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首页> 外文期刊>Genetika >Genotypic variations for photoassimilates partitioning to the grains during early development of endosperm in wheat: Association with grain weight
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Genotypic variations for photoassimilates partitioning to the grains during early development of endosperm in wheat: Association with grain weight

机译：小麦胚乳早期发育过程中光同化物分配到籽粒的基因型变化：与粒重的关系

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There is little information on genotype variations for photoassimilates partitioning to the grains during early development of endosperm in wheat. Eighty-one wheat cultivars were examined in the Moghan region of Iran during 2010-2011 and 2013-2014 growing seasons. The amount and rate of photoassimilates partitioning to the grains were measured in the tested cultivars during anthesis-16 days after anthesis (DAA) and 16 DAA-maturity phases using time dependent changes in spike dry weight. There were substantial genetic variations in the amount and rate of partitioned photoassimilates to the grains during anthesis-16 DAA and 16 DAA-maturity phases. Part of these variations could be attributed to cultivars differences in anthesis time, spike dry weight at anthesis, and grain number per spike. Taking them into accounts, there were some cultivars but they differed in partitioned photoassimilates toward grains during anthesis-16 DAA and 16 DAA-maturity phases, further supporting the idea that breeding for photoassimilates partitioning during these phases was a possibility. The results yielded for 2013-2014 showed that there is close association between photoassimilates partitioning to the grain during anthesis-16 DAA and individual grain weight. The results suggest that in case wheat breeders could improve photoassimilates partitioning to the grains during anthesis-16 DAA, it would result in increased grain size and weight in the wheat.
机译：关于小麦胚乳早期发育过程中光同化物分配到谷粒的基因型变异的信息很少。在2010-2011年和2013-2014年生长季节期间，在伊朗的莫罕地区检查了81个小麦品种。在花后16天（DAA）和16个DAA成熟期，使用随时间变化的穗干重，在受试品种中测量了光合同化物分配给谷物的数量和速率。在花期16 DAA和16 DAA成熟期，分配给谷粒的光同化物的数量和速率存在显着的遗传变异。这些变化的部分原因可能是由于花期时间，花期穗干重和每个穗粒数的品种差异所致。考虑到它们，有一些品种，但是在花药16 DAA和16 DAA成熟期期间，向种子分配的光同化物不同，这进一步支持了在这些阶段进行光同化物分配育种的想法。 2013-2014年的结果表明，在花药16 DAA期间分配到谷物上的光同化物与单个谷物重量之间存在密切关联。结果表明，如果在花粉期16 DAA期间小麦育种者可以改善光同化物在谷物中的分配，则将导致小麦的籽粒大小和重量增加。

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