Combining Ability Analysis in Linseed (Linum usitatissimum L.)

Author: Jadala Ravali, Beena M. Nair, Rani Jadhav, Prema R. Manapure and Achal B. Jagzape

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Abstract

The present research was executed for evaluation of combining ability analysis using 12 lines and 3 testers in a line × tester mating design. The data on mean squares due to the parents and their crosses were highly significant for all nine characters studied i.e. days to 50% flowering (on plot basis), days to maturity (on plot basis), plant height (cm), number of branches plant-1, number of capsule plant-1, 1000 seed weight (g), seed yield plant-1 (g), bud fly infestation (%), alternaria blight infestation (%) indicating the presence of considerable genetic variation among the parents and their crosses for the characters studied. Means squares due to lines were significant for all the characters except days to 50% flowering and alternaria blight infestation (%) indicating substantial genetic variability for general combining ability among lines. The mean squares due to testers were significant for all the characters except days to 50% flowering, days to maturity, number of branches plant-1 and alternaria blight infestation (%) indicating the considerable genetic variability for general combining ability among testers. The line × tester interactions were significant for all the characters except days to 50% maturity indicating genetic variability for specific combining ability among crosses. Among the 36 crosses studied IC0498517 × IC0499191, IC0499201 × IC0499191, Neela × IC0499156 were found most promising as they possessed high mean performance for yield along with negative significant SCA for seed yield plant-1, capsules plant-1, 1000 seed weight and bud fly resistance. Hence the hybrids identified from the present study were exploited further to obtain transgressive segregants for seed yield improvement in Lin seed crop.

Keywords

Linseed, combining ability, GCA, SCA

Conclusion

The presence of negative SCA effects for yield components in the above crosses table 6 indicates the presence of predominant role of additive gene action for yield components which is general situation observed in autogamous crops. These crosses therefore found to be the best crosses which could be exploited to the next generation for their use in varietal breeding programme in linseed.

References

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How to cite this article

Jadala Ravali, Beena M. Nair, Rani Jadhav, Prema R. Manapure and Achal B. Jagzape (2023). Combining Ability Analysis in Linseed (Linum usitatissimum L.). Biological Forum – An International Journal, 15(10): 1124-1128.