Introgression of ceara rubber (Manihot glaziovii Muell-Arg) into cassava (M. esculenta Crantz): A morphological and electrophoretic evidence

By:

Wanyera, N.M.W

Contributor(s):

Material type: Article

ArticleLanguage: English Description: p. 125-130Subject(s): LOC classification:

SB 211 .C3 R66

In: In: Akoroda, M.O. (ed.). Triennial Symposium of the International Society for Tropical Root Crops-Africa Branch (5, 1992, Kampala, Uganda). Root crops for food security in Africa: ProceedingsSummary: A total of 89 population samples of three groups of Manihot species, M. esculenta, M. glaziovii and the putative hybrid species (Tree cassava) were examined for nine leaf characters and five enzyme systems to clarify the present status of morphological and molecular variation. Both morphological and electrophoretic data revealed that the three species are distinctly recognizable and have their own patterns of variation. The two data sets yielded similar results with respect to species characterization and detection and quantification of introgressive hybridization events. The results further revealed that introgression and gene flow have probably had a significant evolutionary impact on the species in regions of the zone of contact. Tree cassava in all analyses was shown to be intermediate between M. esculenta and M. glaziovii and its occurrence is the result of natural hybridization

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Item type	Current library	Collection	Call number	Copy number	Status	Date due	Barcode	Item holds
Book Chapters	CIAT Library General Book Collection	General Book Collection	SB 211 .C3 R66 (Browse shelf(Opens below))	c.1	Available

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A total of 89 population samples of three groups of Manihot species, M. esculenta, M. glaziovii and the putative hybrid species (Tree cassava) were examined for nine leaf characters and five enzyme systems to clarify the present status of morphological and molecular variation. Both morphological and electrophoretic data revealed that the three species are distinctly recognizable and have their own patterns of variation. The two data sets yielded similar results with respect to species characterization and detection and quantification of introgressive hybridization events. The results further revealed that introgression and gene flow have probably had a significant evolutionary impact on the species in regions of the zone of contact. Tree cassava in all analyses was shown to be intermediate between M. esculenta and M. glaziovii and its occurrence is the result of natural hybridization eng