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Gene introgression in grain legumes

OAR@ICRISAT

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Relation http://oar.icrisat.org/5349/
 
Title Gene introgression in grain legumes
 
Creator Gaur, P M
et al, .
 
Subject Food legumes
 
Description The wild species of grain legumes are valuable gene pools, particularly for resistance to biotic and
abiotic stresses. These have largely remained under-utilized due to crossability barriers, but there are some
examples of successful introgression of genes into the cultivated species from their wild relatives, particularly
those constituting primary and secondary gene pools. In chickpea, two closely related species, Cicer
reticulatum and C. echinospermum, have been used for widening genetic base of the cultigen and introgressing
genes for resistance/tolerance to phytophthora root rot, cyst nematode (Heterodera ciceri), root-lesion
nematode (Pratylenchus spp.), pod borer (Helicoverpa armigera), ascochyta blight, botrytis grey mould and
low temperatures. Wild Cajanus species have been effectively exploited in developing cytoplasmic male
sterility (CMS) systems, which made commercial hybrids possible. In addition, resistance to Helicoverpa
armigera and sterility mosaic has been introgressed from C. acutifolius and C. scarabaeoides. The high
protein content trait has been introgressed from C. scarabaeoides. In Phaseolus beans, the cultivated species
of the secondary (P. coccineus and P. dumosus) and the tertiary (P. acutifolius) gene pools have been used
for the improvement of common bean (P. vulgaris). The congruity back cross system and its modifications
have been especially useful for tapping the tertiary gene pool. In lentil, genes for anthracnose and wilt
resistance and drought tolerance have been introgressed in the cultigen from L. lamottei. Presence of
crossability barriers has restricted greater exploitation of wild species, particularly in tertiary gene poolConcerted efforts are needed to overcome these crossability barriers. Cloning of desired genes from crossincompatible
wild species and their transfer through transgenic approaches may also be considered
 
Date 2009
 
Type Conference or Workshop Item
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/5349/2/Genentrogressin_in_grainlegumes.pdf
Gaur, P M and et al, . (2009) Gene introgression in grain legumes. In: International Conference on Grain Legumes: Quality Improvement , Value Addition and Trade, 14-16 Feb 2009, Kanpur, India.