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Mapping of quantitative trait loci for basmati quality traits in rice ( Oryza sativa L.)

Mapping of quantitative trait loci for basmati quality traits in rice ( Oryza sativa L.),10.1007/s11032-007-9108-8,Molecular Breeding,Yellari Amarawat

Mapping of quantitative trait loci for basmati quality traits in rice ( Oryza sativa L.)   (Citations: 21)
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Traditional basmati rice varieties are very low yielding due to their poor harvest index, tendency to lodging and increasing susceptibility to foliar diseases; hence there is a need to develop new varieties combining the grain quality attributes of basmati with high yield potential to fill the demand gap. Genetic control of basmati grain and cooking quality traits is quite complex, but breeding work can be greatly facilitated by use of molecular markers tightly linked to these traits. A set of 209 recombinant inbred lines (RILs) developed from a cross between basmati quality variety Pusa 1121 and a contrasting quality breeding line Pusa 1342, were used to map the quantitative trait loci (QTLs) for seven important quality traits namely grain length (GL), grain breadth (GB), grain length to breadth ratio (LBR), cooked kernel elongation ratio (ELR), amylose content (AC), alkali spreading value (ASV) and aroma. A framework molecular linkage map was constructed using 110 polymorphic simple sequence repeat (SSR) markers distributed over the 12 rice chromosomes. A number of QTLs, including three for GL, two for GB, two for LBR, three for aroma and one each for ELR, AC and ASV were mapped on seven different chromosomes. While location of majority of these QTLs was consistent with the previous reports, one QTL for GL on chromosomes 1, and one QTL each for ELR and aroma on chromosomes 11 and 3, respectively, are being reported here for the first time. Contrary to the earlier reports of monogenic recessive inheritance, the aroma in Pusa 1121 is controlled by at least three genes located on chromosomes 3, 4 and 8, and similar to the reported association of badh2 gene with aroma QTL on chromosome 8, we identified location of badh1 gene in the aroma QTL interval on chromosome 4. A discontinuous 5 + 3 bp deletion in the seventh exon of badh2 gene, though present in all the RILs with high aroma, was not sufficient to impart this trait to the rice grains as many of the RILs possessing this deletion showed only mild or no aroma expression.
Journal: Molecular Breeding - MOL BREEDING , vol. 21, no. 1, pp. 49-65, 2008
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    • ...Amarawathi et al. (2008) detected two additional QTLs controlling fragrance in rice and suggested that OsBADH1, a homolog of BADH2, located on rice chromosome 4, is one of candidate genes attributable to fragrance in rice...
    • ...In rice, besides the OsBADH2 gene on chromosome 8 that strongly affects strength of fragrance, Lorieux et al. (1996) reported two minor QTLs each on chromosome 4 and chromosome 12 also contribute to fragrance in rice, while Amarawathi et al. (2008) identified two minor QTLs each on chromosome 3 and chromosome 4 influence level of the fragrance...
    • ...Searching rice genome database revealed that OsBADH1 was likely a candidate gene for QTL for fragrance on rice chromosome 4 (Amarawathi et al. 2008)...

    Ruangchai Juwattanasomranet al. A SNP in GmBADH2 gene associates with fragrance in vegetable soybean v...

    • ...In fact, the short arm of chromosome 6 contains major QTLs related to flowering time [36] and the waxy gene, which may contribute to grain quality [37- 39], and several QTLs that control grain quality are located in the middle of chromosome 12 (Gramene QTL Database, http://www.gramene.org/qtl/)...

    Toshio Yamamotoet al. Fine definition of the pedigree haplotypes of closely related rice cul...

    • ...Although grain shape has received increased attention since the 1990s, most mapping populations used in grain shape-targeted QTL mapping studies were derived from parents whose cultivars usually produce common sized grains (TGW from 20 to 32 g) [2,7,8,11,31-34]...

    Xufeng Baiet al. Genetic dissection of rice grain shape using a recombinant inbred line...

    • ...More recently, researchers have identified genes and quantitative trait loci (QTL) associated with grain morphology (Fan et al. 2006; Li et al. 2004; Shomura et al. 2008; Takano-Kai et al. 2009), grain weight, and filling (Song et al. 2007; Wang et al. 2008) and cooking quality (Aluko et al. 2004; Amarawathi et al. 2008; Bao et al. 2004; Bradbury et al. 2005; Chen et al. 2006; Li et al. 2004; Liu et al. 2000; Wan et al. 2004; Zheng et al. ...

    Yong-Gu Choet al. Identification of quantitative trait loci for physical and chemical pr...

    • ... were used for map construction with LOD of 3.0 and a minimal distance of 50 cM. This resulted in mapping of 101 markers (71 SSR, 21 RAPD, 8 ISSR and 1 EST) covering a total length of 1,529 cM in 17 linkage groups with an average distance of 15.1 cM (Fig. 1). This kind of large number of linkage groups was also reported earlier in Bala 9 Azucena (17 linkage groups) (Price and Tomos 1997) and Pusa 1,121 9 Pusa 1,342 (17 linkage groups) ( ...

    Selvaraj Michael Gomezet al. Molecular mapping and location of QTLs for drought-resistance traits i...

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