...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>European Journal of Agronomy >The effect of breeding on the phenology of Italian durum wheats: from landraces to modern cultivars.
【24h】

The effect of breeding on the phenology of Italian durum wheats: from landraces to modern cultivars.

机译：育种对意大利硬粒小麦物候的影响：从地方品种到现代品种。

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

An understanding of the changes in phenology resulting from durum wheat breeding in Italy can inform breeding objectives for durum wheat improvement in Mediterranean environments. The phenology of a set of 20 durum wheat cultivars, grouped according to their period of release into 'old', 'intermediate' and 'modern', was compared in two sowings (September and May) with or without artificial vernalization. The vernalization treatment and the 6 h range in daylength and wide variation in temperature were responsible for the variation in anthesis date from 817 to 2105 degrees Cd (base 0 degrees C) from sowing. Old cultivars had the greatest photoperiod sensitivity and cold requirement, intermediate ones the greatest earliness per se and modern ones the least photoperiod sensitivity and greatest earliness per se. The first substantive effect of breeding in Italy on phenology was achieved with introgression from syriacum germplasm, which increased earliness both by an increase in earliness per se and a reduction in photoperiod sensitivity. The next step, characterized by the introduction of the semi-dwarfing gene Rht1, had a specific effect of reducing photoperiod sensitivity, although the modern group of varieties has a relatively low level of earliness per se, which is fundamental for preserving and increasing the length of the TS-anthesis period. Some quantitative cold requirement still persists in Italian germplasm, although all the cultivars tested are classified as spring types. The main phenological events affected by the changes in anthesis date resulting from breeding depend on the mechanism involved. Variability among cultivars within each group is also described..
机译：了解意大利硬粒小麦育种导致的物候变化，可以为地中海环境中硬粒小麦改良的育种目标提供依据。在有或没有人工春化处理的两个播种期（9月和5月）中，比较了一组20个硬粒小麦品种的物候，将其按照释放的时期分为“老”，“中”和“现代”。春化处理和日长的6 h范围以及温度的广泛变化是造成播种后花期从817到2105摄氏度（0摄氏度）的变化的原因。老品种对光周期的敏感性和耐寒性最高，中间品种对光周期的敏感度最高，而现代的对光周期的敏感度最低，并且本身的危害性最高。 syriacum种质的渗入实现了意大利育种对物候学的第一个实质性影响，这既通过提高本身的早期性又降低了光周期的敏感性而提高了早期性。下一步，以引入半矮化基因Rht1为特征，尽管现代品种本身具有相对较低的早熟水平，但其具有降低光周期敏感性的特定效果，这对于保存和增加其长短至关重要TS花期的时间。尽管所有测试的品种都被归类为春季类型，但意大利种质仍存在一些定量的寒冷需求。受育种引起的开花期变化影响的主要物候事件取决于所涉及的机制。还描述了每个组中品种之间的差异。

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