Inheritance of early elongation ability in floating rice revealed by diallel and QTL analyses

In floating rice, stem elongation begins much earlier than in non-floating rice, which is the major survival mechanism for flooding. Inheritance of this early elongation ability was studied using diallel and quantitative trait locus (QTL) analyses. The diallel analysis was undertaken using a set of...

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Bibliographic Details
Published in:Theoretical and applied genetics 2004-06, Vol.109 (1), p.42-47
Main Authors: NEMOTO, K, UKAI, Y, TANG, D.-Q, KASAI, Y, MORITA, M
Format: Article
Language:English
Subjects:
Alleles
Biological and medical sciences
Blotting, Southern
Chromosome Mapping
Classical genetics, quantitative genetics, hybrids
Crosses, Genetic
Fundamental and applied biological sciences. Psychology
Genetics
Genetics of eukaryotes. Biological and molecular evolution
Genotype
Inbreeding
Oryza - genetics
Oryza - growth & development
Oryza rufipogon
Oryza sativa
Plant Stems - growth & development
Polymorphism, Restriction Fragment Length
Pteridophyta, spermatophyta
Quantitative Trait Loci - genetics
Quantitative Trait, Heritable
Vegetals
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Summary:In floating rice, stem elongation begins much earlier than in non-floating rice, which is the major survival mechanism for flooding. Inheritance of this early elongation ability was studied using diallel and quantitative trait locus (QTL) analyses. The diallel analysis was undertaken using a set of 6x6 half-diallel crosses involving four floating ("Goai", "Habiganj Aman VIII", "Badal 106", and Oryza rufipogon strain W120) and two non-floating ("Latisail" and "Patnai 23") parents. The additive gene effects were higher than the dominant effects. The dominant alleles were concentrated in the cultivated floating parents (("Goai", "Habiganj Aman VIII", "Badal 106"), whereas the recessive alleles were in the wild floating parent (W120). A QTL analysis using a "Patnai 23" x "Goai" F(2) population detected two putative QTLs. Of these QTLs, the one on chromosome 12 behaved as a partially dominant major gene that explained more than half of the total genetic variation.
ISSN:0040-5752
1432-2242
DOI:10.1007/s00122-004-1600-5