Molecular breeding tools improved drought tolerant groundnut variety for resistance tofoliar fungal diseases uri icon

abstract

  • A largely rainfed crop in India, drought tolerance, particularlymid- and end-season tolerance, is a key trait in groundnutvarieties. A combination of both empirical and trait-basedapproaches was used in breeding programs of ICAR and ICRISAT,resulting in release of few tolerant varieties that havesuperior pod yield under drought stress and/or have enhancedwater-use-efficiency. There is a need to breed varieties withdrought tolerance, disease resistance and quality traits that suitdifferent production ecologies as well as meet the needs of thefarmers, consumers and industries. ICRISAT has released anearly-maturing (90-95 d) and drought- tolerant variety ICGV91114 for the drought-prone Ananthapur district of AndhraPradesh, India, where about 0.7 m ha area is under groundnutcultivation and has low (300 mm) and erratic (30-40 rainydays) rainfall. On-farm studies conducted with ICGV 91114during 2008-10 showed 30% reduction in yield variability overthe years. Following screening in hot-spots of both rust and LLSdisease during 2014 rainy season, a total of 27 introgressionlines derived from ICGV 91114 were selected and advanced forevaluation in multi-location trials at six locations in 2015 underrainfed conditions. Based on the pod yield under rainfed conditionsand disease resistance, three superior introgression lines(ICGV 14410, ICGV 13189, ICGV 14421) were proposed for thefirst-ever NILs trial (near-isogenic lines trial) along with eightothers conducted under All India Coordinated Research Projecton Groundnut (AICRP-G) at national level

publication date

  • 2017