The Occurrence and Biology of Botryotinia fuckeliana on Beans in New York

Polach, F. J.; Abawi, G. S.

doi:10.1094/phyto-65-657

Cited by 18 publications

(7 citation statements)

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“…Both mating types were also present in isolates collected from Almería (Delcá n, 1997). However, sexual structures have never been observed in the field in Almería and only occasionally in other regions of the world (Polach & Abawi, 1975 Heterokaryosis is widely accepted as an important source of variation in B. cinerea (Lorbeer, 1980), but its role is still not well understood. Heterokaryosis is necessary for parasexual recombination to occur, but parasexuality has apparently not yet been reported for B. cinerea.…”

Section: Overall Diversitymentioning

confidence: 99%

Genetic diversity in Botrytis cinerea populations on vegetable crops in greenhouses in south‐eastern Spain

2000

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Seventy-nine random amplified polymorphic DNA (RAPD) markers, of which 46 were polymorphic and 33 monomorphic, were used to determine the level of genetic diversity and to study the structure of populations of Botrytis cinerea in Almería, Spain. Sixty-five isolates were collected in the first survey (December 1992, at the beginning of the epidemic) from 23 commercial greenhouses of common winter crops in two regions, Levante and Poniente. In the second survey, conducted three months later at the end of the epidemic, 75 isolates were collected from 16 greenhouses in Poniente. The analysis of population structure revealed that genetic diversity within subpopulations sampled in the two surveys accounted for 98% of the total genetic diversity, while genetic diversity between subpopulations represented only 2% of the total diversity. The relative magnitude of gene differentiation between subpopulations, G ST , averaged 0·017. In the first survey, partition of genetic diversity into hierarchical components by greenhouses within regions showed that the within-greenhouse component of diversity was 93%, the betweengreenhouses, within-region component was 6%, and the between-regions component was 1%. Similar results were obtained when comparisons were made between greenhouses in the second survey or between populations of different countries: genetic diversity within subpopulations accounted for 95 and 96%, respectively, of the total genetic diversity. In all comparisons, values of G ST were higher than 0·01, ranging from 0·011 to 0·055. Analysis of likelihood ratio chi-square (G 2 ) statistics under the null hypothesis that frequencies of markers are similar between subpopulations showed that different markers contributed to the differentiation between subpopulations in each comparison. The relative importance of several evolutionary forces in populations of B. cinerea is discussed, together with implications for the management of grey mould.

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Section: Overall Diversitymentioning

confidence: 99%

Genetic diversity in Botrytis cinerea populations on vegetable crops in greenhouses in south‐eastern Spain

2000

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“…The sexual state of B. cinerea is not uncommon in nature (e.g. de Istvanffi, 1905;Polach & Abawi, 1975) but is unknown in B. fabae. Apothecia may be produced most readily during spring after the low temperatures of winter.…”

Section: Ascosporesmentioning

confidence: 99%

The biology of Botrytis spp. on Vicia beans and chocolate spot disease‐a review

Harrison¹

1988

Plant Pathology

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“…The relationship between B. cinerea and Botryotinia fuckeliana has been demonstrated by Groves & Drayton (1939), Groves & Loveland (1953) and Polach & Abawi (1975). The common conidial state, B. cinerea, consists of coenocytic mycelia that give rise to asexual spores and sclerotia (tough, black, irregular-shaped aggregations of hyphae).…”

Section: Introductionmentioning

confidence: 99%

Phenotypic Differences Between Natural and Induced Variants of Botrytis cinerea

Grindle

1979

Journal of General Microbiology

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109Wild isolates of Botrytis cinerea were analysed to assess their suitability for genetic studies. When compared on synthetic and artificial media under laboratory conditions, the isolates differed in rate of growth, conidiation, sclerotia production and resistance to benomyl. Asexual progeny of individual cultures were sometimes phenotypically diverse, indicating that they could be heterokaryotic or heteroplasmic. Attempts to derive auxotrophic, nystatin-resistant and benomyl-resistant mutants from mutagen-treated conidia were not successful : only morphological and spore colour variants were recovered, and most of the morphological variants were phenotypically unstable. Cultures produced both macroconidiophores and microconidiophores. Macroconidia were about 10 pm long x 8 pm wide, contained 1 to 12 nuclei (mean 3.4) and usually germinated readily on agar media. Microconidia were about 3 pm diameter, uninucleate and rarely germinated on agar media. The perfect state, Botryotinia fuckeliana, was not recovered from mixed inocula of the wild strains. The significance of the results is discussed in relation to the use of B. cinerea for laboratory studies and the possible genetic basis of natural variations.

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The Occurrence and Biology of Botryotinia fuckeliana on Beans in New York

Cited by 18 publications

References 0 publications

Genetic diversity in Botrytis cinerea populations on vegetable crops in greenhouses in south‐eastern Spain

Genetic diversity in Botrytis cinerea populations on vegetable crops in greenhouses in south‐eastern Spain

The biology of Botrytis spp. on Vicia beans and chocolate spot disease‐a review

Phenotypic Differences Between Natural and Induced Variants of Botrytis cinerea

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