几种重楼的染色体核型研究

作者对重楼属(Paris)的几个种:球药隔重楼(P.fargesii),毛重楼(P.mairei),花叶重搂(P.marmorata),黑籽重楼(P.thibetica),海南重楼(P.dunniana),巴山重搂(P.bashanensis),以及多叶重楼(P.polyphylla)的两个变种狭叶重楼(var.stenophylla)和华重楼(var.chinensis)的染色体核型进行了研究,发现种间及种内不同居群(population)间的核型都存在不同程度的差别。核型简式为:球药隔重楼K(2n)=2x=10=6m+2t(SAT)+2t+3bs,毛重楼K(2n)=2x=10=6m+4t+1bs,花叶重楼K(2n)=2x=10=6m+4t,黑籽重楼K(2n)=2x=10=2m+4m(SAT)+4t,海南重楼K(2n)=2X=10=6m+2t(SAT)+2t,巴山重楼K(2n)=2x=10=6m+4st,狭叶重楼K(2n)=2x=10=6m+1st+3t,华重楼K(2n)=2x=10=6m+4t。

KARYOTYPE STUDIES IN EICHT TAXA OF PARIS

Karyotypes in eight of Paris, namely, P. fargesii, P. mairei, P. thibetica, P. dunniana, P. bashanensis, P. marmorata, P. polyphylla var. stenophylla and P. polyphylla var. chinensis, were studied. The karyotypes can be formulated as follows. P. fargesii K(2n) = 2x=10 = 6m+2t (SAT) + 2t+3bs; P. mairei K (2n) =2x = 10 = 6m+4t+lbs, P. thibetica, K(2n) = 2x = 10 = 2m+4m(SAT)+4t; P. dunniana K(2n) = 2x=10 = 6m+2t (SAT) + 2t; P. bashanensis, K(2n) = 2x=10 = 6m+4st; p, marmorata K(2n) r=2x=10 = 6m+4t; P. polyphylla var. stenophylla K(2n) = 2x=10 = 6m+ 1st + 3t; and P. polyphylla var. chinensis, K(2n) = 2x=10 = 6m+4t. Paris polyphylla var. chinensis showed same chromosome number but somewhat different karyotype from those previously reported. Although P. fargesii showed same chromosome number to the previous report, its karyotype is reported here for the first time. Then, the chromosome numbers and karyotypes of the other six taxa were all studied for the first time. All taxa discussed had similar karyotypes, although each had somewhat distinct and variable karyotype.