Sexual compatibility in Fusarium pseudograminearum (Gibberella coronicola)

被引：18

作者：

Bentley, Alison R. ^{[1
]}

Summerell, Brett A. ^{[2
]}

Burgess, Lester W. ^{[1
]}

机构：

[1] Univ Sydney, Fac Agr Food & Nat Resources, Sydney, NSW 2006, Australia

[2] Royal Bot Gardens & Domain Trust, Sydney, NSW 2000, Australia

来源：

MYCOLOGICAL RESEARCH | 2008年 / 112卷

关键词：

Biological species; Carrot agar; Mating type; Sib-mating;

D O I：

10.1016/j.mycres.2008.04.016

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

Numerous pathogenic Fusarium species have well-characterized sexual cycles, whereas others, including the crown rot fungus F. pseudograminearum, do not. We conducted studies to elucidate the potential frequency and nature of sexual reproduction in field populations of F. pseudograminearum and developed tester strains for controlled crossings under laboratory conditions. Studies on the role of sexual recombination in the life cycle of F. pseudograminearum revealed apparently low levels of female fertility under controlled laboratory conditions, despite the observation of naturally occurring perithecia of the teleomorph Gibberella coronicola at two field sites. Female fertility levels were experimentally increased to produce female fertile tester strains using four generations of single and multi-stage crossings between sibling progeny derived from fertile laboratory crosses between field isolates collected in northeastern Australia. The production of reliable female fertile tester strains has potential applications for the construction of biological species boundaries, elucidation of the physical characters of reproductive structures, and the generation of genetic diversity via sexual recombination in F. pseudograminearum. As such, the current study is a significant advancement in the understanding of G. coronicola, allowing for future characterisation of various biological, epidemiological, and genetic parameters. (C) 2008 The British Mycological Society. Published by Elsevier Ltd. All rights reserved.

引用

页码：1101 / 1106

页数：6

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