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Title of Journal: Euphytica

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Abbravation: Euphytica

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Kluwer Academic Publishers

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DOI

10.1007/s00780-009-0118-8

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1573-5060

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Quantitative trait loci for phytate in rice grain

Authors: James C R Stangoulis BaoLam Huynh Ross M Welch EunYoung Choi Robin D Graham
Publish Date: 2006/08/11
Volume: 154, Issue: 3, Pages: 289-294
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Abstract

Phytate inositolhexaphosphate has an important role in plants but it also may have antinutritional properties in animals and humans While there is debate within the plant breeding and nutrition communities regarding an optimum level in grain there appears to be little information at the molecular level for the genetics of this trait and its association with important trace elements in particular Fe and Zn In this preliminary study quantitative trait loci QTL for grain phytates Zn and Fe in glasshousegrown rice lines from an IR64 × Azucena doubled haploid population were identified Correlations between phytate and essential nutrients were also studied Transgressive segregation was found for most traits Phytate and total P concentrations had one QTL in common located on chromosome five with the high concentration allele contributed from Azucena There were significant positive correlations between phytate and inorganic phosphorus P total P Fe Zn Cu and Mn concentrations for both grain concentration and content However the QTLs of phytate were not located on the same chromosomal regions as those found for Fe Zn and Mn suggesting that they were genetically different and thus using molecular markers in breeding and selection would modify the phytate level without affecting grain micronutrient densityFunding from the Asian Development Bank and HarvestPlus are gratefully acknowledged Analytical expertise from the Waite Analytical Service the delivery of seed from Dr Glenn Gregorio at IRRI online SSR markers database from Prof Susan McCouch assistance in QTL analysis by Dr Paul Lonergan and Dr Shengchu Wang statistical advice by Dr Trevor Hancock and valuable comments from the referees are also gratefully acknowledged

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