6个饲用燕麦品种核型分析  

Karyotype analysis of six oat cultivars

作　　者：穆巴拉克·库尔帮 雷映霞 汪辉 周青平 Mubalake·Kuerbang;LEI Yingxia;WANG Hui;ZHOU Qingping(Engineering Lab of Resistant Forage Germplasm Innovation and Ecological Restoration of Degraded Grassland/Research Institute of Qinghai-Tibet Plateau,Southwest Minzu University,Chengdu 610041,Sichuan,China;Chengdu Medical College,Chengdu 610500,Sichuan,China)

机构地区：[1]西南民族大学青藏高原研究院/四川省抗逆牧草种质创新及生态修复工程实验室,四川成都610041 [2]成都医学院,四川成都610500

出　　处：《草业科学》2021年第12期2390-2396,共7页Pratacultural Science

基　　金：国家牧草产业技术体系青藏高原牧草育种岗位(CARS34)。

摘　　要：为较直观地鉴定燕麦(Avena sativa)品种染色体的数目、大小、形态,采用根尖染色体制片法开展6个不同燕麦品种的核型分析研究。结果表明:6个燕麦品种的染色体数量相同,即均为2n=42,为六倍体。其中,‘燕王’的核型公式为2n=6X=26m+16sm(6sat),‘莫妮卡’的核型公式为2n=6X=22m+20sm(4sat),‘枪手’的核型公式为2n=6X=22m(2sat)+20sm(4sat),核型类型属于2B型;‘青海444’的核型公式为2n=6X=28m(4sat)+14sm,‘牧王’的核型公式为2n=6X=22m(2sat)+20sm(2sat),‘骏马’的核型公式为2n=6X=22m(2sat)+20sm(4sat),核型类型属于2A型。6个燕麦品种均含随体。本研究结果可为燕麦种质资源鉴定和遗传育种研究提供细胞学依据。To directly identify the number,size,and morphology of chromosomes in oat(Avena sativa),the chromosome karyotypes of six oat cultivars were analyzed by sectioning the root tips.The results showed that the chromosome number of six oat cultivars was 2n=42,and all tested materials were hexaploids.Among them,the karyotype formula of‘Yan Wang’,‘Monica’,and‘Qiang Shou’was respectively 2n=6X=26m+16sm(6sat),2n=6X=22m+20sm(4sat),and 2n=6X=22m(2sat)+20sm(4sat),belonging to type 2B.The karyotype formula of‘Qinghai 444’,‘Mu Wang’,and‘Jun Ma’was respectively 2n=6X=28m(4sat)+14sm,2n=6X=22m(2sat)+20sm(2sat),and 2n=6X=22m(2sat)+20sm(4sat),and their karyotype type was 2A.All six oat cultivars contained satellites.The results of this study can provide a cytological basis for the identification of oat germplasm resources and research on genetic breeding.

关 键 词：禾本科 染色体 细胞学 随体 着丝点 臂比 六倍体 

分 类 号：S544.9[农业科学—作物学]