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  • 1
    Electronic Resource
    Electronic Resource
    Mapping quantitative trait loci associated with regeneration ability of seed callus in rice, Oryza sativa L. (1997)
    Springer
    Theoretical and applied genetics 95 (1997), S. 828-833 
    Details
    ISSN: 1432-2242
    Keywords: Key words Regeneration ability ; QTL ; Rice ; Oryza sativa L. ; Seed callus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Quantitative trait loci (QTL) controlling the regeneration ability of rice seed callus were detected using 245 RFLP markers and 98 BC1F5 lines derived from two varieties, ‘Nipponbare’ and ‘Kasalath’. Regeneration ability was evaluated by two indices: average number of regenerated shoots per callus (NRS) and regeneration rate (RR). The BC1F5 lines showed continuous segregation for both indices. Five putative QTL for NRS (tentatively named qRg1, qRg2, qRg4a, qRg4b and qRg4c) located on chromosomes 1, 2 and 4 were detected. Digenic interaction among these detected QTL was not significant (P〈0.01). Among the five QTL detected, four ‘Kasalath’ alleles and one ‘Nipponbare’ allele increased NRS. According to an estimate based on the nearest marker loci, the five QTL accounted for 38.5% of the total phenotypic variation of the BC1F5 lines. For RR, four putative QTL were detected on chromosomes 2 and 4, and all of these were in the same chromosomal regions as the NRS QTL. The four RR QTL accounted for 32.6% of the total phenotypic variation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050632
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  • 2
    Electronic Resource
    Electronic Resource
    Comparison of two indices for evaluating regeneration ability in rice (Oryza sativa L.) through a diallel analysis (1997)
    Springer
    Theoretical and applied genetics 94 (1997), S. 378-382 
    Details
    ISSN: 1432-2242
    Keywords: Key words Diallel analysis ; Regeneration ability ; Rice ; Oryza sativa L. ; Heritability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  A full diallel analysis was performed among seven rice cultivars, all of which showed different abilities of regeneration from seed-derived calli. Number of regenerated shoots and regeneration frequency were used as indices of regeneration ability. In both cases, additive effects were significant at the 0.1% level, and dominant genes had a positive effect, that is, they increased regeneration ability. Non-allelic interaction (epistasis) and maternal effects were not detected. Dominance effects were significant at the 1% and the 0.1% level when the number of regenerated shoots and regeneration frequency were used as indices, respectively. Average degree of dominance was 0.531 for the shoot regeneration index and 0.990 for the regeneration frequency index. Since broad-sense heritability was 0.919 for number of regenerated shoots and 0.736 for regeneration frequency, the former was considered to be a better index of regeneration ability than the latter.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050426
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    Paper (German National Licenses)
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