长毛红山茶和长尾红山茶的核型分析

<正> 长毛红山茶(Camelliav uillosa Chang et S.Y.Liang)和长尾红山茶(C.longicaudata Chang et S.Y.Liang)均为张宏达教授定的新种,分别隶属于山茶属(Camellia)红山茶组(Sect.Camellia)的滇山茶亚组(Subsect.Reficulala)和光果红山茶亚组(Subsect.Lucidissima),前者分布在我国的湖南、广西和贵州,后者分布在广东和广西。 红山茶组共有33个种、1个亚种,7个变种。根据文献资料统计,该组作过染色体计数的有10个种,1个亚种和6个变种,作过核型分析的有4个种、1个亚种和2个变种。本文对该组的长毛红山茶和长尾红山茶的核型作首次报道,并与该组的10个种,1个亚种和6个变种的染色体数目或核型作了比较。

KARYOTYPE ANALYSES IN CAMELLIA VILLOSA AND C. LONGICAUDATA

Camellia villosa Chang et S. Y. Liang and C. longicaudata Chang et S. Y. Liang both are belonging to Sect. Cameliia of the genus Camellia L.. Their chromosome numbers in root tip cells were found to be 30. According to the terminology defined by Levan and al., the respective karyotype formulas of C, villosa and C longicaudata are:K(2n)=30=18m+6sm+2st + 3sm(SC) + 1sm(SC;SAT) K(2n)=30+18m+6sm+2st+3sm(SC)+2sm(SC;SAT)Heterogeneous structures occurred in the homologous chromosomes were observed only in C. villosa. Neither polyploid series nor aneuploid was found in both species. Their chromosome numbers and karyotypes are reported here for the first time.Professor H.T. Changlhaye pointed out that C villosa is morphologically very similar to C. polyodonta. But results obtained through chromosome examination have shown that the karyotype of the former is quite different from that of the latter (K(2n)=30=18m+4sm+2st+6m(SAT)).