کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5761401 | 1624649 | 2017 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Genetic impact of Rht dwarfing genes on grain micronutrients concentration in wheat
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم زراعت و اصلاح نباتات
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Genetic impact of Rht dwarfing genes on grain micronutrients concentration in wheat Genetic impact of Rht dwarfing genes on grain micronutrients concentration in wheat](/preview/png/5761401.png)
چکیده انگلیسی
Wheat is a major staple food crop providing about 20% of dietary energy and proteins, and food products made of whole grain wheat are a major source of micronutrients like Zinc (Zn), Iron (Fe), Manganese (Mn), Magnesium (Mg), Vitamin B and E. Wheat provides about 40% intake of essential micronutrients by humans in the developing countries relying on wheat based diets. Varieties with genetically enhanced levels of grain micronutrient concentrations can provide a cost-effective and sustainable option to resource poor wheat consumers. To determine the effects of commonly deployed dwarfing genes on wheat grain Zn, Fe, Mn and Mg concentrations, nine bread wheat (Triticum aestivum) and six durum wheat (T. turgidum) isoline pairs differing for Rht1 (=Â Rht-B1b) and one bread wheat pair for Rht2 (=Â Rht-D1b) dwarfing genes were evaluated for three crop seasons at N.E. Borlaug Research Station, Cd. Obregon, Sonora, Mexico. Presence of dwarfing genes have significantly reduced grain Zn concentration by 3.9Â ppm (range 1.9-10.0Â ppm), and Fe by 3.2Â ppm (range 1.0-14.4Â ppm). On the average, about 94Â ppm Mg and 6Â ppm Mn reductions occurred in semidwarf varieties compared to tall varieties. The thousand kernel weight (TKW) of semidwarf isolines was 2.6Â g (range 0.7-5.6Â g) lower than the tall counterparts whereas the plant height decreased by 25Â cm (range 16-37Â cm). Reductions for all traits in semidwarfs were genotype dependent and the magnitude of height reductions did not correlate with reductions in micronutrient concentrations in wheat grain. We conclude that increased grain yield potential of semidwarf wheat varieties is associated with reduced grain micronutrient concentrations; however, the magnitude of reductions in micronutrients varied depending on genetic background and their associated pleiotropic effect on yield components.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Field Crops Research - Volume 214, December 2017, Pages 373-377
Journal: Field Crops Research - Volume 214, December 2017, Pages 373-377
نویسندگان
Govindan Velu, Ravi P. Singh, Julio Huerta, Carlos Guzmán,