A simple method to evaluate genetic variation in grain zinc concentration by correcting for differences in grain yield

McDonald, G.; Genç, Yusuf; Graham, Robin D.

doi:10.1007/s11104-008-9555-y

Cited by 105 publications

(81 citation statements)

References 23 publications

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“…The Fe (qFE-1, qFE-9) and Zn (qZN-5, qZn-7) content of rice has been associated with some traits (total dry weight of whole plant, resistance to sheath blight, yield, and tillers per plant), and Cu has been correlated with grain size and weight (Lu et al 2008;Zeng et al 2005). Grain Zn concentration and grain yield are often inversely related (McDonald et al 2008). Ca and Fe-rich seepage can reduce P availability in soils with a strong pH buffer (Bakker et al 2005).…”

Section: Discussionmentioning

confidence: 99%

“…Zn and Fe deficiencies afflict over three billion people worldwide; nearly half of the world's cerealgrowing area is affected by soil Zn deficiency (Cakmak 2008). The past decade has seen growing interest in developing varieties of staple grain crops with enhanced concentrations of elements (Fe and Zn) to improve the nutritional quality of grain for human consumption (White and Broadley 2005;Cakmak 2008;McDonald et al 2008;Wissuwa et al 2008). Expressing the NAC genes can enhance grain Zn and Fe concentrations (Uauy et al 2006).…”

Section: Introductionmentioning

confidence: 99%

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Genotypic variation in element concentrations in brown rice from Yunnan landraces in China

Zeng

Zhang

Wang

et al. 2009

Environ Geochem Health

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The mineral elements present in brown rice play an important physiological role in global human health. We investigated genotypic variation of eight of these elements (P, K, Ca, Mg, Fe, Zn, Cu, and Mn) in 11 different grades of brown rice on the basis of the number and distance coefficients of 282 alleles for 20 simple sequence repeat (SSR) markers. Six-hundred and twenty-eight landraces from the same field in Yunnan Province, one of the largest centers of genetic diversity of rice (Oryza sativa L.) in the world, formed our core collection. The mean concentrations (mg kg(-1)) of the eight elements in brown rice for these landraces were P (3,480) > K (2,540) > Mg (1,480) > Ca (157) > Zn (32.8) > Fe (32.0) > Cu (13.6) > Mn (13.2). Mean P concentrations in brown rice were 6.56 times total soil P, so the grains are important in tissue storage of P, but total soil K is 7.82 times mean K concentrations in brown rice. The concentrations of the eight elements in some grades of brown rice, on the basis of the number and distance coefficients of alleles for 20 SSR markers for the landraces, were significantly different (P < 0.05), and further understanding of the relationship between mineral elements and gene diversity is needed. There was large variation in element concentrations in brown rice, ranging from 2,160 to 5,500 mg P kg(-1), from 1,130 to 3,830 mg K kg(-1), from 61.8 to 488 mg Ca kg(-1), from 864 to 2,020 mg Mg kg(-1), from 0.40 to 147 mg Fe kg(-1), from 15.1 to 124 mg Zn kg(-1), from 0.10 to 59.1 mg Cu kg(-1), and from 6.7 to 26.6 mg Mn kg(-1). Therefore, germplasm evaluations for Ca, Fe, and Zn concentrations in rice grains have detected up to sevenfold genotypic differences, suggesting that selection for high levels of Ca, Fe, and Zn in breeding for mass production is a feasible approach. Increasing the concentrations of Ca, Fe, and Zn in rice grains will help alleviate chronic Ca, Zn, and Fe deficiencies in many areas of the world.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Genotypic variation in element concentrations in brown rice from Yunnan landraces in China

Zeng

Zhang

Wang

et al. 2009

Environ Geochem Health

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“…Zn deficiency in human body reduces serum testosterone level, is linked to oligospermia, a severe immune dysfunction mainly affecting T helper cells, hyperammonemia, neurosensory disorders and decrease in lean body mass (Prasad 2008). To overcome this situation past decade has witnessed growing interest in developing varieties of staple grain crops with enhanced concentrations of Zn to improve the nutritional quality of grain for human consumption (White and Broadley 2005;Cakmak 2008;McDonald et al 2008;Wissuwa et al 2008). On the basis of recommended daily allowances (RDA) and bioavailability values, 22 μg/g grain Zn contents in polished rice grains have been decided (HarvestPlus 2005), but current status of consumable rice shows that it has only around 20 % of this value.…”

Section: Importance Of Zinc For Humansmentioning

confidence: 99%

Zinc – An Indispensable Micronutrient

Sharma

Patni

Shankhdhar

et al. 2012

Physiol Mol Biol Plants

221

124

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Availability of Zn to plant is hampered by its immobile nature and adverse soil conditions. Thus, Zn deficiency is observed even though high amount is available in soil. Root-shoot barrier, a major controller of zinc transport in plant is highly affected by changes in the anatomical structure of conducting tissue and adverse soil conditions like pH, clay content, calcium carbonate content, etc. Zn deficiency results in severe yield losses and in acute cases plant death. Zn deficiency in edible plant parts results in micronutrient malnutrition leading to stunted growth and improper sexual development in humans. To overcome this problem several strategies have been used to enrich Zn availability in edible plant parts, including nutrient management, biotechnological tools, and classical and molecular breeding approaches.

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“…The Berkut × Krichauff DH population was generated by crossing the Australian cultivar Krichauff with the CIMMYT cultivar Berkut. This population has already been used in other studies (McDonald et al, 2008;Huynh et al, 2008;Nguyen et al, 2011).…”

Section: Milling Time Studymentioning

confidence: 99%

Measuring Genotypic Variation in Wheat Seed Iron First Requires Stringent Protocols to Minimize Soil Iron Contamination

et al. 2014

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Measuring genotypic variation in Fe is an important task for plant breeders trying to biofortify wheat (Triticum aestivum L.), but levels of Fe are often enhanced in wheat seed due to soil derived contamination. Seed Al levels can be used to identify genotypes that are contaminated with Fe. The sources of contamination were identified and removed by milling the wheat grains in a modified Kett mill for 5 s before analysis. Thirty contaminated lines from Australia and 240 contaminated lines from Pakistan were cleaned for the validation of the 5 s milling method. Before cleaning, average Al concentrations were 10 mg kg−1. After cleaning, 183 out of the 240, or 76%, had Al less than 5.0 mg kg−1, and average Al levels were 4.2 mg kg−1. Therefore, the cleaning procedure was highly successful in reducing Al levels in contaminated samples. The ratio between Al removed and Fe removed was fairly consistent and followed a 1:1 relationship across two environments. Twenty genotypes of a wheat population were evaluated for their Fe concentration before and after cleaning and ranking changed significantly and cleaning also improved the precision of quantitative trait loci (QTL) analysis, with QTL QGFe.ta‐3B having a logarithm of the odds score of 1.1 before cleaning, which rose to 3.4 after cleaning. The method provides a valuable cleaning procedure for plant breeders wanting to analyze wheat seed and also provides evidence for reducing the influence of soil Fe contamination on seed by simply adjusting the Fe concentrations based on the level of Al in the grain.

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A simple method to evaluate genetic variation in grain zinc concentration by correcting for differences in grain yield

Cited by 105 publications

References 23 publications

Genotypic variation in element concentrations in brown rice from Yunnan landraces in China

Genotypic variation in element concentrations in brown rice from Yunnan landraces in China

Zinc – An Indispensable Micronutrient

Measuring Genotypic Variation in Wheat Seed Iron First Requires Stringent Protocols to Minimize Soil Iron Contamination

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