...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Experimental Botany >Anthesis date mainly explained correlations between post-anthesis leaf senescence, grain yield, and grain protein concentration in a winter wheat population segregating for flowering time QTLs
【24h】

Anthesis date mainly explained correlations between post-anthesis leaf senescence, grain yield, and grain protein concentration in a winter wheat population segregating for flowering time QTLs

机译：花期主要解释花期QTLs分离的冬小麦群体花后叶片衰老，籽粒产量和籽粒蛋白质浓度之间的相关性。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The genetic variability of the duration of leaf senescence during grain filling has been shown to affect both carbon and nitrogen acquisition. In particular, maintaining green leaves during grain filling possibly leads to increased grain yield, but its associated effect on grain protein concentration has not been studied. The aim of this study was to dissect the genetic factors contributing to correlations observed at the phenotypic level between leaf senescence during grain filling, grain protein concentration, and grain yield in winter wheat. With this aim in view, an analysis of quantitative trait locus (QTL) co-locations for these traits was carried out on a doubled haploid mapping population grown in a large multienvironment trial network. Pleiotropic QTLs affecting leaf senescence and grain yield and/or grain protein concentration were identified on chromosomes 2D, 2A, and 7D. These were associated with QTLs for anthesis date, showing that the phenotypic correlations with leaf senescence were mainly explained by flowering time in this wheat population. Study of the allelic effects of these pleiotropic QTLs showed that delaying leaf senescence was associated with increased grain yield or grain protein concentration depending on the environments considered. It is proposed that this differential effect of delaying leaf senescence on grain yield and grain protein concentration might be related to the nitrogen availability during the post-anthesis period. It is concluded that the benefit of using leaf senescence as a selection criterion to improve grain protein concentration in wheat cultivars may be limited and would largely depend on the targeted environments, particularly on their nitrogen availability during the post-anthesis period.
机译：谷物灌浆过程中叶片衰老持续时间的遗传变异性已显示会影响碳和氮的吸收。特别是在灌浆过程中保持绿叶可能会导致谷物产量增加，但尚未研究其对谷物蛋白质浓度的相关影响。本研究的目的是剖析促成表型水平的遗传因素，这些表型水平在冬小麦灌浆过程中叶片衰老，籽粒蛋白质浓度和籽粒产量之间具有相关性。出于这个目的，对在大型多环境试验网络中生长的双倍单倍体作图群体进行了这些性状的数量性状基因座（QTL）共位分析。在染色体2D，2A和7D上鉴定了影响叶片衰老和籽粒产量和/或籽粒蛋白质浓度的多效QTL。这些与花期的QTL相关，表明该小麦群体中与叶衰老的表型相关性主要由开花时间解释。对这些多效性QTL的等位基因效应的研究表明，根据所考虑的环境，延迟叶片衰老与提高谷物产量或谷物蛋白质浓度相关。提出这种延迟叶片衰老对籽粒产量和籽粒蛋白质浓度的不同影响可能与花后期氮素的有效利用有关。结论是，使用叶片衰老作为选择标准来提高小麦品种籽粒蛋白质浓度的益处可能有限，并且在很大程度上取决于目标环境，特别是在花后时期的氮素利用率。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号