为了挖掘ω-醇溶蛋白在小麦品质育种中的潜力,利用2对引物采用基因组PCR方法分别从阿拉拉特小麦(Triticum timopheevi Zhuk.var.araraticum)、栽培二粒小麦(Triticum turgidum ssp.dicoccon)、提莫菲维小麦(Triticum timopheevi)、栽培一粒小麦(Triticum monococcumssp.monococcum)和野生一粒小麦(Triticum monococcum var.boeoticum)5个小麦属物种中克隆出ω-醇溶蛋白序列,并对其进行序列分析。结果表明,本研究共克隆到6条新的ω-醇溶蛋白序列,归属于ARH、ATN和TRQ三种类型。这些新的ω-醇溶蛋白序列的长度为927~1 095bp。在这6个序列中,除KR082150拥有两个甲硫氨酸(Met)外,其余的均缺少含硫氨基酸。进化分析表明,本研究获得的6条ω-醇溶蛋白序列聚在了2个主要的分支,其中N端第一个氨基酸为丙氨酸(Ala)的ω-醇溶蛋白聚在了一个大的分支中,而TRQ类型的则聚在了另一个分支中。
In order to exploit the potential value ofω-gliadin in wheat quality breeding,two pairs of primers were used to amplify theω-gliadins fromT.timopheevi Zhuk.var.araraticum,T.turgidum ssp.dicoccon,T.timopheevi,T.monococcum ssp.monococcum and T.monococcum var.boeoticum.Six novelω-gliadin sequences were isolated,which belonged to three types:ARH,ATN and TRQ.The lengths of 6sequences varied from 927 to 1 095 bp.Only KR082150 has two methionines,and the others have no cysteines and methionines.Phylogenetic analysis indicated thatω-gliadin sequences obtained in this study were mainly divided into 2branches.The ARH and ATN types ofω-gliadin sequences were clustered together in one branch,while TRQ type ofω-gliadin sequence was clustered in the other branch.