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- Title
IMPLICATION OF GENE ACTION AND HERITABILITY UNDER STRESS AND CONTROL CONDITIONS FOR SELECTION IRON TOXICITY TOLERANT IN RICE.
- Authors
Nugraha, Yudhistira; Ardie, Sintho Wahyuning; Suwarno; Ghulamahdi, Munif; Aswidinnoor, Hajrial
- Abstract
Iron toxicity is major constraint of rice production in irrigated-lowland. The Improvement of tolerant rice cultivar to iron toxicity requires the information of some genetics parameters related to selected characters. This study was aimed to estimate gene action and heritability of the grain yield and its component under iron-toxic stress and control field conditions in rice. The iron-toxic tolerant rice cultivars, Pokkali and Mahsuri were crossed with the sensitive cultivar, Inpara5 to develop six generation populations. The breeding materials were grown in the iron toxicity site and control in Taman Bogo, Lampung Indonesia in the wet season from December 2013 to March 2014. The sensitive parent and BC1P1 had lower stress tolerance index (STI) compared to the tolerant parent F1, F2 and BC1P2. The grain yield and its component were fitted to the best model in five parameters which were more prominent with interactive epistasis of duplicate and complementary gene action. The heritability's under control were more higher compared to iron toxicity stress condition. Delaying selection to later generations and combining with the shuttle breeding between stressed and controlled environments were the best strategy for improving the grain yield and tolerance to iron toxicity in rice.
- Subjects
HERITABILITY; EPISTASIS (Genetics); RICE yields; TOXICOLOGY of iron; RICE field irrigation
- Publication
Agrivita: Journal of Agricultural Science, 2016, Vol 38, Issue 3, p282
- ISSN
0126-0537
- Publication type
Article
- DOI
10.17503/agrivita.v38i3.740