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  • 1
    Electronic Resource
    Electronic Resource
    QTL analysis of cooked rice grain elongation, volume expansion, and water absorption using a recombinant inbred population (2005)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 124 (2005), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The traits of elongation, volume expansion, and water absorption are very important in determining the quality of cooked rice grains. In this study, quantitative trait loci (QTL) analysis of these traits was performed using a recombinant inbred population derived from a cross between two indica cultivars, ‘Zhenshan 97’ and ‘Minghui 63,’ which are the parents of the most widely grown hybrid rice in China. Using a linkage map based on 221 molecular marker loci covering a total of 1796 cM, a total of 33 QTLs were identified for the nine traits tested. QTLs were detected on chromosomes 1–3, 5–9, and 11, respectively. The QTLs identified included three for cooked rice grain length elongation (chromosomes 2, 6, and 11), six for width expansion (chromosomes 1-3, 6, 9, and 11) and two for water absorption (chromosomes 2 and 6). Interestingly, a single QTL located near the wx gene on chromosome 6 seemed to influence all the traits tested for the cooked rice quality.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.2004.01055.x
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  • 2
    Electronic Resource
    Electronic Resource
    Dissection of component QTL expression in yield formation in rice (2005)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 124 (2005), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Yield and its components were investigated by using a population of 241 recombinant inbred lines (F9 RILs) derived from an elite hybrid rice cross of ‘Zhenshan 97’בMinghui 63′. Quantitative trait loci (QTLs) for causal analysing of yield traits were detected at different yield component (YC) influences by conditional and unconditional QTL mapping methods. The number of QTLs significantly affecting yield was different at component-special influence. Some QTLs controlling yield identified in one component influence were undetectable at the others. More QTLs for yield could be detected at different YC influences. It is possible to reveal that causal gene expression for yield could be different at different YC influences. Mapping QTLs for component effects of yield could help us in understanding the nature of cause-effect traits for the formation of grain yield.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.2005.01093.x
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  • 3
    Electronic Resource
    Electronic Resource
    The three important traits for cooking and eating quality of rice grains are controlled by a single locus in an elite rice hybrid, Shanyou 63 (1999)
    Springer
    Theoretical and applied genetics 99 (1999), S. 642-648 
    Details
    ISSN: 1432-2242
    Keywords: Key words Rice quality ; Amylose content ; Gel consistency ; Gelatinization temperature ; Genetic analysis ; Molecular marker
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  The cooking and eating quality of the rice grain is one of the most serious problems in many rice-producing areas of the world. In this study, we conducted a molecular marker-based genetic analysis of three traits, amylose content (AC), gel consistency (GC) and gelatinization temperature (GT), that are the most important constituents of the cooking and eating quality of rice grains. The materials used in the analysis included F2 seeds, an F2:3 population, and an F9 recombinant inbred-line population from a cross between the parents of ’Shanyou 63’, the most widely grown hybrid in rice production in China. Segregation analyses of these three generations showed that each of the three traits was controlled by a single Mendelian locus. Molecular marker-based QTL (quantitative trait locus) analyses, both by one-way analysis of variance using single marker genotypes and by whole-genome scanning with MAPMAKER/QTL, revealed a single locus that controls the expression of all three traits. This locus coincided with the Wx region on the short arm of chromosome 6, indicating that all three traits were either controlled by the Wx locus or by a genomic region tightly linked to this locus. This finding has provided clues to resolving the molecular bases of GC and GT in future studies. The results also have direct implications for the quality improvement of rice varieties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220051279
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  • 4
    Electronic Resource
    Electronic Resource
    Genetic bases of appearance quality of rice grains in Shanyou 63, an elite rice hybrid (2000)
    Springer
    Theoretical and applied genetics 101 (2000), S. 823-829 
    Details
    ISSN: 1432-2242
    Keywords: Key words Rice quality ; Grain shape ; Endosperm opacity ; Genetic analysis ; Molecular marker
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Appearance quality of the rice grain represents a major problem of rice production in many rice-producing areas of the world, especially in hybrid rice production in China. In this study, we conducted a molecular marker-based genetic analysis of the traits that are determinants of the appearance quality of rice grains, including traits specifying grain shape and endosperm opacity. The materials used in the analysis included an F2:3 population and an F10 recombinant inbred line population from a cross between the parents of Shanyou 63, the most widely grown rice hybrid in China. Molecular marker-based QTL (quantitative trait locus) analyses revealed that grain length and grain width were each controlled by a major QTL accounting for a very large proportion of the genetic variation, plus one or two minor QTLs each explaining a small proportion of the genetic variation. The major QTLs can be detected in both the F2:3 and recombinant inbred line population using both paddy rice and brown rice, whereas the minor QTLs were detected only occasionally. The QTL located in the interval of RG393-C1087 on chromosome 3 is the major locus for grain length, and the one in the interval RG360-C734a on chromosome 5 plays a major role in determining grain width. Similarly, white belly, which largely determines the opacity of the endosperm, is almost entirely controlled by a major locus on chromosome 5, located in the same genomic region as the major QTL for grain width. The implications of the results with respect to hybrid rice improvement were discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220051549
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    Paper (German National Licenses)
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