PJB-2005-13
IDENTIFICATION OF BLIGHT RESISTANT GENOTYPES FROM LOCAL AND EXOTIC CHICKPEA GENETIC RESOURCES
SHEIKH MUHAMMAD IQBAL AND ABDUL GHAFOOR*
Abstract
Four hundred and forty eight chickpea genotypes obtained from local and exotic sources were screened against blight at two stages during winter 2002-03. None of the genotypes was highly resistant at any stage, whereas 46 genotypes at seedling in the greenhouse and 94 at pod formation stage in the field were resistant. Thirty genotypes were resistant at both the stages and these are suggested to test under multilocational/agronomic trials for further varietal development. Based on relationship among two stages it is suggested that screening could better be done at seedling stage for preliminary selection and then genotypes with high level of resistance at seedling should be reconfirmed at pod formation stage. Common genotypes, which were resistant at seedling and adult plant stage, are suggested to be utilized in breeding programme to build disease resistance pyramids due to complex nature of Ascochyta blight. Disease at seedling and adult plant stage exhibited high association although level of infection was higher at seedling stage. It is suggested to screen huge germplasm lines at seedling stage under greenhouse conditions to save time and labour. Genotypes that give higher level of resistance at seedling stage could be screened at adult plant stage under field conditions.
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