糯玉米杂交种孤雌生殖后代的形态和细胞学研究  

Morphological and Cytological Study on the Parthenogenic Progenies of Stick Maize Hybrid

作　　者：单智超[1] 王德新[1] 荆毅[1] 薛兵东[1] 苗相伟[1] 

机构地区：[1]丹东农业科学院,辽宁凤城118109

出　　处：《玉米科学》2008年第3期86-89,共4页Journal of Maize Sciences

摘　　要：以不同浓度DMSO(二甲基亚砜)诱导得到的糯玉米杂交种孤雌生殖Pa1代和Pa2代为材料,研究糯玉米孤雌生殖后代的植株形态变化、细胞学行为变化和染色体数目的变异。研究结果表明,Pa1代的植株在表现型上基本整齐一致,但植株呈现退化。DMSO诱导玉米孤雌生殖除获得纯合二倍体植株外,还获得了部分的混倍体,细胞染色体有丝分裂细胞学行为也相对有较大的变异。Pa2代根尖体细胞染色体数目及有丝分裂细胞学行为变异均小于Pa1代。Basing on Pal and Pa2 generations plants, which originating from glutinous maize parthenogenesis induced by different content DMSO （dimethyl sulphoxide）. The plant morphologic character, cytology behavior variation and chromosome numbers variation were studied. The research result showed that the phenotype of Pal generation plants was kept in a similar level. However, compared with their parents, these plants showed some degeneration. Aside from pure diploid plants, mixoploid plants also were obtained by inducing of DMSO. Furthermore, there was much cytology behavior variation of mitosis between pure diploid and mixoploid plants. Both Pa2 generation plants root apexes＇ chromosome numbers and cytology behavior variation were less than Pal generation＇s.

关 键 词：糯玉米 孤雌生殖 有丝分裂 染色体 变异 

分 类 号：S513[农业科学—作物学]