摘要
选用4个不同株形和花色的勋章菊品种进行染色体核型分析,结果表明:(1)勋章菊品种‘红纹’、‘星白’、‘日出’的体细胞染色体数均为2n=10,而‘中国勋章菊’为2n=20,推测勋章菊属植物的染色体基数为x=5,而‘中国勋章菊’为四倍体。(2)‘红纹’、‘星白’、‘日出’的核型公式分别为2n=8m+2sm、2n=8m+2sm和2n=10m;‘中国勋章菊’的核型公式为2n=18m+2sm。(3)4个勋章菊品种的核型不对称系数为53.80%~58.84%;除‘日出’的核型类型为"1A",其余3个品种均为"2A"型,核型较对称。(4)从染色体核型分析结果可知,3个外引品种的亲缘关系较近。
Four different types and colors of Gazania varieties were chosen to chromosomes karyotype analysis. The results showed that:(1) The number of somatic chromosomes of G. rigens varieties ‘Hongwen',‘Xingbai'and‘Richu'were 2n = 10,‘Zhongguo Xunzhangju'was 2n = 20. It is speculated that the cardinal number of chromosomes in G. rigens plants was x = 5,while the‘Zhongguo Xunzhangju'was tetraploid.(2) The karyotype formulae of‘Hongwen',‘Xingbai'and‘Richu'respectively were 2n = 8m + 2sm,2n = 8m + 2sm and 2n = 10 m. The karyotype formula of‘Zhongguo Xunzhangju'was 2n = 18 m + 2sm.(3) The asymmetrical karyotype coefficient of four G. rigens varieties were 53.80%–58.84%. Except the karyotype type of‘Richu'was"1A",the three remaining species were"2A",and the karyotypes were relatively symmetric.(4) The results of karyotype analysis showed that three introduced species had a near genetic relationship.
出处
《园艺学报》
CAS
CSCD
北大核心
2015年第12期2512-2518,共7页
Acta Horticulturae Sinica
基金
苏州市科技支撑计划(农业)项目(SNG201409)
关键词
勋章菊
染色体
核型分析
Gazania rigens
chromosome
karyotype analysis