中国春—山羊草2C二体附加系同中国春—偃麦草二体附加系杂交后代的细胞遗传学研究  

Cytogenetic Studies on the Cross-progenies Between Chinese Spring-Agilops 2C Disomic Addition and Chinese Spring-Elytriga Disomic Addition

作　　者：刘凤歧[1] 曲敏[1] 张延明[1] 张雪亭[1] 李集临[1] 

机构地区：[1]哈尔滨师范大学生物系,哈尔滨150025

出　　处：《植物研究》2007年第1期89-93,共5页Bulletin of Botanical Research

基　　金：国家自然科学基金资助项目(No.39870417)

摘　　要：对中国春—长穗偃麦草(E.elongata2n=14EE)二体附加系(1E-7E)与中国春—柱穗山羊草(Ae.cylindrica2n=28CCDD)2C二体附加系杂交后代进行细胞遗传学研究。结果表明,杂交当代(1E-7E)的结实率最高为36.06%,最低为19.43%,平均为29.5%。F1自交结实率最高为62.09%,最低为30.92%,平均为39.64%。对照实验和方差分析表明,杀配子染色体对不同品系杂交的结实率影响有差异。杂交F1减数分裂观察,看到F1单价体数超过理论数值,后期出现大量的染色体片段,认为这种异常现象与杀配子染色体的作用有关。The cytogenetics of the cross-progenies between Chinese Spring-Agilops 2C disomic addition and Chinese Spring-Elytriga disomic addition were studied. The results showed that The highest seedsetting of crossing generation is 36.06%, the lowest is 19. 43% and average is 29.5%. The highest seed-setting of F1-selfed is 62. 09%, the lowest is 30. 92% and average is 39.64%. the control experiment and analysis of variance showed that the gametocidal chromosome effected on the difference of seed-set rate of hybridization in different lines. After scrutinizing the meiosis of pollen mother cells （PMS） in F1 hybrids, the results were concluded ： the number of univalents exceeded the expected and some trivalents and tetravalents appeared at the same time. These were mainly caused by the gametocidal chromosome 2C.

关 键 词：杀配子染色体 附加系 结实率 减数分裂 

分 类 号：S512.103[农业科学—作物学]