拟鹅观草属3种植物的核型研究(英文)  

Karyotypes of Three Taxa in Pseudoroegneria(Poaceae:Triticeae)

作　　者：于海清[1,2] 丁春邦[1] 周永红[1] 

机构地区：[1]四川农业大学小麦研究所,四川都江堰611830 [2]泸州医学院医学分子生物学实验室,四川泸州646000

出　　处：《西北植物学报》2009年第8期1590-1594,共5页Acta Botanica Boreali-Occidentalia Sinica

基　　金：国家自然科学基金(30670150,30470135)

摘　　要：对禾本科小麦族拟鹅观草属物种Pseudoroegneria geniculata、P.geniculata ssp. scythica和P.geniculata ssp. pruinifera的核型进行了研究。结果显示:P.geniculata和P.geniculata ssp. scythica为四倍体物种,P.geniculata ssp. pruinifera为六倍体物种;P.geniculata、P.geniculata ssp. scythica和P.geniculata ssp. pruinif-era的核型公式分别为2n=4x=28=18 m(2sat)+10sm(2sat)、2n=4x=28=28 m(2sat)和2n=6x=42=36 m(6sat)+6sm(2sat);P.geniculata和P.geniculata ssp. pruinifera为2A核型,而P.geniculata ssp. scythica为1A核型。研究表明:3种植物的核型存在差异;P.geniculata ssp. pruinifera的核型为首次报道,其核型明显不同于P.geniculata和P.geniculata ssp.scythica。The karyotypes of Pseudoroegneria geniculata ,P. geniculata ssp. scythica and P. geniculata ssp. pruinifera were studied. The results indicated that： P. geniculata and P. geniculata ssp. scythica were tetraploids,while P. geniculata ssp. pruinifera was hexaploid; The karyotype formulas of P. geniculata, P. geniculata ssp. scythica and P. geniculata ssp. pruini fera were 2n=4x=28=18m（2sat） ＋10sm（2sat）, 2n=4x=28=28m（2sat） and 2n=6x=42=36m（6sat）＋6sm（2sat）,respectively;The karyotype of P. geniculata and P. geniculata ssp. pruinifera were 2A types, while P. geniculata ssp. scythica was 1A type. This demonstrated that there were variations among the kayotypes of the three taxa;The kayotype of P. geniculata ssp. pruinifera was first reported,and was obviously different to that of P. geniculata and P. geniculata ssp. scythica.

关 键 词：核型 拟鹅观草属 PSEUDOROEGNERIA geniculata P.geniculata ssp.scythica P.geniculata ssp.pruinifera 

分 类 号：Q343.22[生物学—遗传学]