摘要
对小金海棠、变叶海棠居群内分化出的似小金海棠的植株、变叶海棠×陇东海棠(似小金海棠)、陇东海棠、变叶海棠进行了AFLP分析。结果表明:小金海棠、变叶海棠居群内分化出的似小金海棠的植株和变叶海棠×陇东海棠(似小金海棠)具有高度的遗传一致性,相似性系数为0·977～0·986;小金海棠与陇东海棠和变叶海棠之间有相近的亲缘关系,小金海棠的谱带有98·08%是来自于变叶海棠和陇东海棠的叠加。该研究表明小金海棠是变叶海棠物种分化及陇东海棠种质渗入所形成的多倍体杂种。
This study analyzed Malus xiaojinensis Cheng et Jiang, apple trees were similar to Malus xiaofinensis Cheng et Jiang differentiated from M. toringoides Hughes, M. toringoides Hughes × M. kansuensis Rehd. , M. kansuensis Rehd. , M. toringoides Hughes by AFLP to explore the origin of M. xiaojinensis Cheng et Jiang. There were high degree of genetic identity among M. xiaojinensis Cheng et Jiang, apple trees were similar to M. xiaojinensis Cheng et Jiang differentiated from M. toringoides Hughes and M. toringoides × Hughes M. kansuensis Rehd. , and their genetic similar coefficient were from 0. 977 to 0. 986. M. xiaojinensis Cheng et Jiang, meanwhile there were 98.08% bands of M. xiaojinensis Cheng et Jiang were from M. kansuensis Rehd. and M. toringoides Hughes. The results showed that M. kansuensis Rehd. and M. toringoides Hughes had close relationship. According to the AFLP analysis and previous research, we discussed the origin of M. xiaojinensis Cheng et Jiang and proposed that the species may derive from M. toringoides Hughes × M. kansuensis Rehd. Our findings have provided basic research data and important directions for the cultivation and exploitation of the M. xiaojinensis.
出处
《园艺学报》
CAS
CSCD
北大核心
2008年第2期281-284,共4页
Acta Horticulturae Sinica
基金
国家自然科学基金项目(30471206)
关键词
小金海棠
AFLP
遗传一致性
相似性系数
起源
杂交
Malus xiaojinensis Cheng et Jiang
AFLP
genetic identity
genetic similar coefficient
origin
hybrid
