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首页> 外文期刊>Australian Journal of Crop Science >Inheritance pattern of earliness in cotton (Gossypium hirsutum L.)
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Inheritance pattern of earliness in cotton (Gossypium hirsutum L.)

机译：棉花（Gossypium hirsutum L.）的早期遗传模式

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Fifty one genotypes of Gossypium hirsutum L. were evaluated for variation based on earliness characteristics and seed cotton yield. Seven divergent genotypes including four early and three late maturing genotypes were crossed in a full diallel mating system. Preliminary ANOVA showed significant differences for all the traits.. Additive-dominance model was employed for the interpretation of inheritance pattern controlling earliness and seed cotton yield. The scaling tests fully met the pre-requisites of additive-dominance model and all the traits in F1 generation showed complete adequacy. The data for seed cotton yield in F1 and days take to 1st boll opening in F2 generation were partially adequate for additive-dominance model and for boll maturation period was inadequate in F2 generation. Additive component (D) and dominance components (H1&H2) were found significant for all the traits thus confirming the contribution of both additive and non-additive effects in both generations except for days to 1st flower in F2 generation where the dominance components were non-significant. Formal ANOVA results revealed the contribution of both additive ‘a’ and non additive effects ‘b’ for all the traits in both generations except for the trait nodes for 1st fruiting branch. Inheritance of incase of nodes to 1st branch was controlled by partial dominance; earliness index by over dominance; and days taken to 1st boll opening and seed cotton yield by complete dominance in both generations. In F1 generation, days to 1st flower was controlled by over dominance while in F2 it was inherited additively. Boll maturation period was controlled by over dominance. Heritability estimates in both generations remained moderate to high except for days to 1st flower where it was very low. Hybrid vigour can be exploited in the case of traits controlled by complete dominance and over dominance while in cases additive control pedigree selection might be fruitful for improvement of the crop.
机译：基于早熟特性和籽棉产量，评估了五十一种陆地棉（Gossypium hirsutum L.）的基因型变异。七个完全不同的基因型，包括四个早期成熟的基因型和三个晚期成熟的基因型，在一个完整的二代交配系统中杂交。初步的方差分析显示所有性状都有显着性差异。采用加性-主导模型解释控制早熟和籽棉产量的遗传模式。规模测试完全满足加性优势模型的先决条件，并且F1代的所有特征均显示出完全的充分性。 F1代的棉籽产量和F2代第一次铃打开的天数对于加性优势模型来说是部分足够的，而F2代的棉铃成熟期数据则不足。发现所有性状的加性成分（D）和显性成分（H1＆H2）均显着，从而证实了两个世代中加性和非相加作用的贡献，除了在F2代中第一朵花的天数（显性成分不显着） 。正式的方差分析结果表明，除了第一果枝的性状节点外，两个世代的所有性状都具有加性“ a”和非加性效应“ b”。节点到第一个分支的情况的继承是由部分优势控制的。过度支配的早期指数;并在两个世代中完全占据主导地位，开始第一次棉铃期和籽棉产量。在F1代中，至第一朵花的天数由超支配控制，而在F2中，它是累加遗传。铃铃的成熟期受过度优势控制。除了第一天花很低的几天到第二天，两代的遗传力估计都保持中到高。在由完全优势和过度优势控制的性状的情况下，可以利用杂种优势，而在附加控制谱系选择的情况下，可能对改良作物具有丰硕的成果。

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