Seasonal conditions influence dormancy and preharvest sprouting tolerance of wheat (Triticum aestivum L.) in the field
Seasonal conditions influence dormancy and preharvest sprouting tolerance of wheat (Triticum aestivum L.) in the field
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DOI：
10.1016/j.fcr.2008.01.003
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发表时间：
2008-05-10
影响因子：
5.8
通讯作者：
Mares, D. J.
中科院分区：
文献类型：
--
作者：
Biddulph, T. B.;Plummer, J. A.;Mares, D. J.
收获前发芽发生在成熟后的降雨后，降低了谷物的质量和价值。成熟期休眠是小麦育种者经常利用的一个特性，以提高对发芽的耐受性。为了确定环境对成熟休眠和提高收获前发芽耐受性之间的预测关系的影响，在成熟时的休眠（发芽指数）和成熟时的谷物质量（降落数），然后在降雨后，在三个季节进行了测量。根据这些结果，可以得出三个主要结论。首先，具有强休眠性的基因型（在成熟后的2个月期间，尽管接受高达122 mm的降雨，但在所有地点和季节的发芽指数300 s）。充足的收获前发芽耐受性也发生在休眠基因型，只有胚胎成分，但在所有最严重的条件。第二，虽然环境和基因型与环境互作的影响是显著的，但G与E的互作对变异的解释并不多（
Preharvest sprouting occurs following rainfall after maturity and reduces grain quality and value. Dormancy at maturity is a trait frequently used by wheat breeders to improve tolerance to sprouting. To determine the environmental influence on the predicative relationship between dormancy at maturity and improved preharvest sprouting tolerance, dormancy (germination index) at maturity and grain quality (falling number) at maturity and then, after rainfall, was measured over three seasons. Based on the results it was possible to draw three main conclusions. Firstly, genotypes with strong dormancy (germination index 300 s at all sites and seasons for the 2-month period after maturity despite receiving up to 122 mm of rain. Adequate preharvest sprouting tolerance also occurred in dormant genotypes, with just the embryo component; in all but the most severe conditions. Secondly, though the effect of environment and interaction of genotype and environment was significant, the G by E interaction did not account for a large proportion of the variation (