高寒地区裸燕麦的核型研究  

Karyotype analysis of naked oats

作　　者：耿帆[1,2] 周青平[3] 梁国玲[2] 贾志锋[2] 刘文辉[2] 丁成翔[2] 刘勇[2] 颜红波[2] 

机构地区：[1]青海大学,青海西宁810016 [2]青海大学畜牧兽医科学院,青海西宁810016 [3]西南民族大学,四川成都610041

出　　处：《青海大学学报（自然科学版）》2014年第6期11-14,共4页Journal of Qinghai University(Natural Science)

基　　金：国家科技部农转资金项目(2013GB200503);青海省青藏高原优良牧草种质资源利用重点实验室;国家科技部科技支撑项目(2011BAD17B05-5)

摘　　要：为燕麦种质的鉴定以及高寒地区裸燕麦的推广、遗传育种提供细胞学理论依据,利用根尖压片法对青引3号莜麦(Avena nuda L.cv.Qingyin No.3)的染色体核型进行了分析。结果表明:青引3号莜麦根尖细胞的染色体数目为2n=42,其中包括11对中部着丝点区染色体和10对近中部着丝点区染色体,其核型公式为2n=6x=42=22 m+20 sm(4SAT),其中第14、第16号染色体短臂末端带有随体。青引3号莜麦染色体的核型属于2B型,这是一种较高级的类型。The study was to provide the cytological theory basis for oats＇ identification,extension and genetic breeding in the alpine- cold region. The chromosome karyotype of root tip cells of Avena nuda L. cv. Qingyin No. 3 was analyzed with squash method. The results of chromosome counting showed that the chromosome number of root tip cells of Avena nuda L. cv. Qingyin No. 3 was 2n = 42,among them there were 11 pairs of metacentric chromosome and 10 paris of submetacentric chromosome. Their karyotype formula is 2n = 6x = 42 = 22 m ＋ 20sm（ 4SAT）,and in the 14 thchromosome and the 16thchromosome＇s short arm ends with satellite. The karyotype of Avena nuda L. cv. Qingyin No. 3 belongs to 2B type,and it＇s an advanced type.

关 键 词：核型分析 裸燕麦 高寒地区 

分 类 号：S512.6[农业科学—作物学]