Pattern of Transgressive Segregants for Fibre Quality Traits in Segregating Populations derived from an intra-hirsutum cross in Cotton (Gossypium hirsutum L.)

Author: Revanasiddayya, J.M. Nidagundi, B. Fakrudin, P.H. Kuchanur, Yogeesh L.N., S. G. Hanchinal, T.C. Suma and Gururaj Sunkad

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Abstract

One of the challenge in plant breeding is retrieving and identifying most potential transgressive segregants in segregating population. The present study was aimed at understanding the pattern of transgressive segregants (TS) for fibre quality traits in different segregating population’s viz., F2, B1F2, B2F2 and F3 derived from an intra-hirsutum cross in upland cotton. Among the four populations, number of TS were found to be highest in F2 population followed by F3, B2F2 and B1F2 population for UHML and micronaire value owing to their population size while pattern of superiority was F2>F3>B1F2>B2F2 for fibre strength. When TS were estimated using different methods viz., parental lines (P1 and P2), mid-parental value, F2 population mean and standard checks (BGDS-1063 and BGDS-1033), number of TS were found to be the highest over check BGDS-1063 in F2(70 (2.4 %)) followed by F3(16 (2.1 %)), B1F2 (2 (0.5 %)) and B2F2 (9 (2.3 %)) populations for UHML and fibre strength while for micronaire value, their number were more over F2 population mean compared to other methods. The segregants viz., RAH1-F2-10 (33.79 mm), RAH1-F3-47 (32.64 mm), RAH1-B₁F2-39 (30.51 mm) andRAH1-B2F2-30 (31.98 mm) were identified as the most potential transgressive segregants for UHML in F2, F3, B1F2 and B2F2 populations, respectively. The present study concluded that the pattern in number of transgressive segregants varies in different segregating populations (F2, F3, B1F2 and B2F2) according to differences in population size and method of estimation. Most potential transgressive segregants for fibre quality traits are identified with can be used to derive superior homozygous lines for the concerned trait.

Keywords

Cotton, Transgressive segregants, Segregating populations, UHML, Fibre strength, Micronaire value

Conclusion

The pattern of number of transgressive segregants varies in different segregating populations (F2, F3, B1F2 and B2F2) according to differences in population size. Further, this study inferred that the number of transgressive segregants varies when worked out using different methods i.e. P1, P2, mid-parental value, F2 mean or standard checks.

References

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How to cite this article

Revanasiddayya, J.M. Nidagundi, B. Fakrudin, P.H. Kuchanur, Yogeesh L.N., S. G. Hanchinal, T.C. Suma and Gururaj Sunkad (2023). Pattern of Transgressive Segregants for Fibre Quality Traits in Segregating Populations derived from an intra-hirsutum cross in Cotton (Gossypium hirsutum L.). Biological Forum – An International Journal, 15(2): 1217-1223.