【摘要】 葱属粗根组和根茎组６种１１个居群的染色体数目和核型的研究结果如下：Ａ．ｃｙａｔｈｏｐｈｏｒｕｍ：２ｎ＝２ｘ＝１６＝１２ｍ＋４ｓｍ（２ＳＡＴ）。Ａ．ｐｒｚｅｗａｌｓｋｉａｎｕｍ：西藏察雅和四川理县居群分别为２ｎ＝４ｘ＝３２＝２８ｍ＋４ｓｔ（２ＳＡＴ）ａｎｄ２ｎ＝４ｘ＝３２＝２８ｍ＋２ｓｍ＋２ｓｔ（２ＳＡＴ）。Ａ．ｐｏｌｙｒｈｉｚｕｍ：２ｎ＝２ｘ＝２０ｍ＋８ｓｍ＋４ｔ（２ＳＡＴ）。Ａ．ｍｏｎｇｏｌｉｃｕｍ：２ｎ＝２ｘ＝１６＝１４ｍ＋２ｓｔ（２ＳＡＴ）。Ａ．ｓｅｎｅｓｃｅｎｓ：朝鲜郁陵岛和中国内蒙古科尔沁左翼后旗居群分别为２ｎ＝４ｘ＝３２＝２８ｍ＋２ｓｍ＋２ｓｔ（２ＳＡＴ）ａｎｄ２ｎ＝４ｘ＝３２＝２４ｍ＋４ｓｍ＋４ｓｔ（２ＳＡＴ）。Ａ．ｔｕｂｅｒｏｓｕｍ：所研究的四个居群中，山西永济居群为二倍体，２ｎ＝２ｘ＝１６＝１４ｍ＋２ｓｔ（２ＳＡＴ），另三个分别来自四川的理县、汶川玉龙和成都三瓦窑的居群均为四倍体，２ｎ＝４ｘ＝３２＝２８ｍ＋４ｓｔ（２ＳＡＴ）。Ａ．ｐｒｚｅｗａｌｓｋｉａｎｕｍ，Ａ．ｐｏｌｙｒｈｉｚｕｍａｎｄＡ．ｍｏｎｇｏｌｉｃｕｍ的核型为首次报道；并首次在中国发现了Ａ．ｔｕｂｅｒｏｓｕｍ的野生二倍体居群。此?更多还原

【Abstract】 The present paper reports the chromosome numbers and karyotypes of 11 populations of six species of Sect. Bromatorrhiza and Sect. Rhizirideum in Allium (Liliaceae). The results are as follows: A. cyathophorum Bur. et Franch.: 2n=2x=16=12m+4sm(2SAT). A. przewalskianum Regel: 2n=4x=32=28m+4st(2SAT) and 2n=4x=32=28m+2sm+2st(2SAT) respectively from Zhagyab in Xizang and Lixian in Sichuan. A. polyrhizum Turcz. ex Regel: 2n=4x=20m+8sm+4t(2SAT). A. mongolicum Regel: 2n=2x=16=14m+2st(2SAT). A. senescens L.: 2n=4x=32=28m+2sm+2st(2SAT) and 2n=4x=32=24m+4sm+4st(2SAT) respectively from Ulrung do (DPRK) and Horqin Zuoyi Houqi,Nei Monggol. A. tuberosum Rottl. ex Spreng.: Four populations of this species were studied. One from Yongji in Shanxi is diploid with 2n=2x=16=14m+2st(2SAT) and the other three populations respectively from Lixian, Yulong and Sanwayao in Sichuan are all tetraploid with 2n=4x=32=28m+4st(2SAT). The chromosome numbers and karyotypes of A. przewalskianum, A. polyrhizum and A. mongolicum are reported here for the first time. The wild diploid population of A. tuberosum is found here for the first time in China. In additon, the origin of cultivated A. tuberosum and the karyotypical differentiations among the populations of A. cyathophorum, A. przewalskianum and A. senescens are discussed.更多还原