Seed Set and Xenia Effects on Grain Iron and Zinc Density in Pearl Millet

Nath, K.; Govindaraj, Mahalingam; Pfeiffer, Wolfgang; Rao, A. S.

doi:10.2135/cropsci2014.04.0305

Cited by 15 publications

(15 citation statements)

References 17 publications

(22 reference statements)

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“…These suggested that increase simultaneous genetic improvement is feasible and is concurrent with earlier studies (Velu et al 2011;Govindaraj et al 2013;Kanatti et al 2014). This present finding with a recent study that demonstrated there was no xenia (pollen source) effect on grain Fe and Zn density in pearl millet (Rai et al 2015b) will enhance the breeding efficiency for biofortification.…”

Section: Resultssupporting

confidence: 86%

Effect of grain colour on iron and zinc density in pearl millet

Govindaraj

Rao

Shivade

et al. 2018

Ind. Jrnl. Gen. Plnt. Bree.

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Pearl millet (Pennisetum glaucum (L.) R. Br.) is a climate resilient crop with higher nutrition and serve as staple food for several million populations in semi-arid regions of India and Africa. To utilize the nutritional variability of this crop, biofortification research has been initiated to combat micronutrient malnutrition, chiefly iron (Fe) and zinc (Zn) deficiency. Large variability for grain Fe and Zn density has been reported in pearl millet and mostly the high-Fe lines had relatively dark grey grain colour. Therefore, this study was designed to investigate the effect of grain colour on grain Fe and Zn density in pearl millet. Two dark grey lines were crossed with five white grain colour lines to produce 10 hybrids. These hybrids were evaluated along with their parental lines for Fe and Zn density in two seasons. Highly significant Fe density differences observed for both parents and hybrids while significant Zn density differences observed only for hybrids. The significant genotype × environment (G × E) interaction observed for Fe and Zn density in hybrid trial. Interestingly, grain colour× environment variance was not significant for both micronutrients. Results indicate both micronutrients were not differed from white to grey grain lots among hybrids (70-103 mg kg-1 Fe density and 64-80 mg kg-1 Zn density), implying the genetic improvement of grain Fe and Zn density in pearl millet is highly feasible without compromising the grain colour preference of the farmers and consumers. Further, highly positive and significant correlation between these two micronutrient density irrespective of the grain colour recommended increase in Zn density as an associated trait while breeding for high Fe density in pearl millet.

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Section: Resultssupporting

confidence: 86%

Effect of grain colour on iron and zinc density in pearl millet

Govindaraj

Rao

Shivade

et al. 2018

Ind. Jrnl. Gen. Plnt. Bree.

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“…Studies in wheat ( Triticum aestivum L.) (Morgan, 1980; Dembinska et al, 1992; Weldearegay et al, 2012), maize ( Zea mays L.) (Herrero and Johnson, 1981), and rice ( Oryza sativa L.) (Jin et al, 2013) have shown reduction in seed set under terminal drought. It has been found that reduction in seed set increases the concentrations of Fe and Zn in pearl millet (Rai et al, 2015). Thus, possible reduction in seed set may also account, in part, for higher concentrations of these micronutrients under terminal drought.…”

Section: Resultsmentioning

confidence: 99%

Inbreeding Effects on Grain Iron and Zinc Concentrations in Pearl Millet

et al. 2017

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The magnitude, direction, and pattern of inbreeding effects on trait expression in selfing generations have a direct bearing on single‐plant and progeny‐based selection efficiency. In the present study on a pearl millet [Pennisetum glaucum (L.) R. Br.] biofortification initiative, initial random mated S0 bulks of three diverse composites and their S1 to S4 population bulks derived from four generations of selfing were evaluated for 2 yr under irrigated and terminal drought stress for iron (Fe) and zinc (Zn) concentrations. Both Fe and Zn concentrations were higher under terminal drought than under irrigated condition. Inbreeding had no significant effect on Fe and Zn concentrations in one composite and showed significant though marginal increase of both micronutrients in two composites. This finding, not unexpected, was in conformity with the earlier reports of predominantly additive gene effects and marginal partial dominance of genes determining low concentrations of these micronutrients observed in a low frequency of hybrids. The patterns of genetic changes in Fe concentration due to inbreeding were highly significantly and positively correlated with those in Zn concentration in all three composites. These results indicate that simultaneous single‐plant and progeny‐based early generation selection for Fe and Zn concentrations is likely to be effective to enhance the breeding efficiency for these micronutrients in pearl millet.

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“…One concern about this method has been raised that XRF, unlike ICP, does not lend for the analysis of dust contamination indicators such as aluminum (Al) and titanium (Ti). Following simple yet careful grain sampling protocols, it has been observed that dust contamination is not a significant factor influencing Fe density in pearl millet (Rai et al 2015a), and Zn density is not influenced by dust contamination (Paltridge et al 2012). Earlier studies in cereals showed that Al density exceeding 5 mg kg −1 is frequently associated with dust contamination, which leads to overestimates of Fe density (Pfeiffer and McClafferty 2007).…”

Section: Resultsmentioning

confidence: 99%

Energy-Dispersive X-ray Fluorescence Spectrometry for Cost-Effective and Rapid Screening of Pearl Millet Germplasm and Breeding Lines for Grain Iron and Zinc Density

Govindaraj

Kedar

Pfeiffer

et al. 2016

Communications in Soil Science and Plant Analysis

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Comparison of energy-dispersive X-ray fluorescence (XRF) and inductively coupled plasma-optical emission spectroscopy (ICP) for iron (Fe) and zinc (Zn) densities in pearl millet grain samples from 11 trials showed significant differences between these two methods for both micronutrients. XRF values were more often higher than the ICP values for both micronutrients, but the differences were significant in only 15-38% genotypes for Fe and in 7-25% genotypes for Zn across the trials. In 82% genotypes the differences between these two methods were ≤6 mg kg −1 for Fe; and in 88% genotypes, the differences were ≤4 mg kg −1 for Zn. There were highly significant and high positive correlations between ICP and XRF for both micronutrients. Selection of genotypes above the XRF trial mean for Fe/Zn included at least 30% top-ranking genotypes based on ICP. Therefore, XRF can be used for cost-effective and rapid screening of a large number of grain samples in pearl millet biofortification programs. ARTICLE HISTORY

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Seed Set and Xenia Effects on Grain Iron and Zinc Density in Pearl Millet

Cited by 15 publications

References 17 publications

Effect of grain colour on iron and zinc density in pearl millet

Effect of grain colour on iron and zinc density in pearl millet

Inbreeding Effects on Grain Iron and Zinc Concentrations in Pearl Millet

Energy-Dispersive X-ray Fluorescence Spectrometry for Cost-Effective and Rapid Screening of Pearl Millet Germplasm and Breeding Lines for Grain Iron and Zinc Density

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