Evaluation of chickpea (Cicer arietinum L.) lines for tolerance to herbicide

摘要: Chickpea (Cicer arietinum L.) is an important pulse crop grown in semi-arid regions of world. It is gaining importance because of its varied uses and nutritional value. India is the largest producer, consumer as well as importer of chickpea. Chickpea productivity is affected by a number of biotic and abiotic constraints. It is very sensitive to weeds especially during the early crop growth period and removal of weeds is done manually. The present research work aimed at identification of sources of tolerance to herbicide Imazethapyr for their possible utilization in development of herbicide tolerant chickpea. Sixty five genotypes (55 desi and 10 kabuli) screened included accessions from ICRISAT core collection, advanced breeding lines and cultivars. The herbicide tolerance score ranged from 1.9 to 5.0. Molecular diversity analysis based on ten polymorphic SSR markers grouped the genotypes into three major clusters. Ten SSR markers detected a total of 27 alleles with an average of 2.7 alleles per locus with mean polymorphic information content value of 0.3. Nine tolerant to moderately tolerant and three susceptible genotypes were evaluated in RCBD under control and sprayed condition. Genotype x environment interactions were observed for days to 50% flowering, NDVI, days to maturity, yield, biomass, harvest index, 100-seed weight and branched chain amino acids (valine, leucine and isoleucine content). Biomass, harvest index were significantly correlated to yield under sprayed condition. Harvest index showed significant positive correlation with percent leucine content in sample. NDVI showed significant negative correlation with days to …