Document Detail

Gene flow between cassava, Manihot esculenta Crantz, and wild relatives.
MedLine Citation:
PMID:  15011137     Owner:  NLM     Status:  MEDLINE    
Controlled and natural hybridization between cassava and wild relatives does occur. Barriers within the genus appear to be weak due to recent evolution of the group. All Manihot species examined cytogenetically have a chromosome number of 2n = 36. However, they behave meiotically as diploids. The weak interspecific barriers have led to an extremely heterozygous gene pool that may begin a sequence of hybridization followed by speciation. Introgression from cassava into a number of wild species (M. neusana, M. alutacea, M. reptans and M. anomala) has been detected by both morphological marker genes and molecular techniques. Winged fruit, setaceous bracteoles, and wide leaf sinus were dominant genes that came from cassava and appeared in the hybrids. The characteristic protein bands of cassava were recognized in the hybrid seed protein electrophoresis.
Nagib M A Nassar
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review     Date:  2003-12-30
Journal Detail:
Title:  Genetics and molecular research : GMR     Volume:  2     ISSN:  1676-5680     ISO Abbreviation:  Genet. Mol. Res.     Publication Date:  2003  
Date Detail:
Created Date:  2004-03-10     Completed Date:  2004-06-07     Revised Date:  2007-05-02    
Medline Journal Info:
Nlm Unique ID:  101169387     Medline TA:  Genet Mol Res     Country:  Brazil    
Other Details:
Languages:  eng     Pagination:  334-47     Citation Subset:  IM    
Departamento de Genética e Morfologia, Universidade de Brasília, Brasília, DF, Brasil.
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MeSH Terms
Crosses, Genetic*
Cytogenetic Analysis / methods
Genes, Plant / genetics*
Genetic Markers
Hybridization, Genetic / genetics
Manihot / classification,  genetics*
Reg. No./Substance:
0/Genetic Markers

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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