不同种属间代换系杂交后代减数分裂行为的研究  

STUDY ON MEIOSIS COMPARISON OF POLLEN GRAIN OF F_1 HYBRIDED BY GAMETOCIDAL SUBSTITUTION LINES AND WHEAT

作　　者：邢璐璐[1] 陈霞[1] 徐英博[1] 李集临[1] 

机构地区：[1]哈尔滨师范大学

出　　处：《哈尔滨师范大学自然科学学报》2008年第3期66-68,共3页Natural Science Journal of Harbin Normal University

基　　金：国家自然科学基金项目(39870417)

摘　　要：用来自拟斯卑尔脱山羊草(Ae.speltoides)的杀配子染色体2S(2S染色体带有GC基因),诱导普通小麦—黑麦(Secale.cereale L)二体代换系(5R/5A)的染色体断裂,观察杂种F1的减数分裂行为,在减数分裂中期Ⅰ和中期Ⅱ均出现较高频率的单价体、多价体,后期I和后期Ⅱ出现大量的落后染色体、染色体断片和桥等异常现象,在二分孢子和四分孢子中出现较多的微核.因此,利用带有杀配子染色体的代换系间杂交来诱导染色体易位是一条有效的途径.The study uses the gametocidal chromosome 2S derived from Ae. speltoides , inducing chromosonie breaks in Triticum aestivum ningnong and 5R/SA wheat - rye substitution lines. Observation of the meiosis of the hy-brid F1 , in metaphase Ⅰ and Ⅱ, there are appearing the high - frequency of univalents and muhivalents ; in anaphase Ⅰ and Ⅱ , there are forming many chromosomal abnormalities such as a large number of lagging chromosomes, chromosomal fragments and chromosomal bridges;in dispores and tetraspores, there exist micronucleus. Therefor, the use of the function on inducing chromosome translocafion between different substitution is an elfective way.

关 键 词：杀配子染色体 代换系 减数分裂 

分 类 号：S666[农业科学—果树学] S512.1[农业科学—园艺学]