摘要
研究了24份中国大麦矮秆种质资源的株高遗传，在它们的矮秆基因之间且与已知矮秆基因uz、sdw、br和denso进行了遗传等位性测验。结果表明，这些矮秆种质大多属隐性单基因遗传，少数受双隐性基因控制，只有1份携带1对隐性和1对不完全显性矮秆基因。研究发现，在中国大麦矮秆种质资源中，uz位点的等位基因频率相当高，多数单基因和两份双基因矮秆都与之等位。除来源于印度的矮秆品种11012．2的矮秆基因与sdw等位外，双基因矮秆盐66也有1对基因与之等位。但在实验中没有发现1份矮秆种质与价和denso存在等位关系。单基因突变品系91G318、91冬27和93－597，各自携带1对新的隐性矮秆基因。双基因突变品系1974E具有1对新的不完全显性矮秆基因。来自西藏的5份大麦矮秆种质所涉及的4对隐性矮秆基因全是新的。
The plant height inheritance of 24 Chinese barley dwarf germplasms and the allelic relahonships between the dwarf genes in them and the known dwarf genes uz, sdw, br and denso were studied. It was found that most Chinese barley dWarfs were controlled by 1 pair, a few by 2 pairs of recessive genes, only one by 1 pair recessive and 1 pair incomplete dominant genes. Allele frequence at the known dwarf gene uz locus was very high in Chinese barley dwarfs. Most monogenic and 2 digenic barley dwarfs had allelic relahonships with uz. A monogenic barley dwarf 11012.2 from India and a digenic dwarf Yan 66 were found allelic to the known dwarf gene sdw. But no dwarfs had allelic relationship with the known dwarf genes br and denso. Monogenic dwarf mutallts 91G318, 91D27 and 93-597 carried 1 pair of new recessive dwarf genes respectively. Digenic dwarf mutant 1974E possessed 1 pair of new incomplete dominant dwarf genes. Besides, 4 pairs of new recessive dwarf genes were indentified in 6 Tibetan barley dwarfs.
关键词
中国
大麦
矮秆
遗传
等位测验
种质资源
Chinese barley, Dwarf germplasm, Inheritance, Allelism test
