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Diallel analysis of soybean (Glycine max L.) for biomass yield and root characteristics under low phosphorus soil conditions in western Ethiopia
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Date
2023Type
Review Status
Peer ReviewTarget Audience
Scientists
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Show full item recordAbstract/Description
Combining ability studies under low soil P conditions provides useful information on the inheritance of important traits to improve soybean for low P tolerance. The study aimed at determining the combining ability and gene actions of biomass yield and root traits in soybean under low phosphorus conditions. Nine parental genotypes and their 36 half diallel F2/F3 progenies were evaluated at two locations in Ethiopia on soils of low P availability. Highly significant (P<0.01) general combining ability (GCA) were found for all the traits and specific combining ability (SCA) for root dry weight and root fresh weight; while the SCA effects of all the rest of the traits were significant (P<0.05). The higher relative contributions of GCA over SCA revealed the preponderance of additive gene action in the inheritance of biomass yield, root dry weight, biomass dry weight, root volume, and root fresh weight with respective relative GCA:SCA contributions of (60.6, 39.4), (50.4, 49.6), (54.9, 45.1), (51.1, 48.9), and (52.1, 47.9); while the narrow-sense heritability was high (34.3%) only for biomass yield. Hardee-1 displayed significant (P<0.05) and positive GCA effects for most of the studied traits, and several crosses involving this parent showed superior performances. The traits i.e., biomass yield, biomass dry weight, root volume and root fresh weight showed highly (P<0.001) correlation with grain yield. Thus, breeding programs aiming to improve soybean for biomass yield and root traits under low-P condition can use Hardee-1 as a parent.
Acknowledgements
The authors are grateful to the African Center for Crop Improvement (ACCI) for the PhD study opportunity that enabled us to conduct this research.
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Permanent link to this item
https://hdl.handle.net/20.500.12478/8055IITA Authors ORCID
Abush Tesfayehttps://orcid.org/0000-0002-9245-360X
Samuel Adewalehttps://orcid.org/0000-0002-0331-7201
Godfree Chigezahttps://orcid.org/0000-0002-9235-0694
John Dererahttps://orcid.org/0000-0003-3715-0689
Digital Object Identifier (DOI)
https://dx.doi.org/10.1371/journal.pone.0281075