摘要
为了解新种质芡欧鼠尾草与鼠尾草属常见植物一串红、一串蓝之间的亲缘关系,并为其远缘杂交和遗传改良提供基础,本实验在细胞遗传学水平,对鼠尾草属芡欧鼠尾草、一串红、一串蓝3种植物染色体核型进行分析。结果显示,芡欧鼠尾草二倍体体细胞染色体数目为12条,核型公式是2n=12=2m+2sm+8st,核型不对称系数(AS.K%)为74.9%,核型分类标准属于"3A"型;一串红二倍体体细胞染色体数目为44条,核型公式是2n=44=34m+2sm+8st,核型不对称系数(AS.K%)为62.4%,核型分类标准属于"2A"型;一串蓝二倍体体细胞染色体数目为18条,核型公式是2n=18=12m+6sm,核型不对称系数(AS.K%)为59.0%,属于"2A"型。通过核型分析,芡欧鼠尾草、一串红、一串蓝的染色体具有明显的差异性,所以认为这3种鼠尾草属植物的亲缘关系较远。
The aim was to investigate the genetic relationship between a new introduced germplasm（Salvia hispanica L.） and other two common members of Salvia L.family（Salvia splendens Ker-Gawler and Salvia farinacea）,and provide the theoretic foundation for distant hybridization and genetic improvement in these three germplasms.In cytogenetics level,karyotypes of Salvia hispanica L.,Salvia splendens Ker-Gawler and Salvia farinacea were discussed in this paper.The results showed that chromosome number of normal diploid of Salvia hispanica L.was 2n=12,karyotype formula was 2n=12=2m＋2sm＋8st,the AS.K% was 74.9%,which belonged to ＇ 3A ＇ type;chromosome number of normal diploid of Salvia splendens Ker-Gawler.was 2n=44,karyotype formula was 2n=34m ＋ 2sm ＋ 8st,the AS.K% was 62.4%,which belonged to ＇ 2A ＇ type;and chromosome number of normal diploid of Salvia farinacea.was 2n=18,karyotype formula was 2n=12m＋6sm,AS.K% was 59.0%,which belonged to ＇ 2A ＇ type.Through the karyotype analysis,there were great differences of chromosomes between Salvia hispanica L.,Salvia splendens Ker-Gawler and Salvia farinacea,thus these three members of Salvia L.family had a distant relationship.
出处
《中国农学通报》
CSCD
北大核心
2011年第27期250-254,共5页
Chinese Agricultural Science Bulletin
基金
湖南省财政厅科技专项"芡欧鼠尾草引种关键技术及其作为营养食品的开发应用"(50262/62020410016)
湖南省大学生研究性学习与创新实验计划项目"芡欧鼠尾草多倍体诱导的研究"(DFCXS201107)
关键词
芡欧鼠尾草
一串红
一串蓝
核型分析
亲缘关系
Salvia hispanica L.
Salvia splendens Ker-Gawler.
Salvia farinacea.
karyotype
genetic relationship
