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Combining ability of soybean ( Glycine max ) for low phosphorus tolerance on acidic soils of Western Ethiopia
Author(s) -
Tesfaye Abush,
Githiri Mwangi,
Derera John,
Debele Tolessa
Publication year - 2020
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/pbr.12817
Subject(s) - point of delivery , biology , grain yield , agronomy , seedling , soil water , phosphorus , yield (engineering) , horticulture , botany , ecology , materials science , metallurgy
Determining the gene actions governing the inheritance of traits of interest has paramount importance in designing a breeding approach to improve the progeny populations. This study was undertaken to determine the combining ability of nine selected parental lines in the F 2 /F 3 segregating populations for low P tolerance. The experiment was laid out in an alpha lattice design in two locations, that is Mettu and Assossa of Western Ethiopia that are characterized by soils with low P and pH. General combining ability (GCA) effects were highly significant for grain yield, pod length, days to maturity and plant height, while specific combining ability (SCA) effects were highly significant for grain yield, 100‐seed weight, pod length and plant height. The parent Hardee‐1 was identified as the best general combiner for yield, number of seeds per pod, pod length, plant height and pod number. The results suggest that additive gene action was important for several of the studied traits, implied by significant GCA effect, which might indicate selection for these traits could be effective in later segregating generations.