Molecular approaches to the taxonomy of Phytophthora capsici and P.citrophthora using isozyme and mitochondrial DNA analyses

Oudemans P., . and Forster H., . and Mchau G., . and Coffey M.D., . (1990) Molecular approaches to the taxonomy of Phytophthora capsici and P.citrophthora using isozyme and mitochondrial DNA analyses. [Proceedings Paper]

Molecular approaches to systematics such as use of isozyme electrophoresis and analysis of restriction fragment length polymorphisms RFLPs of mitochondrial DNA mtDNA provide an objective genetic approach to testing current taxonomic schemes for the genus Phytophthora. Using these techniques we have examined isolates of two species: P.capsici and P.citrophthora. Our findings indicate that P.citrophthora exists as two distinct subgroups one from citrus and kiwi from worldwide sources CTR1 and another from cocoa in Brazil CTR2. Isolates of P.capsici form three subgroups. A large subgroup CAPI contained isolates from Capsicum sp. tomato cucurbits Piper nigrum and cocoa; a second subgroup CAP2 contained isolates from Piper nigrum macadamia cocoa and rubber from tropical locations. Finally a third subgroup CAP3 consisted only of isolates attacking cocoa in Brazil

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Abstract

Molecular approaches to systematics such as use of isozyme electrophoresis and analysis of restriction fragment length polymorphisms RFLPs of mitochondrial DNA mtDNA provide an objective genetic approach to testing current taxonomic schemes for the genus Phytophthora. Using these techniques we have examined isolates of two species: P.capsici and P.citrophthora. Our findings indicate that P.citrophthora exists as two distinct subgroups one from citrus and kiwi from worldwide sources CTR1 and another from cocoa in Brazil CTR2. Isolates of P.capsici form three subgroups. A large subgroup CAPI contained isolates from Capsicum sp. tomato cucurbits Piper nigrum and cocoa; a second subgroup CAP2 contained isolates from Piper nigrum macadamia cocoa and rubber from tropical locations. Finally a third subgroup CAP3 consisted only of isolates attacking cocoa in Brazil

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Item Type:	Proceedings Paper
Additional Information:	Summary En
AGROVOC Term:	PHYTOPHTHORA CAPSICI
AGROVOC Term:	PHYTOPHTHORA CITROPHTHORA/ ESPECIES
AGROVOC Term:	CLASIFICACION
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:26
URI:	http://webagris.upm.edu.my/id/eprint/15304

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