乳源白毛茶和台山白云茶的细胞学研究

广东乳源白毛茶和台山白云茶是２个具有地方特色的茶树品种。染色体组型分析结果表明，这２个茶树品种均为二倍体（２ｎ＝２ｘ＝３０），但存在染色体数目变异。特别是在乳源白毛茶品种中发现了１个单倍体细胞（ｘ＝１５）。２个茶树品种的核型均为２ｎ＝２ｘ＝３０＝１６ｍ＋６ｓｍ＋４ｓｍ＾ｓａｔ＋４ｓｔ。根据核型分析结果，认为这２个茶树 起源时间相对较晚、较进化的品种。

CYTOLOGICAL STUDIES ON TWO GUANGDONG TEA VARIETIES

Karyotype analyses of two Guangdong tea varieties, i.e. Ruyuan Baimao and Taishan Baiyun,which have local feature of Guangdong, were conducted. The results showed that the two varieties were of diploids( 2n=2x =30) though cells with fewer than 30 chromosomes were observed. Particularly a haploid cell in Ruyuan Baimao variety was observed. The karyotype symmetry analysis showed that the two varieties originated and evolved comparatively later than many other tea varieties.