中国大戟属13种15个居群的核型报道

摘要

对国产大戟科Euphorbiaceae大戟属Euphorbia的13种15个地方居群的核型进行研究, 以期为解决该属的种间亲缘关系和物种进化机制提供依据.结果如下: 地锦E. humifusa (望江居群), 2n=2x=22=20m (2SAT)+2sm;地锦E. humifusa (红旗村居群), 2n=2x=22=18m+4sm;千根草E. thymifolia, 2n=4x=40=40m;斑地锦E. maculata, 2n=4x=40=36m+4sm;银边翠E. marginata, 2n=8x=56=40m+ 8sm+8st;铁海棠E. milii, 2n=4x=40=32m+8sm;金刚纂E. neriifolia, 2n=6x=60=6m+36sm+12st+6t;火殃勒E. antiquorum, 2n=6x=60=24m+24sm+12st;一品红E. pulcherrima, 2n=4x=28=24m(3SAT)+4sm;猩猩草E. cyathophora, 2n=4x=28=16m+12sm;齿裂大戟E. dentata, 2n=4x=28=28m;续随子E. lathyris, 2n=2x=20=12m+8sm;泽漆E. helioscopia, 2n=6x=42=36m+6sm;乳浆大戟E. esula (陈家沟居群), 2n=2x=20=14m+6sm;乳浆大戟E. esula (樱桃沟居群), 2n=4x=40=32m+8sm.千根草和斑地锦两个种的核型以及乳浆大戟的四倍体居群核型均为首次报道.