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QTL Analysis for Grain Iron and Zinc concentrations in Two O. nivara Derived Backcross Populations

Rice science 2018年第4期25卷 197-207页

作者： B. P. M. SWAMY K. KALADHAR1, K. ANURADHA Anil K. BATCHU T. LONGVAH N. SARLA Indian Institute of Rice Research Rajendranagar Hyderabad 500030 India Plant Breeding Division International Rice Research Institute DAPO Box 7777 Metro Manila the Philippines International Crops Research Institute on Semi Arid Tropics Patancheru Hyderabad 502324 India National Institute of Nutrition Hyderabad 500007 India

Identification of quantitative trait loci （QTLs） for grain mineral elements can assist in faster and more precise development of micronutrient dense rice varieties through marker-assisted breeding. In the present study, QTLs were mapped for fe and Zn concentrations in two BC2F3 mapping populations derived from the crosses of O. sativa cv Swarna with two different accessions of O. nivara. In all, 10 and 8 QTLs were identified for grain fe and Zn concentrations in population 1, and 7 and 5 QTLs were identified in population 2, respectively. Eighty percent of the QTLs detected in both populations were derived from O. nivara. Five QTLs for fe and three QTLs for Zn explained more than 15% phenotypic variance either in interval or composite interval mapping. The locations of O. nivara derived QTLs such as qfe2.1, qfe3.1, qfe8.2 and qZn12.1 were consistently identified in both the populations. Epistatic interaction was observed only between RM106 and RM6 on chromosome 2 and between RM22 and RM7 on chromosome 3 for fe concentration in population 1. Sixteen candidate genes for metal homeostasis were found to co-locate with 10 QTLs for fe and Zn concentrations in both the populations. Most of the fe and Zn QTLs were found to co-locate with QTLs for grain yield and grain quality traits. Some of the major effect QTLs identified can be used to improve rice grain fe and Zn concentrations.

关键词： biofortification micronutrient fe concentration Zn concentration rice wild rice quantitative trait locus gene marker assisted breeding

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Genotype × Environment Interaction for Iron concentration of Rice in Central Java of Indonesia

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Rice science 2011年第1期18卷 75-78页

作者： Suwarto Nasrullah Plant Breeding Laboratory Agriculture Faculty Jenderal Soedirman University Biometric Laboratory Agriculture Faculty Gadjah Mada University

To explore the effect of genotype and genotype x environment interaction on fe concentration in rice grains, fe concentrations of 10 genotypes were analyzed across eight paddy field environments during 2007-2008 using the AMMI-biplot method. Experiments were conducted using a randomized completely block design with three replications in eight environments. Results indicated that environment （E）, genotype （G） and genotype x environment interaction （GE） significantly affected fe concentration in rice grains. Environment explained 74.43 % of total （G＋E＋GE） variation, whereas G and GE captured 5.60% and 19.67%, respectively. Rice genotype Barumun was desirable in terms of the highest ability and stability for fe concentration in rice grains. Environment in genotype Cilongok was the best representative of the overall environments and the most powerful to discriminate rice genotypes.

关键词： fe concentration genotype genotype x environment interaction AMMI-biplot method rice

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In Situ Determination of Iron Distribution and Oxidation State in Broiler Duodenal Wall by Synchrotron Radiation μ-XRF and μ-XANES

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Journal of Northeast Agricultural University(English Edition) 2020年第2期27卷 73-80页

作者： Sun Rui-tao Liu Da-sen Zhang Mei-mei Babarinde Emmanuel Liu Hua-wei Zhang Peng Shi Ru-bin College of Animal Sciences and Technology Northeast Agricultural UniversityHarbin 150030China College of Science Northeast Agricultural UniversityHarbin 150030China College of Life Sciences Northeast Agricultural UniversityHarbin 150030China

Micro-X-ray fluorescence(μ-XRF)and micro-X-ray absorption near edge structure(μ-XANES)have not been widely used in animal *** situ determination of iron distribution and oxidation state in broiler duodenal wall was done byμ-XRF andμ-XANES *** newly hatched healthy(1-day-old)Arbor Acres commercial male broilers were used in this *** chicks were fed a corn-soybean meal basal diet(96.00 mg of fe/kg diet)from the 1st day to the 21st day,but were fed a semi-purified diet(12.50 mg of fe/kg diet)after 21 days to deplete the body fe *** the 28th day,after an overnight fast,all the birds were randomly allotted to four different fe sources[feSO4,fe-Gly(II),feCl3 and fe-Gly(Ⅲ)].Three points five mL nutrient solution was injected to a broiler’s duodenum by technology of in situ ligated intestinal loops and a perfusion group without fe sources added to the media was designed to exclude the effect of endogenous *** incubated for 30 min,duodenal midpieces sections were collected for analyses byμ-XRF andμ-XANES *** was found that fe concentration for ferrous fe sources[feSO4 and fe-Gly(Ⅱ)]was significantly higher than that for ferric fe sources[feCl3 and fe-Gly(Ⅲ)]in the duodenal wall,moreover,fe-Gly(Ⅱ)group samples had the largest amount of fe.μ-XANES spectra of fe for the four sources were basically the same in the duodenal wall,which indicated that despite the ferric iron supplied to duodenum,ferrous iron could also be absorbed into the duodenal wall.

关键词： μ-XRF μ-XANES fe source fe concentration duodenal wall

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