 收稿日期:2019-12-13 出版日期:2020-06-20 发布日期:2020-07-09
  • 通讯作者:
    吴康云,男,1973年出生,贵州天柱人,研究员,硕士,主要从事桑蚕遗传育种与配套技术方面的研究。通信地址:550006 贵州省贵阳市花溪区金欣社区省农业科学院内,Tel:0851-83817229,E-mail:
  • 作者简介:

    任晓晓,女,1991年出生,山东聊城人,研究实习员,硕士研究生,从事家蚕遗传育种工作。通信地址:550006 贵州省贵阳市花溪区金欣社区省农业科学院内,Tel:0851-83817229,E-mail:xiaoxiaojiaoyou@126.com

  • 基金资助:
    贵州省科技计划项目“贵州高原蚕区优质茧配套生产技术集成与示范”(黔科合支撑[2018]2273); 贵州省科技计划项目“贵州高原桑蚕多批次高效生产技术示范与服务”(黔科合服企[2019]4008); 贵州省农科院自主创新项目“家蚕抗性品种引进鉴定、材料创新及遗传育种”([2014]003号); 贵州省农科院学术新苗培养及创新探索专项“高原蚕区家蚕品种茧层率相关QTL定位分析”([2018]5768-16)

The Cocoon Shell Ratio of Bombyx mori from Sericultural Area of Plateau: Genetic Analysis

Ren Xiaoxiao, Luo Chaobin, Sun Yunpeng, Yang Wanjun, Wu Kangyun()   

  1. Sericultural Institute, Guizhou Academy of Agricultural Sciences, Guiyang 550006, Guizhou, China
  • Received:2019-12-13 Online:2020-06-20 Published:2020-07-09

摘要:

旨在验证并丰富家蚕茧层率性状的遗传规律,为培育高茧层率的家蚕纯种提供理论依据。以高丝量品种‘菁松’、‘皓月’和中丝量品种‘芙蓉’、‘湘晖’为亲本,构建5世代遗传群体,运用多世代联合分析方法分析茧层率的遗传规律。结果表明:家蚕茧质性状具有明显的性别效应,雄性茧层率大于雌性;亲本的茧层率性状与茧层量呈显著正相关;F1代的茧层率介于两亲本之间,反交组合茧层率高于正交组合;回交群体的频数呈双峰或偏态的单峰分布;茧层率的杂种优势率在-3.82%~5.63%之间,几乎没有杂种优势。研究得出结论为茧层率高值对低值为显性,呈偏母本遗传,遗传体系中存在主基因,可能存在于性染色体上。

关键词: 家蚕, 茧层率, 遗传分析, 性别效应, 显性遗传, 主基因

Abstract:

The research is carried out to verify and supplement the heredity of cocoon shell ratio, which may provide a theoretical basis for breeding purebred silkworm with high cocoon shell ratio. The strains Jingsong, Haoyue with high silk yield and Furong, Xianghui with moderate silk yield were used as parents to construct five generations of genetic population, and then the inheritance cocoon shell ratio was analyzed by the multi-generation joint analysis method. The results showed that gender effects of cocoon quality traits were very obvious and cocoon shell ratio of male was higher than that of female. Cocoon shell ratio of parents was significantly and positively related to the cocoon shell weight. The cocoon shell ratio of F1 hybrids fell in between that of the parents. The cocoon shell ratio of the reciprocal crosses was higher than that of the orthogonal crosses. The frequency of cocoon shell ratio in backcross populations followed the bimodal distribution or skewed unimodal distribution. The heterosis rate of cocoon shell ratio ranged from -3.82% to 5.63%, which indicated that there was almost no heterosis. Therefore, high cocoon shell ratio is a dominant character with maternal inheritance, the inheritance of cocoon shell ratio is regulated by polygenes, and there are major genes in the inheritance system that may be located on sex chromosome.

Key words: Bombyx mori, Cocoon Shell Ratio, Genetic Analysis, Gender Effect, Dominant Inheritance, Major Gene

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