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INHERITANCE OF SOYBEAN POD NUMBER TRAIT ON ACID SOIL

Keywords: Al-toxicity , gene action , heritability , pod number trait , soybean

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Abstract:

Al-toxicity stressed soybean will show its tolerance response by changing pod number per plant. Hence, Al-toxicity tolerance of soybean can be predicted using that character. The objective of the research was to study inheritance of pod number trait of soybean on acid soil. Development of base population was carried out by crossing the genotypes of W3898-14-3 with MLGG 0583 and MLGG 0709. Thirteen populations resulting from soybean base population were grown on Ultisol with Al saturity of 32.84%. The design was randomized completely block design with three replications. Results showed that based on pod number per plant, soybean tolerance was polygenically controlled, where the gene action was additive and there was no allelic and non-allelic interaction genes. Narrow sense heritability was low, while broad sense heritability was classified as high. Based on high broad sense heritability and no genes interaction and polygenically gene control of pod number trait, selection can be carried out by choosing plants with low intensity of selection at medium generation to accelerate selection without losing many potential plants.Keywords: Al-toxicity, gene action, heritability, pod number trait, soybeanAl-toxicity stressed soybean will show its tolerance response by changing pod number per plant. Hence, Al-toxicity tolerance of soybean can be predicted using that character. The objective of the research was to study inheritance of pod number trait of soybean on acid soil. Development of base population was carried out by crossing the genotypes of W3898-14-3 with MLGG 0583 and MLGG 0709. Thirteen populations resulting from soybean base population were grown on Ultisol with Al saturity of 32.84%. The design was randomized completely block design with three replications. Results showed that based on pod number per plant, soybean tolerance was polygenically controlled, where the gene action was additive and there was no allelic and non-allelic interaction genes. Narrow sense heritability was low, while broad sense heritability was classified as high. Based on high broad sense heritability and no genes interaction and polygenically gene control of pod number trait, selection can be carried out by choosing plants with low intensity of selection at medium generation to accelerate selection without losing many potential plants.

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