摘要
小麦地方品种“开县罗汉麦”( 简称KL) 具有新隐性ph 基因,且远缘杂交亲和性和胚培出苗率高。本研究用它与Ae.variabilis 杂交获杂种F1 ,并自交获得F2 、F3 ,并用推广品种回交获得F1BC1 、F2BC1 。在F2 群体中,有2 株植株的分蘖分别高达88 个、67 个,极显著高于一般小麦品种。多分蘖可节省用种量,可能在小麦育种、特别是杂交小麦育种中有用途。同时,Ae.variabilis 的白粉、条锈病抗性能在F1 、F2 的遗传背景中完全表达,这表明利用Ae.variabilis 的抗病性是可行的;此外,发现一些彼此不相连锁的来自Ae.variabilis 的易于识别的形态标记性状,这有助于将Ae.variabilis
Bread wheat cv. Kaixianluohanmai (abbr.KL) has been used as a ‘bridge’ of genetic transfer due to its new recessive ph gene, high crossability and capability of rescue culture. After selfing and backcrossing, the populations of F 2, F 3, F 1BC 1 and F 2BC 1 are got from the combinants of ‘KL×Ae.variabilis’ and ‘(KL×CS ph1b)×Ae.variabilis’. In F 2, 2 plants show multipe tillers as many as 88 and 67, respectively. Multipe tillers may be useful for wheat breeding, especially for hybrid wheat breeding. Meanwhile, resistance to powdery mildew and stripe rust derived from Ae.variabilis is totally expressed in F 1 and F 2 adult plants, indicating the usefulness for wheat improvement. Moreover, Ae.variabilis have some phenotypic markers, and most of them do not link each other, which are helpful for genetic transfer from Ae.variabilis to wheat.
出处
《四川农业大学学报》
CSCD
1999年第3期261-267,共7页
Journal of Sichuan Agricultural University
基金
四川省科委应用基础项目
关键词
小麦
PH基因
基因转移
多分蘖
遗传物质
BREAD WHEAT
AEGILOPS VARIABILIS
GENETIC TRANSFER
ph GENE
MULTIPE TILLERS