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Affiliation(s)
- P. J. Ann
- Chia-Yi Agricultural Experiment Station, Chia-Yi, Taiwan
| | - W. H. Ko
- Department of Plant Pathology, University of Hawaii, Beaumont Agricultural Research Center, Hilo, Hawaii 96720
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Zheng XB, Ko WH. Continuing variation in successive asexual generations of Phytophthora cinnamomi following sexual reproduction. ACTA ACUST UNITED AC 1996. [DOI: 10.1139/b96-140] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Colony-type stability of asexual progeny of selfed-oospore cultures of Phytophthora cinnamomi was investigated. Progeny were divided into parental type A, types B to E for those different from type A but with a distinct uniform pattern, and type M for those with the overlapping appearance of two different types. Colonies derived from three successive zoospore generations of isolate P630 were of the same parental A type. However, colonies from oospores of the same isolate consisted of types A, B, C, D, E, and M. Some of the oospore cultures of type A or B and all the type M oospore cultures produced zoospores containing more than one type. Oospore cultures of types C, D, or E that were tested produced zoospores with the same colony type as their respective parent. Among the five cultures randomly selected from asexual progeny produced by oospore isolates P630-21 and P630-6, four displayed continuing variation in colony type in the three to five successive zoospore generations tested. Keywords: asexual variation, continuing variation, Phytophthora cinnamomi, sexual reproduction.
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