GENETIC-VARIATION IN THE COFFEE BERRY DISEASE PATHOGEN, COLLETOTRICHUM-KAHAWAE

被引：10

作者：

BEYNON, SM ^{[1
]}

CODDINGTON, A ^{[1
]}

LEWIS, BG ^{[1
]}

VARZEA, V ^{[1
]}

机构：

[1] UNIV E ANGLIA,SCH BIOL SCI,NORWICH NR4 7TJ,NORFOLK,ENGLAND

来源：

PHYSIOLOGICAL AND MOLECULAR PLANT PATHOLOGY | 1995年 / 46卷 / 06期

关键词：

D O I：

10.1006/pmpp.1995.1035

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The genetic variation among 25 isolates of Colletotrichum kahawae from widely distributed sources in Africa was studied. Pathogenicity tests on hypocotyls of Coffea arabica cv. Caturra, distinguished a moderately aggressive and a highly aggressive group of isolates. Analysis of restriction fragment length polymorphisms (RFLPs) with a Fusarium oxysporum ribosomal DNA repeat from the plasmid pDG312 clearly distinguished C. kahawae from the other two species, C. gloeosporioides and C. acutatum, commonly found with the pathogen on coffee. However, no polymorphisms were detected amongst the isolates of C. kahawae. Despite this apparent uniformity in probed DNA, complementation tests with mutants in the nitrate assimilation pathway revealed at least five vegetative compatibility groups (VCGs). This apparent lack of correlation between the RFLP analysis and the variation predicted from the vegetative compatibility grouping may indicate the existence of a teleomorphic stage of the pathogen, which is as yet undiscovered.

引用

页码：457 / 470

页数：14

共 21 条

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