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分子植物育种
(
网络版
), 2013
,
11
,
1114
-
1122
Fenzi Zhiwu Yuzhong (Online), 2013, Vol.11, 1114
-
1122
http://mpb.5th.sophiapublisher.com
Copyright © 2013 5
th
Publisher 1114
研究报告
Article Report
贵州辣椒疫霉菌交配型测定及遗传多样性分析
陈龙
1
,
袁洁
2
,
何海永
2
,
陈小均
2
,
吴石平
2
,
王云月
1
,
杨学辉
2
1.
云南农业大学植物保护学院
,
农业生物多样性与病害控制教育部重点实验室
,
昆明
, 650102
2.
贵州省植物保护研究所
,
贵阳
, 550006
通讯作者:
wangyykm@gmail.com; yxuehui66@163.com
作者
分子植物育种
, 2013
,
11
,
17
doi: 10.5376/mpb.cn.2013.11.0017
这是一篇采用
Creative Commons Attribution License
进行授权的开放取阅论文。只要对本原作有恰当的引用
,
版权所有人允许并同意第三方无条
件的使用与传播。
引用格式
(
中文
)
陈龙等
, 2013,
贵州辣椒疫霉菌交配型测定及遗传多样性分析
,
分子植物育种
(online), 11(17): 1114-1122 (doi: 10.5376/mpb.cn.2013.11.0017)
引用格式
(
英文
)
Chen et al., 2013, Mating Type Determination and Genetic Diversity of
Phytophthora capsici
Isolates in Guizhou, Fenzi Zhiwu Yuzhong (online)
(Molecular Plant Breeding), 11(17): 1114-1122 (doi: 10.5376/mpb.cn.2013.11.0017)
采用单孢菌落直接配对法和
RAPD
分子标记对源自贵州省贵阳、毕节、遵义、黔南、安顺和六盘水等
6
个地区
10
余个县乡的的
72
个辣椒疫霉单孢菌株分别进行交配型测定和遗传多样性分析。结果表明,
72
个菌株分属
A1
A2
A1,A2
种交配型,发生频率分别为
8.3%
88.9%
2.8%
,以
A2
交配型占绝对优势,在各产区均有分布。
RAPD
遗传多样性分析显示,
筛选的
31
个引物共标记出
329
DNA
指纹条带,其中
317
条具有多态性,多态性检测率为
96.35%
,各地区菌株
Shannon's
多样性指数在
0.1142~0.4244
之间,平均为
0.2224
;其顺序为:贵阳
(0.4244)
>遵义
(0.2995)
>毕节
(0.1926)
>黔南
(0.1822)
安顺
(0.1206)
>六盘水
(0.1142)
,表明贵州辣椒疫霉菌具有丰富的遗传多样性。以遗传相似系数
0.78
为阈值,
UPGMA
聚类分
析法将供试菌株划分为
7
大类群,聚类组的划分与菌株地理分布、寄主品种显示一定的相关性。
关键词
辣椒疫霉
;
交配型
; RAPD;
遗传多样性
Mating Type Determination and Genetic Diversity of
Phytophthora capsici
Isolates
in Guizhou
Chen Long
1
,
Yuan Jie
2
, He Haiyong
2
, Chen Xiaojun
2
, Wu Shiping
2
,
Wang Yunyue
1
, Yang
Xuehui
2
1. Ministry of Education Key Laboratory for Agrobiodiversity and Plant Disease Management, College of Plant Protection, Yunnan Agricultural University,
Kunming, 650201, P.R. China
2. Guizhou Institute of Plant Protection, Guiyang, 550006, P.R. China
Corresponding authors, wangyykm@gmail.com; yxuehui66@163.com;
Authors
Abstract
In order to master the composition and distribution of mating type, and population genetic diversity of
P. capsici
, a
collection of
P. capsici
isolates isolated from different regions (Guiyang, Bjie, Zunyi, Qiannan, Anshun, Liu Panshui) in Guizhou
Province were characterized in this study by matching pairs with standard isolates, and RAPD-PCR method, respectively. Total 72
isolates were divided into A1 mating type 6 isolates, A2 mating type 64 isolates and A1,A2 mating type 2 isolates. A2 was the
dominant mating type and distributed in all sampling regions which accounted for 88.9%. RAPD analysis using 31 random primers
resulted in 329 reproducible bands, of which 317 (96.35%) were polymorphic. This shows that abundant genetic diversity existed
among different isolates. Shannon
s Diversity indices in different regions were between 0.1142~0.4244, with the average of 0.2224.
The sequence of Shannon
s Diversity indices was “Guiyang (0.4244) > Zunyi (0.2995) > Bijie (0.1926) > Qiannan (0.1822) >
Anshun (0.1206) > Liu Panshui (0.1142)”. Seven clusters were obtained by using UPGMA analysis at level of 0.78 similarity,
clusters have certain relevance with geographic region and host varieties, respectively.
Keywords
Phytophthora capsici
; Mating type; RAPD; Genetic diversity
研究背景
辣椒疫病是由辣椒疫霉菌
(
Phytophthora capsici
Leonian)
侵染引起的一种土传真菌病害
(Hausbeck
et
al.,
2004)
。除侵染辣椒外,该病原菌还可引起茄子、
收稿日期:
2013
03
13
接受日期:
2013
04
29
发表日期:
2013
06
14
基金项目:本研究由贵州省科技攻关项目
(
黔科合
NY
(2009)3002)
资助