Heterotic Studies For Yield and Yield Components Coupled with Stem Rot Resistance in Groundnut (Arachis hypogaea L.)

Byadmin

K. Amarnath1 , M. Reddisekhar2 , K. John3 , P. Sudhakar4 , K. Viswanth5

Abstract:

As groundnut cultivation is hampered by stem rot disease incidence causing yield loss upto 20%. Hence, the present study aimed to identify highly heterotic cross combinations for pod yield and stem rot resistance. Nine parents (five lines and four testers) along with 20 F1 crosses were evaluated for yield, yield component traits and stem rot resistance to estimate the magnitude of heterosis in stem rot sick plot and control condition during rabi, 2019.The cross, ICGV-07262 x TCGS-1862 was identified as the best heterotic cross for pod yield plant-1 and its components and also the predominance of over dominance effects was observed for yield and its components over standard resistant tester J-11 in sick plot condition and over standard line Kadiri-6 in control condition, respectively. The crosses viz., Narayani x J-11, Kadiri-6 x CS-19, ICGV-07262 x TCGS-1862 and ICGV-07262 x TCGS-2149 were identified as best cross combinations for both yield and stem rot resistance. Hence, these crosses are exploited in groundnut-resistant breeding program to delineate the best heterotic potential present in the crop for further improvement.

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