马家柚遗传来源鉴定与适宜授粉品种筛选

Identification of Majia pomelo germplasm and screening of varieties with suitable pollination

为探究马家柚及原产地周边主要柚类株系遗传关系和来源并筛选出适宜授粉株系,利用SSR分子标记技术对江西省广丰县及周边地区共46份柚资源进行遗传关系鉴定,并对不同杂交授粉组合的马家柚进行连续2 a的果实品质相关指标分析。结果表明:马家柚在长期实生繁殖与人工选择过程中发生了明显变异,极有可能由广丰及周边地区的本地土柚经长期自然与人为的双向选择衍变而来;不同杂交授粉组合中以土柚4号对马家柚果实品质提升效果最佳,为目前马家柚较为适宜的授粉父本株系。

A total of 46 pomelo resources in Guangfeng County and its surrounding areas of Jiangxi Province were identified by SSR molecular marker technique to explore the genetic relationship and origin of Majia pomelo and its main pomelo lines around its origin,and to screen varieties with suitable pollination.The fruit quality-related indexes of Majia pomelo with different cross-pollination combinations were analyzed for two consecutive years.The results showed that Majia pomelo had obvious variation during the long-term seed reproduction and artificial selection.It is most likely derived from the local pomelo in Guangfeng and its surrounding areas through long-term natural and artificial selection.Among the different crosspollination combinations,native pemolo No.4 has the best effect on improving the fruit quality of Majia pomelo,which is the most suitable male parent for pollination at present.