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冬小麦耐霜性是其耐寒性的一部分。幼苗耐霜冻,指的是它们可以在霜冻情况下存活而不受大的伤害。为了研究耐霜性的遗传控制.进行了人工霜冻试验。耐霜冻性是由加性-显性系统控制的。双列杂交分析结果表明.加性和非加性基因的作用在这一性状的遗传中均很重要。低耐霜性由显性基因控制,高耐霜性由隐性基因控制.单体和代换分析结果表明.在21对小麦染色体中,至少有10对与耐霜性和耐寒性有关,关系最大的是5A和5D染色体。基因Fr1(Frostl)被定位在5A染色体的长臂上。品种间杂交、染色体操纵以及单克隆变异的诱导可能是扩充耐霜冻基因库的适宜手段。
Winter wheat’s frost resistance is part of its cold tolerance. Frost resistance of seedlings means that they can survive the frost without major damage. In order to study the genetic control of frost resistance. An artificial frost test was conducted. Frost resistance is controlled by additive-dominance systems. Double-line hybridization analysis results show. The role of additive and non-additive genes is important in the inheritance of this trait. Low resistance to frost is controlled by dominant genes, and high resistance to frost is controlled by recessive genes. Monomer and substitution analysis results show. Of the 21 pairs of wheat chromosomes, at least 10 pairs are associated with frost resistance and cold tolerance, most closely related to chromosomes 5A and 5D. The gene Fr1 (Frostl) is located on the long arm of chromosome 5A. Interbreeding crosses, chromosome manipulation, and the induction of monoclonal variants may be suitable tools for expanding the frost-resistant gene pool.