Mineral distributions in milling fractions of low phytic acid wheat
Mineral distributions in milling fractions of low phytic acid wheat
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DOI：
10.2135/cropsci2006.01.0054
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发表时间：
2006-11-01
期刊：
影响因子：
2.3
通讯作者：
Souza, E. J.
中科院分区：
文献类型：
--
作者：
Guttieri, M. J.;Peterson, K. M.;Souza, E. J.
低植酸小麦（Triticum aestivum L.）是通过降低磷的主要储存形式和提高无机磷（Pi）水平来改善小麦营养品质的一种途径，无机磷更容易被人类和其他单胃动物吸收。通过诱变分离到小麦LPA突变体Js-12-LPA。2003年和2004年在重复大田试验中种植了具有'Grandin'*4/Js-12-LPA家系的LPA和野生型（WT）兄弟组合。在实验磨机上对籽粒进行研磨，测定了籽粒中P、植酸P （PAP）和Pi的分布。还测定了矿物浓度。LPA选育提高了面粉组分中π和Mg的浓度。LPA粉中Pi的浓度是WT粉的3倍，Mg的浓度比WT粉高25%。因此，低磷小麦的磷和镁似乎在籽粒内重新分配。Pi的增加与其他LPA突变体相似，这应该改善单胃动物饲喂全粒LPA小麦的矿物质营养。由于大多数小麦被磨成面粉和麸皮，LPA小麦中矿物质的详细分布应该有助于遗传学家和营养学家评估这种突变的价值。
Low phytic acid (LPA) wheat (Triticum aestivum L.) is one approach to improving nutritional quality of wheat by reducing the major storage form of P and increasing the level of inorganic P (Pi), which is more readily absorbed by humans and other monogastric animals. A LPA mutant of wheat, designated Js-12-LPA was isolated following mutagenesis. LPA and wild-type (WT) sib selections of hard red spring wheat families with the pedigree 'Grandin'*4/Js-12-LPA were grown in replicated field trials in 2003 and 2004. Grain was milled on an experimental mill, and the distribution of P, phytic acid P (PAP), and Pi was measured in milling fractions. Mineral concentrations also were determined. LPA selections had elevated concentrations of Pi and Mg in flour fractions. The concentration of Pi in LPA flour was three times the concentration in WT flour, and Mg concentration in LPA flour was 25% greater than in WT flour. Therefore, P and Mg in LPA wheat appear to be redistributed within the kernel. The increase in Pi is similar to that observed for other LPA mutants and should improve the mineral nutrition of monogastric animals fed whole grain LPA wheat. As most wheat is milled for flour and bran, the detailed distribution of minerals in the LPA wheat should assist geneticists and nutritionists in assessing the value of this mutation.