偏凸山羊草6M^v染色体在不同四川小麦品种中的传递  

Transmission of Chromosome 6M^v from Aegilops ventricosa in Sichuan Wheat Varieties

作　　者：刘琳[1,2] 邓光兵[1,2] 易玲[3] 李林[4] 赵柳笛[4] 龙海[1] 潘志芬[1] 余懋群[1] 

机构地区：[1]中国科学院成都生物研究所 [2]中国科学院研究生院,北京100049 [3]四川农业大学小麦研究所,雅安625014 [4]西华师范大学生命科学学院,南充637002

出　　处：《应用与环境生物学报》2010年第1期50-53,共4页Chinese Journal of Applied and Environmental Biology

基　　金：中国科学院知识创新工程重要方向项目(Nos.KSCX2-SW-304;KSCX2-YW-N-052);国家科技支撑计划项目(No.2006BA01A02);四川省农作物育种攻关计划项目资助~~

摘　　要：利用高抗条锈病的小麦-偏凸山羊草6Mv/6B代换系(Moisson 6Mv/6B)与高感条锈病的四川小麦绵阳26、绵阳93-124和SW3243进行杂交,并用这些品种分别与杂种F1进行正反回交,通过对其F1、F2和BC1的结实率观察、细胞学分析以及条锈病抗性反应鉴定,研究了偏凸山羊草6Mv染色体在不同四川小麦背景中的传递频率,分析了代换染色体6Mv代偿6B的能力.结果显示,当含6Mv染色体的F1植株作母本时,平均回交结实率为83.10%,最高可达95.51%;而含6Mv染色体的F1植株作父本时,平均回交结实率则为48.61%,最低仅为28.47%,暗示6Mv染色体可能对花粉参与受精的能力有一定不利影响,且结实率与小麦基因型相关.在与绵阳26、绵阳93-124和SW3243的所有杂交组合中,6Mv染色体通过雌、雄配子的传递率没有显著差异,但其传递率与小麦品种显著相关.另外,在单体代换植株中6Mv染色体通过自交的传递率也受小麦品种基因型的影响.研究结果为小麦-偏凸山羊草6Mv/6B代换系在小麦育种上的利用提供了理论依据.The wheat-Aegilops ventricosa substitution line Moisson 6Mv/6B（highly resistant to stripe rust） was crossed with Sichuan wheat varieties mianyang 26,mianyang 93-124 and SW3243（highly susceptible to stripe rust）,respectively.Their F1 hybrids were further backcrossed as male and female to corresponding wheat varieties.The seed-setting rate,6Mv chromosome confirmation,and resistance to stripe rust of the subsequent F1,F2 and BC1 plants were investigated for studying the transmission of chromosome 6Mv of Ae.ventricosa with different genetic backgrounds of Sichuan wheat varieties and analyzing the compensatory ability of 6Mv to 6B.The average seed-setting rate of the backcross via 6Mv as female donor was 83.10%,with the highest of 95.51%.However,the average seed-setting rate of the backcross via 6Mv as male donor was 48.61%,with the lowest of 28.47%.These results suggested that chromosome 6Mv had the negative effects on pollen related fertilization.Furthermore,the seed-setting rate was associated with the wheat genotypes.In the all analyzed populations involved in mianyang 26,mianyang 93-124,and SW3243,the transmission frequencies of chromosome 6Mv through male was not significantly different from those through female.However,the transmission frequencies of chromosome 6Mv were significantly correlated with Sichuan wheat genotypes.Additionally,the background of different wheat varieties was also correlated with the transmission frequency of 6Mv in monosomic substitution plants by selfing.The results from this study would provide a theoretical basis for the use of the wheat-Aegilops ventricosa 6Mv/6B substitution line in wheat breeding.

关 键 词：偏凸山羊草 6Mv染色体 普通小麦 配子 传递率 条锈病 

分 类 号：S512.103.4[农业科学—作物学]