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首页> 外文期刊>Crop Research >Genetic diversity of rice genotypes for submergence tolerance.
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Genetic diversity of rice genotypes for submergence tolerance.

机译：淹水耐受性的水稻基因型的遗传多样性。

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Sixty-four rice genotypes were screened under submergence conditions to study the diversity pattern among the genotypes for identification and development of varieties suitable for flood prone areas. The genotypes were grouped into eight clusters. Maximum of 22 genotypes were grouped into cluster I followed by cluster II consisting of 14 genotypes. Clusters IV and VI were with single genotype indicating highest heterogeneity among the genotypes. Maximum inter-cluster distances were observed between clusters IV and VIII (3269.73) and V and VIII (3248.71). Maximum contribution to total divergence was observed from traits viz., test weight, relative shoot elongation, grain yield per plant and days to 50% flowering indicating importance of these characteristics for submergence tolerance. Hybridization between clusters IV and VIII may result in desirable segregants with high yield, minimal shoot elongation, fast recovery after de-submergence as these groups are extreme for traits associated with submergence tolerance.
机译：在淹水条件下筛选了64个水稻基因型，以研究基因型之间的多样性模式，以鉴定和开发适合易发洪水地区的品种。基因型被分为八个簇。最多将22个基因型分组为I类，然后是由14个基因型组成的II类。群集IV和VI具有单一基因型，表明基因型中的异质性最高。在群集IV和VIII（3269.73）与群集V和VIII（3248.71）之间观察到最大群集间距离。从性状即试验重量，相对枝条伸长，单株籽粒产量和开花至50％的天数观察到对总分歧的最大贡献，表明这些特征对于耐淹水性很重要。簇IV和VIII之间的杂交可以产生期望的分离物，其具有高产量，最小的枝条伸长，去淹后快速恢复，因为这些组对于与淹没耐受性相关的性状是极端的。

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