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剑麻EST-SSR在丝兰麻和中美麻中的通用性分析

2021-08-26张燕梅李俊峰鹿志伟杨子平周文钊

热带作物学报 2021年7期

张燕梅 李俊峰 鹿志伟 杨子平 周文钊

摘  要:采用聚丙烯酰胺凝胶电泳技术,对剑麻‘H.11648中的100对SSR引物在丝兰麻和万年兰中的通用性进行分析,同时构建DNA指纹图谱。结果表明100对SSR引物,在龙舌兰属、丝兰麻属、中美麻属中分别有68对、52对和52对SSR引物扩增出目标产物条带,扩增产物所占比例分别为68%、52%和52%,多态性引物分别为18对、12对和9對,多态性引物所占比例分别为29.51%、23.08%和17.31%。检测位点数分别为76、44和40个,平均每对引物多态位点数分别为2.67、2.42和2.22个。引物C67656和C61418可将龙舌兰属的6份种质区分开来,引物C65059可将丝兰麻属的5份种质区分开,引物C24110可将中美麻属的4份种质区分开。以上研究结果表明,从‘H.11648开发的SSR引物在龙舌兰及其近缘属中是可以通用的,筛选出的SSR引物可用于龙舌兰及其近缘属种质资源的鉴定和遗传多样性分析等研究。

关键词:剑麻;EST-SSR;丝兰麻;中美麻;通用性

中图分类号:S563.8      文献标识码:A

Transferability Analysis of Sisal EST-SSR Markers in Yucca and Furcraea vent

ZHANG Yanmei, LI Junfeng, LU Zhiwei, YANG Ziping, ZHOU Wenzhao*

South Subtropical Crops Research Institute, Chinese Academy of Tropical Agricultural Sciences / Zhanjiang City Key Laboratory for Tropical Crops Genetic Improvement, Zhanjiang, Guangdong 524091, China

Abstract: In this study, polyacrylamide gel electrophoresis was used to analyze the generality of 100 pairs of SSR primers from ‘H.11648 in Agave and its related genus, and DNA fingerprinting was constructed. The results showed that 68, 52 and 52 pairs of SSR primers could amplify the expected products in Agave, Yucca and Furcraea vent, respectively. The proportion of amplified products was 68%, 52% and 52%. 18, 12 and 9 pairs of SSR primers showed polymorphic and the polymorphic percentage was 29.51%, 23.08% and 17.31%. The total number of polymorphic loci was 76, 44 and 40 with average number of polymorphic loci amplified by each primer was 2.67, 2.42 and 2.22, respectively. Primers C67656 and C61418 could discriminate six germplasms in Agave, Primer C65059 could discriminate five germplasms in Yucca, Primer C24110 could discriminate four germplasms in Furcraea vent. The above results indicated that the SSR primer in ‘H.11648 was transferable in Agave and its related genera, which laid a foundation for germplasm identification and genetic diversity analysis of Agave and its related genera.

Keywords: sisal; EST-SSR; Yucca; Furcraea vent; transferability

DOI: 10.3969/j.issn.1000-2561.2021.07.003

剑麻属龙舌兰科(Agavaceae)多年生单子叶植物,全世界有20个属约670种,主要分布在墨西哥等热带、亚热带地区[1],我国现保存有7个属约100余份种质资源,其中龙舌兰属植物较多,作为一种重要的热带经济作物,除生产纤维外,剑麻茎心可用来酿酒[2],麻渣可做饲料、制药以及肥料等[3],剑麻亦可作为园林植物,有重要的观赏价值。

微卫星DNA(microsatellite DNA),又称简单重复序列(simple sequence repeat, SSR),是由1~6个核苷酸为重复单位串联而成的长达几十个核苷酸的重复序列,广泛分布于整个基因组中,按其来源可分为基因组SSR(gSSR)和表达序列标签SSR(EST-SSR)。与其他分子标记相比,SSR标记具有多态性高、重复性好、共显性遗传等优点[4],可以区分纯合子和杂合子,广泛应用于遗传分析[5]、种质资源鉴定[6]以及遗传作图[7]和QTL分析[8]等领域。……

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