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首页> 外文期刊>The Madras Agricultural Journal >Studies on Genetic Divergence for Yield, Yield Components and Quality Characters in Promising Rice Varietiesof Andhra Pradesh
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Studies on Genetic Divergence for Yield, Yield Components and Quality Characters in Promising Rice Varietiesof Andhra Pradesh

机译：安得拉邦有前景的水稻品种的产量，产量构成及品质性状的遗传差异研究

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摘要

Twenty-five rice varieties were evaluated for their genetic diversity with regards to grain yield, yield components and grain quality characters. The varieties were classified into six clusters, based on Mahalanobis D2 statistics. Geographical and genetic diversity were observed to be unrelated, as varieties from diverse geographical regions were placed in the same cluster, while varieties from the same centre were grouped into different clusters. Results on inter-cluster distances revealed maximum diversity between varieties of cluster V and VI. Intra-cluster distance was maximum for cluster III, indicating the existence of variability within the cluster for the characters studied. A perusal of the results on cluster means revealed higher grain yield per plant, more number of productive tillers and number of filled grains per panicle for cluster II, while long panicle length and high head rice recovery were noticed for cluster VI, indicating the desirability of selection of varieties from these clusters for improvement of grain yield and the above yield and quality traits. Further, days to maturity and 1000 seed weight, together had accounted for 70.33 per cent of the total genetic divergence indicating their importance in the choice of parents for hybridization programmes.
机译：评价了25个水稻品种的遗传多样性，涉及谷物产量，产量组成和谷物品质特征。根据Mahalanobis D2的统计数据，该品种分为六个类。观察到地理和遗传多样性是不相关的，因为来自不同地理区域的品种被放在同一集群中，而来自同一中心的品种被分为不同的集群。群集间距离的结果显示，群集V和VI的变体之间的差异最大。聚类III的聚类内距离最大，表明对于所研究字符而言聚类内存在变异性。对簇结果的仔细研究表明，对于簇II，每株植物的籽粒产量更高，生产分till的数量和每穗的实粒数更多，而对于簇VI，则注意到较长的穗长和较高的稻谷收成，表明对从这些集群中选择品种，以提高谷物产量以及上述产量和品质性状。此外，成熟天数和1000粒种子的重量合计占总遗传差异的70.33％，表明它们在选择杂交方案的父母中很重要。

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