Quantitative trait loci for phytate in rice grain and their relationship with grain micronutrient content

Abstract

Journal articleIFPRI3; Breeding for Nutrition; ISI; HarvestPlusHarvestPlusP

Linkage mapping for grain iron and zinc content in F2population derived from the cross between PAU201 and Palman 579 in rice (Oryza sativaL.)

“…Although, substantial genetic diversity for mineral content has been observed in rice, but linkage mapping of genes/QTLs for iron and zinc contents has gained momentum recently (Stangoulis et al 2007;Garcia-Oliveira et al 2009;Norton et al 2010). Notably, out of eight putative QTLs for iron content identified in this study, seven were from "Palman 579" with six QTLs present on three chromosomes (chromosomes 2, 10 and 12).…”

“…But only a few studies on linkage mapping of QTLs for mineral content in rice (Garcia-Oliveira et al 2009;Norton et al 2010;Stangoulis et al 2007) have been reported. In this paper, we report the field evaluation of a F 2 population derived from the cross between "PAU201" (high yielding) and "Palman 579" (iron-rich) varieties of indica rice for yield and yield attributes.…”

Nutritionally Enhanced Staple Food Crops

“…More studies are needed to elucidate these relationships prior to using flag leaf for early selection of plants with potentially high seed Fe and Zn in breeding programs. Highly significant and positive correlations (0.82-0.99) between seed P and phytate have been reported for common bean, pearl millet, and rice (Lolas and Markakis 1975;Stangoulis et al 2007;Selvi and Rajarathinam 2009), while a low but positive and significant association was found for seed phytate with Fe and Zn in common bean (Cichy et al 2009). Further, several studies in wheat and common bean revealed a moderate but positive and significant association of seed P with Fe (0.42-0.55) and Zn (0.46-0.63) (Gelin et al 2007;Peleg et al 2009;Zhao et al 2009;Zhang et al 2010), whereas in pearl millet these relationships were negative and highly significant (À0.70 to À0.74) (Arulselvi et al 2007).…”

“…Both mineral concentration (amount per unit weight, i.e., mg kg À1 ) and mineral content (amount per seed, i.e., mg seed À1 ) are positively correlated (Cakmak et al 2004;Hacisalihoglu et al 2005;Stangoulis et al 2007) and either can be used to estimate the quantity of the minerals in the seeds (see Section V.A).…”

“…Many of the QTL (11) for both iron (5) and zinc (6) clustered on the upper half of LG B11, explaining up to 47.9% of phenotypic variance, suggesting an important locus useful for marker-assisted selection. Other QTL were identified on LG B3, B6, B7, and B9 for zinc and B4, B6, B7, and B8 for iron Blair et al 2009a Fe: 11 QTLs on six LGs, 8%-36% variation; Zn: 11 QTLs on four LGs, 9%-39% variation; a QTL on LG B1 (nearest to fin marker) accounted 34% variation for Fe and Zn, while another QTL on LG B6 (nearest to AGAT05 marker) accounted 36%-39% variation for Fe and Zn Cichy et al 2009 A locus on LG9 associated with Zn accumulation Gelin et al 2007 Two QTL for Fe (25% variation) and one QTL for Zn (15% variation) (Stangoulis et al 2007). In Barley, specific markers have been developed for a high zinc QTL on chromosome 2H (Sadeghzadeh et al 2010), while other QTLs have been identified by Lonergan et al (2009).…”