Centre : Indian Institute of Oilseeds Research, Hyderabad
Name of the technology :
Development of Fusarium wilt resistant inbred lines with the assistance of molecular markers linked to wilt.
Evaluated 22 wilt resistant interspecific inbreds developed through marker-assisted selection and cultivated variety check, A1 in RBD with three replications for two years. Four inbred lines viz., ISF-22-15, ISF-28-15, ISF-31-15 and ISF-23-15 derived from (Nira x C. oxyacantha), and ISF-19-15 and ISF-21-15 derived from (Nira x C. palaestinus). recorded 9 to 29% significantly higher seed yield (1494-1726 kg/ha) and 20-65% higher oil yield (390-537 kg/ha) than A1 (1244 kg/ha; 325 kg/ha). Oil content in interspecific derivatives was significantly higher than both parents and A1. All the wild species were late in flowering (Days to 50% flowering: 90-150 days) and maturity (135-185 days) as compared to interspecific derivatives (Days to flowering: 80-85 days; days to maturity: 120-125 days). Phenologically and morphologically inbreds were akin to C. tinctorius. Of the six high yielding inbresa, four were entered into Initial Varietal Trial (IVT) of All India Coordinated Research Project on Safflower during 2016. Yield associated traits like high number of branches/plant, basal branching, and high number of capsules/plant were transferred from C. oxyacantha to C. tinctorius, resulting in an improvement in seed yield. The genes re-shuffling originating from interspecific hybridization might have also produced favourable combinations of genes expressing high yield in inbreds.
The resistant inbred lines would serve as a novel and diverse sources of resistance to Fusarium wilt. The high yielding wilt resistant interspecific inbred lines would be released as varieties if stably performed higher than the check varieties in the three year yield evaluation trial under AICRP on Safflower.
The resistant interspecific inbred lines have advantage over cultivated safflower as they are genetically diverse resistance sources because of presence of novel genes for wilt resistance in them, which may have durable resistance against Fusarium wilt.
Status of Commercialization : Not applicable