ON DEFINING A WINTER-WHEAT
ON DEFINING A WINTER-WHEAT
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DOI：
10.1007/bf00037529
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发表时间：
1989-12-01
期刊：
影响因子：
1.9
通讯作者：
CROFTS, HJ
中科院分区：
文献类型：
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作者：
CROFTS, HJ
一项针对小麦育种者和科学家的国际调查被用来确定人们对“冬小麦”一词是否有一个共同的理解。在30名受访者中，只有7人提到了对光周期的反应。因此，有人建议将其排除在任何定义之外。30名受访者中有28人提到了对春化的反应。然而，在量化这种反应的方法和将小麦称为‘冬季’所需的反应程度方面，存在着相当大的差异。得出的结论是，唯一客观和国际上一致的冬小麦定义是基于小麦所拥有的VRN基因的补充的“遗传”定义。不具有任何显性VRN等位基因的品种在非春化、长日照条件下生长时，似乎需要明显更长和更可变的时间才能抽穗。这些是“基因过冬”的小麦。
An international survey of wheat breeders and scientists was conducted to determine whether there was a common understanding of the term ''winter wheat''. Response to photoperiod was mentioned by only seven of the 30 survey respondents. It was consequently suggested that it be excluded from any definition. Response to vernalization was mentioned by 28 of the 30 respondents. However, there was considerable variation it the method of quantifying this response and the degree of response necessary for wheat to be called ''winter''. It was concluded that the only objective and internationally consistent definition of ''winter wheat'' was a ''genetic'' definition based on the complement of Vrn genes a wheat possesses. Varieties not possessing any of the dominant Vrn alleles appear to take a distinctively longer and more variable time to head when grown under non-vernalizing, long day conditions. These are ''genetically winter'' wheats.