结球甘蓝减数分裂中染色体异常行为分析  

Analysis on Chromosome Abnormal Behavior in Meiosis of Brassica oleraces var. Capitata L.

作　　者：邵治亮[1] 

机构地区：[1]榆林学院生命科学学院,陕西榆林719000

出　　处：《安徽农业科学》2009年第30期14653-14655,共3页Journal of Anhui Agricultural Sciences

基　　金：陕西省科技计划项目(07JK447)

摘　　要：对300多个纯合二倍体结球甘蓝花粉母细胞减数分裂各时期的染色体进行观察,发现自然条件下纯合二倍体甘蓝花粉母细胞在减数分裂的双线期、终变期以及中期Ι出现了高频率的1～3个四价体和中期Ι有高频率的1～3对染色体提早分离和滞后分离2种异常现象,探讨了甘蓝结实率不高与染色体异常行为之间的关系。The chromosomes from more than 300 pollen mother cells of homozygous diploid of Brassica oleraces vat. Capitata L. were observed in every period of meiosis. It was found that altofrequent 1 - 3 quadrivalent appeared in diplotene, diakinesis and metaphase I of meiosis of pollen mother cells of B. oleraces var. Capitata under natural conditions, and 2 kinds of abnormal phenomenas such as altofrequent 1 - 3 pairs of chromosomes separated early or late in metaphase I of meiosis. The relationship between low seed setting rate of B. oleraces var. Capitata and chromosome abnormal behavior was explored.

关 键 词：结球甘蓝 减数分裂 异常行为 结实率 

分 类 号：S635.1[农业科学—蔬菜学]