加拿大披碱草和圆柱披碱草BC_1植株的细胞遗传学鉴定(英文)  

Identification of Chromosome and Fertility of BC_1 between Elymus canadensis and E.cylindricus

作　　者：马艳红[1] 于卓[1] 李小雷[1] 李晓宇[1] 李造哲[1] 

机构地区：[1]内蒙古农业大学农学院,呼和浩特010019

出　　处：《西北植物学报》2008年第11期2184-2188,共5页Acta Botanica Boreali-Occidentalia Sinica

基　　金：国家重点基础研究发展计划(973计划)项目(2007CB108901);国家自然科学基金(30560100)

摘　　要：以加拿大披碱草(2n=4x=28)和圆柱披碱草(2n=6x=42)为材料,对其BC1植株染色体数目、配对构型以及花粉育性和结实性等进行了鉴定。结果显示:BC1代85%以上细胞染色体数目为28条(2n=4x=28);BC1植株的花粉母细胞减数分裂中期Ⅰ染色体配对行为较规则,其平均染色体构型分别为0.04Ⅰ+13.98Ⅱ,且环状二价体多于棒状二价体;BC1植株的花粉可育率和自然结实率分别为84.83%和70.98%,说明BC1植株的育性已得到恢复,为其后代优良株系的选育奠定了基础。With Elymus canadensis L. （2n=4x=28） and Elyrnus cylindricus （Franch.） Honda （2n=6x= 42） as tested plants, the chromosome number, chromosome pairing configuration, pollen fertility and seed set of BC1 were analyzed. The results showed that the chromosome numbers in above 85% root tip cell of BC1 plant are 28,which are tetraploid（2n=4x= 28） ;the chromosome pairing behavior at metaphase Ⅰ in pollen mother cells of BC1 plant are regular,and the average chromosome pairing configurations are 0.04 Ⅰ＋13.98Ⅱ ,and the frequency of ring bivalent was obviously more than rod bivalent;the pollen fertility and the seed set of BC1 plant are 84.83%and 70.98%respectively. It was proved that the fertility of BC1 plant had been restored. The above results provide a basis for selection and breeding of progenies.

关 键 词：加拿大披碱草 圆柱披碱草 BC1植株 染色体 育性 

分 类 号：Q343.24[生物学—遗传学]