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首页> 外文期刊>Crop Research >Studies on genetic divergence in rice (Oryza sativa L.) germplasm.
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Studies on genetic divergence in rice (Oryza sativa L.) germplasm.

机译：水稻种质遗传多样性的研究。

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摘要

The success of any breeding programme depends upon the selection of suitable parents for developing elite recombinants. Genetic divergence analysis of 150 genotypes of rice including five check varieties Jaya, Mandya vijaya, Prasanna, Rasi and Vasumathi using Mahalanobis D2 statistics revealed the existence of considerable diversity among the genotypes. On the basis of D2 values, the genotypes were categorized into 13 clusters. Cluster XI was the largest consisting of 28 genotypes, while cluster I contained only two genotypes. A wide range of variation was observed in cluster means for all the 11 quantitative characters studied. Maximum intra-cluster distance was observed in cluster IX. Cluster I showed maximum inter-cluster distance with cluster IX indicating that the genotypes from these clusters may be used as potential donors in hybridization programme to obtain desirable recombinants. Grains per panicle and spikelet fertility were the major characters contributing towards divergence among the genotypes.
机译：任何育种计划的成功都取决于选择合适的亲本以开发优良的重组体。利用Mahalanobis D 2 的统计数据，对150个水稻基因型的遗传多样性进行了分析，其中包括5个检验品种Jaya，Mandya vijaya，Prasanna，Rasi和Vasumathi，揭示了这些基因型之间存在相当大的多样性。根据D 2 值，将基因型分为13个簇。群集XI是最大的，由28个基因型组成，而群集I仅包含两个基因型。对于所研究的所有11个定量特征，均值均值均在很大范围内变化。在群集IX中观察到最大群集内距离。簇I显示出与簇IX的最大簇间距离，表明来自这些簇的基因型可以用作杂交程序中的潜在供体以获得所需的重组体。每穗粒数和小穗繁殖力是造成基因型差异的主要特征。

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