STUDIES ON BACTERIAL WILT RESISTANCE AND ASSESSMENT OF THEIR PERFORMANCE IN SEGREGATING AND NON-SEGREGATING POPULATIONS OF TOMATOMamatha N.C., H.B. Lingaiah, Jyothi H.K. and Sachin Utagi
The non-segregating lines viz., three F1s (PKM-1 x Utkal Raja, Utkal Raja x Arka Sourabh and Anaga x Arka Meghali), respective parents and two commercial checks (Arka Rakshak and Arka Samrat) were evaluated for bacterial wilt resistance in wilt sick plot after artificial inoculation before transplanting and observed for their performance towards other economic traits in set of plants planted in uniform fertile soil. The results revealed that the cross Utkal Raja x Arka Sourabh showed higher resistance among the thr ee crosses evaluated and it also performed best with respect to yield, average fruit weight and other economic traits so, it was forwarded to next generation for evaluation with respect to bacterial wilt resistance and other economic traits. Evaluation of F2 segregating population of cross Utkal Raja x Arka Sourabh revealed that the bacterial wilt resistance followed the hypothetical ratio of 13 resistant: 3 susceptible which clearly indicated that the resistance in the material was controlled by two dominant genes with inhibitory gene action and it also lead to identification of some transgressive segregants which were identified as best for yield attributing traits like average fruit weight, yield per plant and other economic traits.
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