【摘要】 采用常规根尖压片法对西南地区的10种(变种)野生树莓染色体数和核型进行研究。结果表明,除寒莓Rubus buergeri 2n=8x=56,光滑高粱泡R.lambertianus var.glaber、大乌泡R.multibracteatus和川莓R.setchuenensis 2n=4x=28以及茅莓R.parvifolius2n=2x=14、2n=3x=21和2n=4x=28与2n=2x=14外,其余5种(变种)的染色体数均为2n=2x=14;核型结果表明除栽秧泡R.ellipticus var.obcor-datus核型分类为2A外,其余均为1A类型,它们的核型公式是:红泡刺藤R.niveus,2n=2x=14=14m;栽秧泡R.ellipticusvar.obcordatus,2n=2x=14=12m(2SAT)+2sm(2SAT);茅莓,2n=2x=14=14m(2SAT)、2n=3x=21=21m(3SAT)和2n=4x=28=24m+4sm(4SAT)与2n=2x=14=12m+2sm(2SAT);秀丽莓R.amabilis,2n=2x=14=12m(2SAT)+2sm;插田泡R.coreanus,2n=2x=14=14m(2SAT)和2n=2x=14=14m;山莓R.corchorifolius,2n=2x=14=14m;光滑高粱泡,2n=4x=28=24m+4sm;大乌泡,2n=4x=28=24m+4sm;川莓,2n=4x=28=28m;寒莓,2n=8x=56=56m。栽秧泡和秀丽莓2个种(变种)的染色体数、茅莓存在二倍体与四倍体的混倍体类型以及红泡刺藤、栽秧泡、秀丽莓、山莓、光滑高粱泡、大乌泡、川莓和寒莓8个种(变种)的核型为首次报道。更多还原

【Abstract】 Chromosome numbers and karyotypes of 10 wild bramble(Rubus L.)species(varieties)from Southwest of China had been studied by using common root-tip squashing method.The results showed that they were all diploidy with 2n=2x=14,but R.buergeri with 2n=8x=56,R.lambertianus var.glaber,R.multibracteatus and R.setchuenensis with 2n=4x=28,and R.parvifolius with a ploidy series of 2n=2x=14,2n=3x=21 and the mixoploid of 2n=4x=28 and 2n=2x=14.The results showed also that all the karyotypes belonged to"1A" type,but"2A" type in R.ellipticus var.obcordatus,their karyotype formulae were as follows:R.niveus,2n=2x=14=14m;R.ellipticus var.obcordatus,2n=2x=14=12m(2SAT)+2sm(2SAT);R.parvifolius,2n=2x=14=14m(2SAT),2n=3x=21=21m(3SAT),2n=4x=28=24m+4sm(4SAT)and 2n=2x=14=12m+2sm(2SAT);R.amabilis,2n=2x=14=12m(2SAT)+2sm;R.coreanus,2n=2x=14=14m(2SAT)and 2n=2x=14=14m;R.corchorifolius,2n=2x=14=14m;R.lambertianus var.glaber,2n=4x=28=24m+4sm;R.multibracteatus,2n=4x=28=24m+4sm;R.setchuenensis,2n=4x=28=28m;R.buergeri,2n=8x=56=56m.Among them,it was reported firstly that the chromosome numbers of two species R.ellipticus var.obcordatus and R.amabilis,the mixoploid forms of 2x and 4x in R.parvifolius and karyotypes of the 8 species R.niveus,R.ellipticus var.obcordatus,R.amabilis,R.corchorifolius,R.lambertianus var.glaber,R.multibracteatus,R.setchuenensis and R.buergeri.更多还原