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首页> 外文期刊>Hereditas >Geographical Variation in Heading Traits in Wild Emmer Wheat, Triticum Dicoccoides. II. Variation in Heading date and Adaptation to Diverse Eco‐Geographical Conditions
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Geographical Variation in Heading Traits in Wild Emmer Wheat, Triticum Dicoccoides. II. Variation in Heading date and Adaptation to Diverse Eco‐Geographical Conditions

机译：野生Emmer小麦Triticum Dicoccoides抽穗特性的地理变异。二。航向日期的变化和对各种生态地理条件的适应

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Geographical variation in heading date was investigated for wild emmer wheat, Triticum dicoccoides, collected in Israel. A wide variation ranging from 6th April to 8th May was observed among 404 accessions, and inter- and intra-population variations were also detected. Correlation analysis with eco-geographical variables clearly showed that early heading types are adapted to warmer and drier conditions, while late heading types are adapted to cooler and more humid conditions. Especially for the inland populations, about 213 of the inter-population variation could be explained by five eco-geographical variables, that is, altitude, temperature, rainfall, humidity, and evaporation. Intra-population variation was also largely affected by temperature and water conditions. In contrast to the relatively uniform populations in the western area, the variation was larger in the southeastern area where wild emmer wheat grows under severe aridity stress. Considering that vernalization response and narrow-sense earliness were related to heading date in wild emmer wheat, the variation of these traits was essential for the adaptation to macro- and microgeographical heterogeneities or instability of growing conditions. It was concluded that eco-geographical heterogeneity is an important indicator to measure the genetic variability of adaptive traits.
机译：调查了在以色列收集的野生Emmer小麦Triticum dicoccoides抽穗期的地理差异。在404个保藏号中观察到4月6日至5月8日的广泛变异，并且还检测到种群间和种群内变异。与生态地理变量的相关性分析清楚地表明，早期航向类型适合于温暖和干燥的条件，而晚期航向类型适合于凉爽和潮湿的条件。特别是对于内陆人口来说，人口之间的大约213种变化可以用五个生态地理变量来解释，即海拔，温度，降雨量，湿度和蒸发量。人口内部的变化也很大程度上受温度和水条件的影响。与西部地区相对均匀的种群相反，东南部地区的野生Emmer小麦在严重干旱胁迫下生长，差异较大。考虑到野生Emmer小麦的春化反应和狭义早熟与抽穗期有关，因此这些性状的变异对于适应宏观和微观地理异质性或生长条件的不稳定至关重要。结论是，生态地理异质性是衡量适应性状遗传变异的重要指标。

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