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308个糯玉米审定品种SSR标记遗传多样性分析
杨 扬1, 仇律雯1, 田红丽1, 易红梅1, 卢柏山1, 王 璐1, 范亚明1, 史亚兴1, 任 洁1, 葛建镕1, 徐 丽1, 陆大雷2, 赵久然1, 王凤格1
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(1.北京市农林科学院玉米研究中心/玉米DNA指纹及分子育种北京市重点实验室;2.扬州大学/江苏省作物遗传生理国家重点实验室培育点/粮食作物现代产业技术协同创新中心)
摘要:
随着中国糯玉米产业的蓬勃发展,每年通过审定的糯玉米品种逐渐增多,为了解其育成品种的遗传多样性和亲缘关系,本研究以308个糯玉米审定品种为材料,利用SSR标记从审定年份和适宜种植区2个角度分析近年来糯玉米审定品种遗传多样性特点和发展趋势。结果表明,308份糯玉米审定品种在40个SSR标记上共检测出529个等位基因、1480种基因型,PIC变幅为0.226~0.890,平均为0.684。从审定时间看,各年份间审定品种的遗传多样性指数波动不大,其中2015年审定品种的遗传多样性最高,为0.720。从适宜种植区看,西南区审定品种的PIC值最高,遗传距离分析表明西南区和另外3个适宜种植区有着最远的遗传距离,平均为0.0217;聚类分析结果显示,西南区部分品种聚集为一组,表现出一定的地域特色。聚类分组中以京科糯2000为代表的第Ⅲ组品种数目最多,且在主坐标图中独立分布,表明优良品种的出现及其杂优模式的推广能够丰富和拓宽品种的遗传多样性,为糯玉米新品种改良提供导向作用的同时推动糯玉米产业的发展。
关键词:  糯玉米  审定品种  SSR标记  遗传多样性
DOI:10.13430/j.cnki.jpgr.20210629001
投稿时间:2021-06-29修订日期:2021-08-03
基金项目:北京市农林科学院科技创新能力建设专项(KJCX20200305)
Genetic Diversity Analysis of 308 Waxy Maize Varieties by SSR Markers
YANG Yang1, QIU Lyu-wen1, TIAN Hong-li1, YI Hong-mei1, LU Bai-shan1, WANG Lu1, FAN Ya-ming1, SHI Ya-xing1, REN Jie1, GE Jian-rong1, XU Li1, LU Da-lei2, ZHAO Jiu-ran1, WANG Feng-ge1
(1.Maize Research Center, Beijing Academy of Agriculture and Forestry Sciences / Beijing Key Laboratory of Maize DNA Fingerprinting and Molecular Breeding;2.Jiangsu Key Laboratory of Crop Genetics and Physiology / Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University)
Abstract:
With the vigorous development of China''s waxy maize industry, more and more waxy maize varieties have been approved. In this study, 308 approved waxy maize hybrids were used as materials to analyze by SSR markers the genetic diversity and genetic relationship of waxy maize hybrids from the aspects of year and suitable planting area. The results showed that a total of 529 alleles or 1480 genotypes were detected on 40 SSR markers in the 308 waxy maize varieties, and the PIC range was 0.226-0.890, with an average of 0.684. From the perspective of approval time, the genetic diversity index of approved varieties fluctuated little from year to year, and the highest genetic diversity of approved varieties in 2015 (0.720). From the perspective of suitable planting area, the PIC index of varieties in Xinan area was the highest, and the genetic distance between the varieties in Xinan area and those in other planting areas was the farthest, with an average of 0.0217. The results of cluster analysis showed that some varieties in Xinan area were clustered into a group, presenting certain regional characteristics. Among these cluster groups, Group III represented by ‘Jing Kenuo 2000’ had the largest number of varieties, and was distributed independently in the main coordinate map, which showed that the emergence of excellent varieties and the promotion of hetero-excellent model could enrich and broaden the genetic diversity of varieties, which would provide guidance for the improvement of new waxy maize varieties, and promote the development of waxy maize industry.
Key words:  waxy maize  approved varieties  SSR markers  genetic diversity