大赖草及近缘种染色体C-分带的研究  

Study on Chromosome C banding in Leymus racemosus and Its Related Species

作　　者：王苏玲[1] 齐莉莉[1] 陈佩度[1] 刘大钧[1] 

机构地区：[1]南京农业大学农业部细胞遗传实验室

出　　处：《Acta Botanica Sinica》1999年第3期258-262,共5页Acta Botanica Sinica（植物学报：英文版）

基　　金：国家攻关;863项目

摘　　要：对Ｔｈｉｎｏｐｙｒｕｍｎｂｅｓａｒａｂｉｃｕｍ（Ｓａｖｕｌ．＆Ｒａｙｓ）Ａ．Ｌｖｅ、新麦草（Ｐｓａｔｈｙｒｏｓｔａｃｈｙｓｊｕｎｃｅａ（Ｆｉｓｃｈ．）Ｎｅｖｓｋｉ）和大赖草（Ｌｅｙｍｕｓｒａｃｅｍｏｓｕｓ（Ｌａｍ．）Ｔｚｖｅｌ．）染色体Ｃ分带的核型进行了比较研究。Ｔｈ．ｂｅｓａｒａｂｉｃｕｍ和新麦草的染色体在Ｃ分带带型上有明显的差异，显示了物种的特异性。３个物种的核型表明，Ｃ带带纹主要分布在染色体的末端，大部分染色体不显着丝粒带和中间带。在大赖草染色体上的末端带很明显。一些大赖草的染色体具有与Ｔｈ．ｂｅｓａｒａｂｉｃｕｍ和新麦草某些染色体相似的Ｃ带带型。对大赖草染色体组与Ｔｈ．ｂｅｓａｒａｂｉｃｕｍ和新麦草染色体组的关系进行了讨论。The karyotype analyses with chromosome C banding were carried out in Thinopyrum bessarabicum (Savul. & Rayss.)A. Lve, Psathyrostachys juncea (Fisch.) Nevski and Leymus racemosus (Lam.) Tzvel. The C banding patterns between Th. bessarabicum and P. juncea were distinctively different, indicating the interspecific differentiation. Most of the C bands distributed on chromosome telomere in Th. bessarabicum, P. juncea and L. racemosus , being more prominent in L. racemosus than in Th. bessarabicum and P. juncea. Most chromosomes of the three tested species lacked centromeric bands and intercalary bands. In C banded karyotype of L. racemosus, the banding patterns of some Leymus chromosome were similar to those in Th. bessarabicum and P. juncea. The genome relationships among Th. bessarabicum, P. juncea and L.racemosus were discussed.

关 键 词：新麦草 大赖草 染色体C-分带 核型分析 

分 类 号：Q949.714.2[生物学—植物学]