作　　者： ; ; ; ; ; ;

机构地区： 四川农业大学水稻研究所

出　　处： 《Acta Genetica Sinica》 2004年第6期604-608,共5页

摘　　要： 14 9 B是由水稻多胚苗SAR 2中筛选出来的自然发生的同源多倍体 ,体细胞鉴定为三倍体 (2n =36 )。以14 9 B做母本与水稻恢复系蜀恢 36 3(R36 3)杂交 ,在杂交F1代中发现有非整倍体和二倍体个体产生 ,其中部分二倍体的自交后代在田间农艺性状表现稳定。对这个稳定F2群体进行微卫星验证 ,结果表明 :F1和F2 群体 4 0个单株的扩增带型整齐一致 ,在各个SSR多态位点只出现一条同父或同母带 ,丢失了来自父本或母本的等位位点 ,说明该F2 群体确系由杂交得来的一个早代稳定群体。 Polyploid strain 149-B,that was generated naturally from a rice twin-seedling population SAR-2,has been determined as triploid(2n=36).It was then used as the female parent crossing with a normal diploid variety SH R363.From its F_2 generation we obtained a genetic-stable population.To prove the uniformity of such a population,SSR markers were used to survey the F_2 individual plants.The results showed that F_2 individuals carried only one parental molecular marker at each polymorphic locus,and their genotypes were identical with F_1 progeny.Based on the above experiments,we consider that this F_2 population is definitely an early-generation stable population.Meanwhile,we discussed the possible mechanism of the special phenomenon as well.

关 键 词： 水稻同源三倍体 稳定 农艺性状 微卫星

领　　域： [农业科学] [农业科学]