论文部分内容阅读
采用去壁、低渗、火焰干燥制样法分析了18个茶树品种的染色体组型,结果表明:茶树染色体以 X=15为基数,一般为二倍体,但也有非整倍体和多倍体细胞。不同品种、同一品种不同细胞的染色体组型不尽相同,其主要核型为2n=2x=30=18m+6sm+2sm~(sat)+4st~(sat)和2n=2x=30=18m+6sm+4sm~(sat)+2st~(sat)。根据组型分析结果,认为茶树起源于我国的西南地区,其品种间具有相近的亲缘关系,乔木型、大叶品种核型的对称性较高,是进化上较原始的品种。
The chromosome constitutions of 18 tea cultivars were analyzed by wall-removing, hypotonic and flame-drying methods. The results showed that the chromosomes of tea plants were diploid on the basis of X = 15, but aneuploid and multiples Somatic cells. The karyotypes of different varieties and different cells of the same species are different. The main karyotypes are 2n = 2x = 30 = 18m + 6sm + 2sm ~ sat + 4st ~ sat and 2n = 2x = 30 = 18m + 6sm + 4sm ~ (sat) + 2st ~ (sat). According to the results of the grouping analysis, the tea tree originated from southwestern China and its genetic relationship was similar among cultivars. The archetype of arborous and large-leaved cultivars was more symmetrical and more evolutionarily primitive.