Nutrient Rich Quality Rice- A Journey to Healthy Life

Tripathy, Swapan K.

doi:10.15406/apar.2017.07.00268

Cited by 11 publications

(13 citation statements)

References 23 publications

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“…The world population is increasing at an exponential rate; however, current annual genetic gain in rice production is insufficient to meet future food requirements [2], demanding continuous efforts to breed high yielding and more nutritious rice cultivars. Thus, there is an urgent need to boost global rice production, along with nutritional quality, for sustainable food and nutritional security [3].…”

Section: Introductionmentioning

confidence: 99%

Grain Fe and Zn contents linked SSR markers based genetic diversity in rice

Raza¹,

Riaz²,

Saher³

et al. 2020

PLoS ONE

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Rice is critical for sustainable food and nutritional security; however, nominal micronutrient quantities in grains aggravate malnutrition in rice-eating poor populations. In this study, we evaluated genetic diversity in grain iron (Fe) and zinc (Zn) contents using trait-linked simple sequence repeat (SSR) markers in the representative subset of a large collection of local and exotic rice germplasm. Results demonstrated that aromatic fine grain accessions contained relatively higher Fe and Zn contents in brown rice (BR) than coarse grain accessions and a strong positive correlation between both mineral elements. Genotyping with 24 traitlinked SSR markers identified 21 polymorphic markers, among which 17 demonstrated higher gene diversity and polymorphism information content (PIC) values, strongly indicating that markers used in current research were moderate to highly informative for evaluating the genetic diversity. Population structure, principal coordinate and phylogenetic analyses classified studied rice accessions into two fine grain specific and one fine and coarse grain admixture subpopulations. Single marker analysis recognized four ZnBR and single FeBR significant marker-trait associations (MTAs) contributing 15.41-39.72% in total observed phenotypic variance. Furthermore, high grain Fe and Zn contents linked marker alleles from significant MTAs were also identified. Collectively, these results indicate a wide genetic diversity exist in grain Fe and Zn contents of studied rice accessions and reveal perspective for marker-assisted biofortification breeding.

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Section: Introductionmentioning

confidence: 99%

Grain Fe and Zn contents linked SSR markers based genetic diversity in rice

Raza¹,

Riaz²,

Saher³

et al. 2020

PLoS ONE

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“…However, rice production must be increased by additional 8-10 million tons each year and there is a strong impetus to improve the nutritional value with multiple essential vitamins and minerals to meet food and nutritional demands of a growing population 2 . Thus, there is an urgent need to breed for rice varieties with improved yield and nutritional value for sustaining global food and nutritional security 3,4 .…”

mentioning

confidence: 99%

Genetic Analysis of Agronomic Traits and Grain Iron and Zinc Concentrations in a Doubled Haploid Population of Rice (Oryza sativa L.)

Calayugan

Formantes

Amparado

et al. 2020

Sci Rep

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The development of micronutrient dense rice varieties with good agronomic traits is one of the sustainable and cost-effective approaches for reducing malnutrition. Identification of QTLs for high grain Fe and Zn, yield and yield components helps in precise and faster development of high Fe and Zn rice. We carried out a three-season evaluation using IR05F102 x IR69428 derived doubledhaploid population at IRRI. Inclusive composite interval mapping was carried out using SNP markers and Best Linear Unbiased Estimates of the phenotypic traits. A total of 23 QTLs were identified for eight agronomic traits and grain Fe and Zn concentration that explained 7.2 to 22.0% PV. A QTL by environment interaction analysis confirmed the stability of nine QTLs, including two QTLs for Zn on chromosomes 5 and 12. One epistatic interaction for plant height was significant with 28.4% PVE. Moreover, five QTLs were identified for Fe and Zn that harbor several candidate genes, e.g. OsZIP6 on QTL qZn 5.1. A number of QTLs were associated with a combination of greater yield and increased grain Zn levels. These results are useful for development of new rice varieties with good agronomic traits and high grain Zn using MAS, and identification of genetic resources with the novel QTLs for grain Zn.

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“…Rice grain is relatively low in some essential micronutrients such as iron (Fe), zinc (Zn) and calcium (Ca) as compared to other crops. 20 Rice varieties vary in mineral content. 21 Brown rice is an important source of vitamins and minerals.…”

Section: Minerals and Vitaminsmentioning

confidence: 99%

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2017

APAR

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Malnutrition continues to be a crucial problem particularly in developing countries. For this, rice breeding needs to be reoriented to improve cooking quality, glycemic load, protein, amino acid, micronutrient, vitamin, phenolic and flavonoid content while increasing the yield potential. Indeed, the task is challenging as most of the traits relating to quality and nutrient status in rice are complex. In this pursuit, the authors reviewed the general background of malnutrition; explore the genetic basis for improvement of nutritional status including quality aspects and possible breeding perspective to mitigate the problem. This would certainly help breeders to develop nutritionally rich rice varieties.

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Nutrient Rich Quality Rice- A Journey to Healthy Life

Cited by 11 publications

References 23 publications

Grain Fe and Zn contents linked SSR markers based genetic diversity in rice

Grain Fe and Zn contents linked SSR markers based genetic diversity in rice

Genetic Analysis of Agronomic Traits and Grain Iron and Zinc Concentrations in a Doubled Haploid Population of Rice (Oryza sativa L.)

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