High yielding and drought tolerant genotypes developed through marker-assisted back crossing (MBAC) in chickpea uri icon

abstract

  • Chickpea (Cicer arietinum L.) is the second largest grown food legume crop in theworld after common bean. This crop is largely grown under rainfed conditions in Asiaand sub-Saharan Africa where terminal drought is the major production constraint.Generation of large scale genomic resources in chickpea during the recent years hasmade it possible to improve the complex traits like drought tolerance. A ?QTL-hotspot?harbouring QTLs for several root and drought tolerance traits was transferredfrom the drought tolerant line ICC 4958 to a leading chickpea cultivar JG 11 (ICCV93954), and a widely adapted cultivar Bharati (ICCV 10) in India. A set of 20 BC3F4/BC3F5 introgression lines (ILs) of JG 11 and 22 of Bharati were evaluated at three tofour locations (Patancheru, Nandyal, Gulbarga and Dharwad) in Southern India overtwo years during 2011-12 to 2014-15. Many lines giving at least 10% higher yieldthan the recurrent parents JG 11 and Bharati were identified at each location and ineach growing condition (rainfed/irrigated). As the introgressed genomic region alsoinfluences seed size, most ILs had bigger seed than the recurrent parents. These resultsare very encouraging and demonstrate the effectiveness of marker-assisted breedingin improving terminal drought stress tolerance in chickpea

publication date

  • 2015