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以6个A基因组香蕉(Musaspp.)品种为材料,采用改良的去壁低渗法对其核型特征进行分析。‘天宝蕉’(AAA)核型公式为2n=3x=33=3M+27m(3SAT)+3sm,属“1A”核型;‘海南贡蕉’(AA)核型公式为2n=2x=22=2M+18m(2SAT)+2sm,属“2A”核型;‘玫瑰蕉’(AA)、‘贡蕉’(AA)、‘抗枯1号’(AAA)和‘抗枯5号’(AAA)核型公式分别为2n=2x=22=2M+16m(SAT)+2sm+2st,2n=2x=22=4M+16m(SAT)+2sm,2n=3x=33=6M+15m(3SAT)+12sm和2n=3x=33=6M+15m(3SAT)+12sm(3SAT),属“2B”核型。基于核型分析结果,绘制了6个香蕉品种的核型模式图。
The karyotype characteristics of six A genome banana (Musaspp.) Cultivars were analyzed by the improved wall - down hypotonic method. The karyotype formula of AAA is 2n = 3x = 33 = 3M + 27m (3SAT) + 3sm, which belongs to the “1A ” karyotype. The karyotype of Hainan Gongon (AA) is 2n = 2x = 22 = 2M + 18m (2SAT) +2 sm, belonging to the “2A ” karyotype; “AA”, “AA”, “AAA” and “ (AAA) karyotype formulas are respectively 2n = 2x = 22 = 2M + 16m (SAT) + 2sm + 2st, 2n = 2x = 22 = 4M + 16m (SAT) + 2sm, 2n = 3x = 33 = 6M + 15m (3SAT) + 12sm and 2n = 3x = 33 = 6M + 15m (3SAT) + 12sm (3SAT), belonging to the ”2B" karyotype. Based on the results of karyotype analysis, karyotype patterns of six banana cultivars were drawn.