Breeding chickpea for water limited environments: selection indices and strategies uri icon

abstract

  • Chickpea (Cicer arietinum L.) is the one of the most importantpulse crops in the world and its production is limited by terminaldrought. Unlike conventional breeding for yield, it is morechallenging and requires to be measured in terms of its manifestationtowards changing performance of a genotype understress. An evaluation of a panel developed for drought andbreeding studies has clearly identified the presence of largevariability for drought tolerance. A large number of traits havebeen screened and it has been inferred that drought susceptibilityindex is the best way to identify genotypes that haveresilience to terminal drought. However, different genotypespossessed various physiological mechanisms to cope with theeffects of drought and, hence, provide ample opportunities tobreeders to combine them to develop drought-tolerant genotypes.The chickpea genotypes L550, PG112 and ICC92944have shown higher mean values for yield traits under stressand have desirable terminal drought-tolerant mechanisms foryield and other associated characters such as lower DSI, higherHI, higher BY and higher grain yield. They have, thus, emergedas stable genotypes for yield under stress situations. ThoughMABC for root traits has been identified, rapid screening techniquesusing CTD and identification of markers for MSI andRWC to be used for screening segregating generations appearsto be promising in north Indian conditions. This is because unlikein south India, drought in the north India develops abruptlyafter a cold period, giving little time for the root system torespond. Thus, breeding for terminal drought tolerance wouldrequire concentrating on these traits too

publication date

  • 2017