利用SSR技术鉴定西葫芦杂交种子纯度
2019-01-13朱海生王彬刘建汀陈敏氡李永平张前荣温庆放
朱海生 王彬 刘建汀 陈敏氡 李永平 张前荣 温庆放



摘 要:为了建立一套快速、简单、准确、高效的西葫芦种子纯度检测方法,以西葫芦‘福美1号及其亲本为试验材料,利用SSR 分子标记技术鉴定杂交种子纯度。从114对SSR引物中筛选出了1 对引物(SGSSR25),在杂交种和父、母本之间存在显著差异的条带,且杂交种含有父、母本的特异互补带型。利用该引物对23株‘福美1号杂交种进行纯度鉴定,结果为91.30%,与大田种植鉴定结果一致,表明该引物可用于‘福美1号杂交一代种子纯度的快速检测和准确鉴定,SSR分子标记技术应用于西葫芦杂交种子纯度检测具有可行性。
关键词:西葫芦;SSR分子标记;种子纯度
Analysis of genetic diversity in squash by SSR markers
ZHU Haisheng, WANG Bin, LIU Jianting, CHEN Mindong, LI Yongping, ZHANG Qianrong, WEN Qingfang
(Fujian Engineering Research Center for Vegetables / Vegetable Research Center, Fujian Academy of Agricultural Sciences / Crops Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350013, Fujian, China)
Abstact: In order to establish a rapid, simple, accurate and efficient method for detecting the seed purity of Cucurbita pepo, ‘Fumei No. 1 and its parents were used as experimental materials to identify the purity of hybrid seeds with SSR molecular marker technology in this study. One primer pair (SGSSR25) was filtered from 114 SSR primer pairs. Amplification results showed that there were significant different bands between the hybrids and their parents, and the hybrids contained specific complementary bands between the female and male parents. Twenty three individual seeds were tested with the primer, and the seed purity was 91.30%, which was consistent with the result in the field. The results indicated that the primer SGSSR25 could be used for rapid and accurate identification of seed purity of ‘Fumei No. 1 hybrid generation, and SSR molecular marker technology was feasible for purity detection of hybrid seeds in Cucurbita pepo.
Key words: Cucubita pepo L.; SSR molecular marker; Seed purity
西葫蘆(Cucubita pepo L.)是葫芦科南瓜属的一个种,为一年生蔓性草本蔬菜作物,也叫美洲南瓜,具有较高的营养价值和保健功能,且具有生长期短、产量高、耐贮运、适宜间作套种等优点[1],深受大众喜爱。西葫芦在我国各地均有大面积栽培,已成为我国瓜类蔬菜的主栽品种之一,栽培面积次于黄瓜[2-3],并有逐年扩大之势,具有广阔的应用前景和巨大的经济潜力。利用杂种优势,培育一代杂交西葫芦品种是目前西葫芦育种的主要方法。在西葫芦杂交制种过程中,由于人工去雄不彻底或漏去雄等原因,常会出现假杂交种,导致种子纯度下降,给生产造成巨大的经济损失。因此,杂交种品种纯度和种子真实性的准确、简便、快速鉴定成为西葫芦生产中急需解决的问题之一。
随着生物技术的快速发展,从DNA分子水平上对品种种子纯度和真实性进行鉴定和分析成为可能,其中,采用分子标记技术鉴定种子纯度是一种快速、准确、便捷、有效的方法。……
