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- Title
HIGH NONADDITIVE GENE ACTION CONTROLS SYNCHRONOUS MATURITY IN MUNG BEAN.
- Authors
MARWIYAH, S.; SUTJAHJO, S. H.; TRIKOESOEMANINGTYAS; WIRNAS, D.; SUWARNO, W. B.
- Abstract
In mung bean, synchronous maturity is one of the breeding objectives for harvest efficiency and revealing its potential as a catch crop between major cropping seasons. The genetic control of synchronous maturity can be estimated by using a line × tester mating design that provides information on gene action, combining ability, and generating segregated populations. The objectives of this study were to a) assess the combining ability of mung bean genotypes, b) estimate the nature and magnitude of genetic components and gene action through the line × tester method, and c) select F1s for synchronous maturity in mung bean. This research was performed at IPB University Experimental Station, Bogor, Indonesia, from October 2018 to January 2019. The genetic material consisted of 10 lines, three testers, and 30 F1s. The experiment was arranged in a randomized complete block design with three replications. Data were collected on days to flowering, days to the first harvest, days to 90% harvest, harvest period, degree of the indetermination of generative phase, and degree of the indetermination of harvest period. Data analysis was performed to estimate general combining ability (GCA), specific combining ability (SCA), additive variance, dominance variance, and heritability. Combining abilities (GCA and SCA) for synchronous maturity traits were selected on the basis of negative and significant values. Lom2, VR10, VR480B, VR422H, Kawur, and Vima 1 were the best combiners for synchronous maturity traits. The expression of all studied traits indicated the low control of additive genes. Delaying selection to later segregating generations is suggested, and the reliable selection of transgressive recombinants is possible. The hybrids that were selected as a source to exploit transgressive segregation for synchronous maturity traits were VR10 × Vima 1, Lom2 × Vima 1, VR480B × Vima 1, VR60 × No.129, Lom 1 × Vima 2, and VR82 × Vima 2. This step can thereafter be followed by bulk or single seed descent method.
- Subjects
MUNG bean; CATCH crops; HETEROSIS in plants; GENES; BLOCK designs; HERITABILITY
- Publication
SABRAO Journal of Breeding & Genetics, 2021, Vol 53, Issue 2, p213
- ISSN
1029-7073
- Publication type
Article