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Genetic analysis of some morphological traits in synthetic $$\times $$ naturally polyploid cotton derivatives
Journal of Genetics ( IF 1.5 ) Pub Date : 2020-09-22 , DOI: 10.1007/s12041-020-01230-w
Suruchi Vij , Dharminder Pathak , Pankaj Rathore , Pooja Nikhanj

Cotton has received attention of geneticists since more than a century. Gossypium hirsutum , the predominantly cultivated cotton species worldwide, has a narrow genetic base. It is important to broaden its genetic base through introgression of novel alleles from related species. Here, we report the development and characterization of a backcross population derived from the hybridization of a ‘synthetic’ (derived by crossing and chromosomal doubling of nonprogenitor Gossypium species) and natural tetraploid upland cotton. ‘Synthetic’ was observed to be male-sterile and thus, was used as the female parent. A total of 7434 flowers were pollinated to obtain 1868 BC 1 F 1 seeds by direct and reciprocal crosses. Characterization of the experimental plant material was conducted in the field for several morphological traits such as pubescence on the stem, leaf, petiole and bract, presence/absence of petal spot, petal margin colouration and stamen filament colouration. Genetic analysis revealed that petal margin colouration phenotype was governed by a single dominant gene, whereas the petal spot and filament colouration phenotypes manifested segregation distortion. None of the BC 1 F 1 plants was devoid of trichomes thus demonstrating that presence of trichomes is dominant over their absence. Modern upland cotton cultivars are usually devoid of petal spot, petal margin colouration and stamen filament colouration. These floral anthocyanin pigmentation characteristics, if fixed in the cotton germplasm, may serve as diagnostic features for the identification of cultivars during DUS testing as well as in the maintenance breeding programmes.

中文翻译:

合成$$\times $$天然多倍体棉花衍生物部分形态性状的遗传分析

一个多世纪以来,棉花一直受到遗传学家的关注。Gossypium hirsutum 是世界范围内主要种植的棉花品种,其遗传基础很窄。通过从相关物种中引入新的等位基因来拓宽其遗传基础是很重要的。在这里,我们报告了源自“合成”(通过非祖先棉属物种的杂交和染色体加倍)和天然四倍体陆地棉杂交的回交种群的发展和表征。观察到“合成的”是雄性不育的,因此被用作母本。通过直接和互交,总共对7434朵花授粉以获得1868 BC 1 F 1 种子。在田间对实验植物材料进行了几种形态特征的表征,例如茎上的短柔毛、叶、叶柄和苞片,有无花瓣斑点,花瓣边缘着色和雄蕊花丝着色。遗传分析表明,花瓣边缘着色表型受单一显性基因控制,而花瓣斑点和花丝着色表型表现出分离扭曲。BC 1 F 1 植物中没有一株没有毛状体,因此证明毛状体的存在比它们不存在时占优势。现代陆地棉品种通常没有花瓣斑点、花瓣边缘着色和雄蕊花丝着色。这些花花青素色素沉着特征,如果固定在棉花种质中,可以作为 DUS 测试期间以及维持育种计划中品种鉴定的诊断特征。花瓣边缘着色和雄蕊花丝着色。遗传分析表明,花瓣边缘着色表型受单一显性基因控制,而花瓣斑点和花丝着色表型表现出分离扭曲。BC 1 F 1 植物中没有一株没有毛状体,因此证明毛状体的存在比它们不存在时占优势。现代陆地棉品种通常没有花瓣斑点、花瓣边缘着色和雄蕊花丝着色。这些花花青素色素沉着特征,如果固定在棉花种质中,可以作为 DUS 测试期间以及维持育种计划中品种鉴定的诊断特征。花瓣边缘着色和雄蕊花丝着色。遗传分析表明,花瓣边缘着色表型受单一显性基因控制,而花瓣斑点和花丝着色表型表现出分离扭曲。BC 1 F 1 植物中没有一株没有毛状体,因此证明毛状体的存在比它们不存在时占优势。现代陆地棉品种通常没有花瓣斑点、花瓣边缘着色和雄蕊花丝着色。这些花花青素色素沉着特征,如果固定在棉花种质中,可以作为 DUS 测试期间以及维持育种计划中品种鉴定的诊断特征。遗传分析表明,花瓣边缘着色表型受单一显性基因控制,而花瓣斑点和花丝着色表型表现出分离扭曲。BC 1 F 1 植物中没有一株没有毛状体,因此证明毛状体的存在比它们不存在时占优势。现代陆地棉品种通常没有花瓣斑点、花瓣边缘着色和雄蕊花丝着色。这些花花青素色素沉着特征,如果固定在棉花种质中,可以作为 DUS 测试期间以及维持育种计划中品种鉴定的诊断特征。遗传分析表明,花瓣边缘着色表型受单一显性基因控制,而花瓣斑点和花丝着色表型表现出分离畸变。BC 1 F 1 植物中没有一株没有毛状体,因此证明毛状体的存在比它们不存在时占优势。现代陆地棉品种通常没有花瓣斑点、花瓣边缘着色和雄蕊花丝着色。这些花花青素色素沉着特征,如果固定在棉花种质中,可以作为 DUS 测试期间以及维持育种计划中品种鉴定的诊断特征。BC 1 F 1 植物中没有一株没有毛状体,因此证明毛状体的存在比它们不存在时占优势。现代陆地棉品种通常没有花瓣斑点、花瓣边缘着色和雄蕊花丝着色。这些花花青素色素沉着特征,如果固定在棉花种质中,可以作为 DUS 测试期间以及维持育种计划中品种鉴定的诊断特征。BC 1 F 1 植物中没有一株没有毛状体,因此证明毛状体的存在比它们不存在时占优势。现代陆地棉品种通常没有花瓣斑点、花瓣边缘着色和雄蕊花丝着色。这些花花青素色素沉着特征,如果固定在棉花种质中,可以作为 DUS 测试期间以及维持育种计划中品种鉴定的诊断特征。
更新日期:2020-09-22
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