论文部分内容阅读
小麦属中栽培最广的是普通小麦(Tr·acstivum)。它是生物进化过程中自然形成的一种异源六倍体,染色体数为2n=6X=42,包含有A A、B B、D D三个染色体组。关于各组染色体的来源问题,曾引起国内外很多小麦科研工作者极大的注意,并进行了深入的研究。其中A组和D组的来源已有比较明确的结论。一般认为A组来自一粒小麦(Tr·mono-coccum),D组则由粗山羊草(Aegilops squarrosa)提供。至于B组,虽然一直有人认为来自拟斯卑尔脱山羊草(Ae.speltoides),但也有人认为是由A组演化而来,或来源于已绝迹的二倍体亲缘物种,成为两个以上与拟斯卑尔脱山羊草相近的物种所提供,并人工合成了普通小麦。即:
The most widely cultivated wheat genus is Tr. Acstivum. It is a naturally occurring hexaploid formed during the evolution of biology. The number of chromosomes is 2n = 6X = 42, which includes A A, B B and D D. On the origin of each group of chromosomes, many researchers at home and abroad have aroused great attention and carried out in-depth research. Among them, the sources of Group A and Group D have relatively clear conclusions. Group A is generally considered to be from Tr. Mono-coccum and group D from Aegilops squarrosa. As for Group B, although some people always think that it is from Ae.speltoides, some people think that it is evolved from Group A or from extinct diploid relatives and become more than two Provided with species similar to Spearman goat, and wheat synthetically synthesized. which is: