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Genetic divergence in upland rice varieties

机译：陆地稻品种的遗传差异

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Eighteen upland rice varieties of Asian and African origin were studied to understand genetic divergence among these genotypes for 15 yield attributing characters and 20 selected root, shoot and leaf characters associated with drought tolerance. Wider diversity for yield components compared to drought components was recorded among these genotypes. Aits varieties had low diversity for yield components. Cluster mean value of 15 quantitative traits related to grain yield indicated that variety Vandanamaintained proper balance between different yield components. The choice of this genotype as donor in hybridization programme vrithjapoiiica could give fruitful results in developing high yielding drought tolerant genotypes for uplands. Based on selected root, shoot and leaf characters, coexistence of japonica and inclica, indica and A?s, and Aus and japanica rices in one cluster was identified. Placement of 4 highly drought tolerant traditional genotypes belonging to Aits and japonica varietal group in one cluster suggested that basic mechanism of adaptation under upland condition was the same in two geographical regions.
机译：研究了18个亚洲和非洲起源的旱稻品种，以了解这些基因型之间的遗传差异，以了解15个与干旱耐受相关的产量归因特征和20个选定的根，芽和叶特征。在这些基因型中，与干旱成分相比，产量成分的多样性更大。 Aits品种的产量构成成分多样性低。 15个与产量相关的数量性状的聚类平均值表明，Vandana品种在不同产量组成部分之间保持了适当的平衡。在杂交计划vrithjapoiiica中选择该基因型作为供体可以为开发高产耐旱基因型提供高产的结果。根据选定的根，茎和叶特征，鉴定出粳稻和斜纹、,稻和A？s以及澳大利亚稻和日本稻共存于一个簇中。将属于Aits和粳稻品种的4种高度耐旱的传统基因型放在一个集群中表明，在高地条件下适应的基本机制在两个地理区域是相同的。

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