Wheat

Genome-Wide Association Mapping for Seedling and Adult Plant Resistance to Stripe Rust in Synthetic Hexaploid Wheat

Use of genetic diversity from related wild and domesticated species has made a significant contribution to improving wheat productivity. Synthetic hexaploid wheats (SHWs) exhibit natural genetic variation for resistance and/or tolerance to biotic and abiotic stresses. Stripe rust caused by (Puccinia striiformis f. sp. tritici; Pst), is an important disease of wheat worldwide. To characterise loci conferring resistance to stripe rust in SHWs, we conducted a genome-wide association study (GWAS) with a panel of 181 SHWs using the wheat 9K SNP iSelect array.

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Evaluation of advanced bread wheat genotypes for resistance to stem rust and yield stability

Stem rust (Puccinia graminis f. sp tritici) poses a major threat to wheat (Triticum aestivum L.) production worldwide. The interaction between wheat and pathogen in presence of favorable environment can cause a complete crop failure. This study was conducted with the objective to identify wheat genotypes with resistance to stem rust with high and stable yield under four environments in Kenya. Forty wheat genotypes were tested in two consecutive growing seasons, using an alpha lattice design with three replications. Host response to stem rust was recorded based on the modified Cobb scale.

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Enhancing the Vitamin and Mineral Content of Wheat and Maize Through Plant Breeding

More than half of the world's population suffers micronutrient undernourishment. The main sources of vitamins and minerals (iron, zinc, and vitamin A) for low-income rural and urban populations are staple foods of plant origin that often contain low levels or low bioavailability of these micronutrients. Biofortification aims to develop micronutrient-enhanced crop varieties through conventional plant breeding.

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Development of wheat germplasm for stem rust resistance in Eastern Africa

Wheat (Triticum aestivum) rust outbreak is the primary production constraint in Eastern Africa. Ethiopia, Kenya and Uganda are hot spots for the epidemic of rusts, due to higher rates of evolution of new pathogen races, especially of the virulent stem rust (Puccinia graminis) race, Ug99. The objective of this study was to identify sources of resistance to the major pathotypes of stem rust prevalent in some countries of Eastern Africa.

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Africa's Rising Demand for Wheat: Trends, Drivers, and Policy Implications

This article analyses trends in wheat consumption and imports in sub-Saharan Africa since 1980, and estimates the economic and demographic determinants of this rising demand for wheat. Results point to rising incomes, growing populations, and increasing women's labour-force participation as key drivers. Urban wheat-expenditure shares generally exceed rural ones and SSA's demand is met largely by imports and partly through domestic production on large-scale farms. Rising demand may therefore entail few farm-non-farm synergies and minimal prospects to spur broad-based economic development.

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Effect of cultivation frequency on growth, yield andyield components of bread wheat (Triticum Aestivum(L.) at Selmamer, Southern Ethiopia

A field experiment was carried out at Selmamer during the 2014 cropping season to determine the effects of cultivation frequency on growth, yield and yield components of bread wheat (Triticum aestivum L.). The treatments used in the study were seven cultivation frequencies (30 DAE, 45 DAE, 60 DAE, 30 and 45 DAE, 30 and 60 DAE, 45 and 60 DAE, 30, 45 and 60 DAE) and one control or no cultivation. The experimental design was a randomized complete block design (RCBD) with four replications.

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