红原县引种早熟与晚熟猫尾草的核型分析  

The Karyotypical Analysis of Introduction Prematurity and Late-maturity Phleum pratense L.in Hongyuan County,China

作　　者：周卫生[1] 吴宁[2] 

机构地区：[1]四川大学生命科学学院,成都610064 [2]中国科学院成都生物研究所,成都610041

出　　处：《四川大学学报（自然科学版）》2012年第2期484-488,共5页Journal of Sichuan University(Natural Science Edition)

基　　金：国家重点基础研究发展规划(2005CB422006);国家自然科学基金(30972350)

摘　　要：对红原县引种早熟与晚熟猫尾草(Phleum pratense L.)细胞染色体进行核型分析.研究表明,早熟猫尾草染色体数为2n=28,染色体的核型为K(2n)=2n=4x=28=22m+4sm(SAT)+2st(SAT),其中第5、11对染色体为近中部着丝粒染色体,第8对染色体为亚端部着丝粒染色体,其余各对染色体为中部着丝粒染色体,第8对染色体携带随体;晚熟猫尾草染色体数为2n=42,染色体的核型为K(2n)=2n=6x=42=2M+24m+14sm+2sm(SAT),其中第3、4、6、11、12、13、14、20对染色体为近中部着丝粒染色体,第18对染色体为正中部着丝粒染色体,第22号为B染色体,其余各对染色体为中部着丝粒染色体,第11对染色体携带随体.早熟与晚熟猫尾草都属2A核型.The karyotypes of metaphase chromosomes of introduction prematurity and latematurity Phleum pratense L. were analysed in Hongyuan County, China. The result showed that chromosome number of prematurity Phleum pratense L. was 2n=28. The karyotype of prematurity Phleum pratense L. was K（2n） = 4x=28=22m＋4sm（SAT）d-2st（SAT）, the fifth, eleventh pairs were subtelocentric chromosomes, the eighth pairs were submetacentric chromosomes, and the rest pairs were metacentric chromosomes, the eighth pairs chromosomes with satellite were observed~ chromosome number of late- maturity Phleum pratense L. was 2n = 42. The karyotype of prematurity Phleum pratense L. was K （2n） =6x=42=2M＋24m ]-14sm＋2sm（SAT） ,the third, fourth, sixth, eleventh, twelfth, thirteenth, fourteenth, twentieth pairs were subtelocentric chromosomes, the eighteenth pairs were median metacentric chromosomes, twenty second chromosome was B chromosome, and the rest pairs are metacentric chromosomes, the eleventh pairs chromosomes with satellite were observed. Karyotypes of prematurity and latematurity Phleum pratense L. belong to Stebbins＇s 2A type.

关 键 词：猫尾草 早熟 晚熟 染色体 核型 

分 类 号：Q243[生物学—细胞生物学]