000			02957nam a22002537a 4500
001			G98673
003			MX-TxCIM
005			20171220150956.0
008			121211s ||||f| 0 p|p||0|| |
040			_aMX-TxCIM
090			_aCIS-7509
100	1		_9880 _aVelu, G. _gGlobal Wheat Program _8INT2983 _uWater, Food, Energy, and Innovation for a Sustainable World: ASA, CSSA, and SSSA International Annual Meetings; Florida (USA); 3-6 Nov 2013
245	0	0	_aBreeding advances in development of biofortified wheat cultivars
260			_c2013
300			_a1 page
500			_aAbstract only
520			_aDietary deficiency of essential micronutrients such as zinc (Zn) and iron (Fe) in human is very common, especially in countries with high consumptions of cereal-based diet. Genetic biofortification to improve Zn and Fe in bread wheat could greatly reduce micronutrient malnutrition worldwide. Wheat (Triticum aestivum L.) is the second most produced cereal crop, contributes 28% of the world?s dietary energy in many parts of the world. Therefore, there is a great need to improve nutritional value of wheat grain along with other essential core traits. Currently, the International Maize and Wheat Improvement Center (CIMMYT) is working to develop and disseminate high-yielding, rust-resistant wheat varieties with significantly increased Zn and Fe concentrations in preferred end-user types. It is expected that adoption of high Zn wheat varieties will be driven by its improved agronomic properties compared to current popular varieties, and breeding has focused on both Zn content and resistance to new strains of yellow and stem rusts. A targeted breeding program was initiated at CIMMYT in 2006 to develop wheat varieties that has 8 parts per million (ppm) increased Zn over the popular varieties (25 ppm) with competitive yields and resistant to rusts including Ug99 races of stem rust. Current breeding efforts at CIMMYT have focused on transferring genes for increased Zn from T. spelta and T. dicoccon based synthetics, landraces and other reported high Zn sources to high yielding elite wheat backgrounds. The first proof of concept results from the CIMMYT-derived high Zn lines tested at target environments showed high heritability along with high genetic correlations between locations, and a considerable number of entries exceeded the intermediate to full target level of Zn in trials across diverse environments suggests feasibility of developing competitive biofortified varieties with farmer- and consumer-preferred agronomic and end-use traits. Candidate lines identified with more than 75% of the Zn target level with better resistance to rusts are being tested in large scale multi-location trials in India and Pakistan and the first release of biofortified wheat is expected in India by 2014-15.
536			_aGlobal Wheat Program
546			_aEnglish
593			_aLucia Segura
594			_aINT2983
595			_aCSC
942			_cPRO
999			_c8740 _d8740