Molecular assisted TLCNDV resistant breeding in tomato (Solanum lycopersicum L.)

Abstract

Low heterosis is an indication of least infestation of ToLCV thereby resistance/tolerance of F1s. In present study, it was observed that the most of the cross combinations belonging to P12, P13 and P14 used as a male parent exhibited low heterosis but higher resistant to ToLCV. The result indicated that cross P8 x P13 showed desirable negative heterosis over mid, better and top parent, cross P10 x P12, P11 x P12 over better and top parent at 30 and 60 DPI while, cross P6 x P13 over better and top parent at 60 DPI. It is find that among the line P10, P7, P8, P5 and P11 and tester P12 and P13 were found good general combiners as they exhibited negative and significant and low GCA effects which may be used as one of the parents while resistant breeding against ToLCV. Among the tested hybrid, none of them express negative significant SCA while all the crosses were at par with each other for SCA except P-7 x P-14, P-8 x P-14, P-9 x P-14 and P-11 x P-14.ce (б2 D) indicating preponderance of additive gene action for controlling ToLCV.. Therefore, the ToLCD management programmes could benefit from using the Ty-3 gene.