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首页> 外文期刊>Advances in Research >Study of Gene Action and Heterosis Effects of Different Genotypes for Yield and Yield Attributing Traits in Maize (Zea mays L.)
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Study of Gene Action and Heterosis Effects of Different Genotypes for Yield and Yield Attributing Traits in Maize (Zea mays L.)

机译：玉米（Zea mays L.）不同基因型对产量和产量性状的基因作用和杂种优势效应研究

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摘要

A study of Line × Tester analysis involving 8 lines and 5 tester of yellow maize was carried out to identify high heterotic crosses and their relationship in terms of general and specific combining ability effects ( gca and sca ) for yield and its component traits. Analysis of variance exhibited highly significant difference among all the parents for different traits under study. The ratio of σ2 gca /σ2 sca was less than unity there by indicating the preponderance of non-additive gene action in the expression of majority of the characters studied. The line Z 488-4 and tester BLD 47 were identified as most promising parents due to having good general combining ability for grain yield and several other yields contributing traits. Among the crosses, HYN-10-RN 235-270 × IC 328963 and BLD 254 × BLD 47 proved as good specific combiner for kernel yield per plant and its component traits while for earliness cross BLD 254 × IMR 53 were found good specific combiner. On the basis of heterosis cross Z 488-4 × IMR 53 and BLD 266 × BLD 47 was found superior for kernel yield per plant, ear yield per plant, days to tasselling, days to silking, days to dry husk, ear girth and 100 kernel weights. Therefore, these crosses need to be further evaluation for genotype x environment interaction over different seasons and or locations.
机译：对包括8个品系和5个玉米试验品系的Line×Tester分析进行了研究，以鉴定高杂种杂交及其在产量和组成性状的一般和特异性结合能力效应（gca和sca）方面的关系。对于所研究的不同性状，所有父母之间的方差分析显示出极高的差异。 σ 2 gca /σ 2 sca 的比率在此处小于1，表示非研究了加性基因作用中大多数表达的特征。 Z 488-4系和BLD 47系被鉴定为最有前途的亲本，因为它们具有良好的谷物综合生产能力以及其他几种有助于性状的综合能力。在杂交中，HYN-10-RN 235-270×IC 328963和BLD 254×BLD 47被证明是优良的单株籽粒产量及其组成性状的特定组合，而早熟的BLD 254×IMR 53被认为是良好的特定组合。基于杂种优势，发现Z 488-4×IMR 53和BLD 266×BLD 47的杂种优势更强于每株植物的籽粒产量，每株植物的穗产量，抽穗的天数，成丝的天数，干壳的天数，耳长和100内核权重。因此，这些杂交需要进一步评估不同季节和/或位置上基因型x环境的相互作用。

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