北京林业大学学报2012，Vol.34Issue(2)：118-124,7.
异源三倍体百合减数分裂染色体行为的研究
Meiotic chromosome behavior in allotriploid cultivar of Lifium hybrids.
摘要
Abstract
The meiosis process and pollen vitality of Longiflorum x Asiatic hybrid ＇ Bonsoir＇ （2n = 3x = 36） were studied by eytogenetie methods. The results showed that 64.31% pollen grains were viable, and sizes of the viable pollen grains ranged from 986.33 to 3 491.68 μm2, with a bimodal frequency distribution. During meiosis, some phenomena resulted in sterile pollen grains, such as the irregular chromosome associations in meiosis propbase, lagging chromosomes, chromosome bridges, unbalanced segregation, mieronucleus, etc. Abnormal orientation of metaphase I[ spindles contributed to production of dyads and triads, which produced unredueed mierospores, such as fused spindles and triangle spindles. But parallel and vertical orientation of spindles was not connected with dyad formation. Concerning the eytokinesis, in some pollen mother eells（PMCs） , a failure of the reductional wall led to monads, dyads and triads, and finally increased the rate of unreduced pollens. The perspective of this allotriploid in the polyploidy breeding program of Lilium was discussed.关键词
百合/异源三倍体/小孢子母细胞/减数分裂/胞质分裂Key words
Lilium/allotriploid/pollen mother cell/meiosis/cytokinesis分类
农业科技引用本文复制引用
封紫,魏迟,贾桂霞..异源三倍体百合减数分裂染色体行为的研究[J].北京林业大学学报,2012,34(2):118-124,7.基金项目
国家自然科学基金项目（31071819）、“十一五”国家科技支撑计划项目（2009BADB8804）. （）
