Development and genetic evaluation of recombinant inbred line population for yield and its attributing traits and marker assisted selection for bacterial wilt resistance in tomato

A total of 147 recombinant inbred lines were developed from the cross Anagha x FBT-41 using single seed descent method to evaluate genetic parameters and identification of superior inbred lines using marker assisted selection. The analysis of variance revealed that there is a significant variation was observed between the lines for all the traits studied. Skewness values ranged from 0.16 (number of cluster per plant and number of locules per fruit) to 1.16 (TSS) and kurtosis ranged from 1.73 (number of clusters plant and number of locules per fruit) to 4.1 (TSS) which follows normal distribution suggesting that the involvement of multiple genes with quantitative nature of inheritance. Higher PCV, GCV, h2bs and GAM observed in plant height , number of branches per plant , number of cluster per plant , number of fruits per cluster , fruit locules , fruit length , fruit diameter, average fruit weight , number of fruits per plant and yield per plant indicated additive nature of gene action so there is scope for selection. Out of four bacterial wilt linked marker used in this study only one SCAR marker i.e., SCU176-534 showed polymorphism between parents so it is used for marker assisted selection to identify superior inbred lines coupled with bacterial wilt resistance. A total seven superior inbred lines were selected coupled with bacterial wit resistance. This lines can be used in further breeding programme as directly released as variety or use as parents to develope bacterial wilt resistant hybrids.