Breeding high yielding micronutrient-rich wheat varieties with resistance to rusts
Material type:
ArticleLanguage: English Publication details: New Delhi (India) : BGRI, 2013.Subject(s):
In:
GRI (Borlaug Global Rust Initiative) 2013 Technical Workshop; New Delhi (India); 19-22 Aug 2013; Posters: Adoption or Rust Resistant Wheat p. 17Summary: Dietary deficiency of essential micronutrients such as zinc (Zn) and iron (Fe) is common in humans, especially in countries highly dependent on cereal-based diets. Wheat, with over 650 million tonnes of annual production, contributes 28% of the world?s dietary energy. Therefore genetic biofortification to improve Zn and Fe in bread wheat could greatly reduce micronutrient malnutrition. A targeted breeding program was initiated at CIMMYT in 2006 to develop wheat germplasm with an 8 ppm increase in Zn over the mean 25 ppm level in the widely grown varieties. These must also be competitive in yield and resistant to rusts, including Pgt race Ug99 and derivatives. High Zn-containing advanced lines developed by using high yielding, rust resistant parents were tested at KARI-Njoro, Kenya, for Ug99 resistance. Of the 200 lines screened during the 2012 off- and main-seasons, about 10 and 45% of entries had <10 and 20% stem rust severities, respectively, indicating good prospects of identifying candidate lines with acceptable levels of resistance to Ug99. Candidate lines with more than 75% of the Zn target level and better resistance to rusts are currently under test in large scale multi-location trials in India and Pakistan. The first release of biofortified wheat is expected in India by 2014-15
| Item type | Current library | Collection | Call number | Status | Date due | Barcode | Item holds | |
|---|---|---|---|---|---|---|---|---|
| Book part | CIMMYT Knowledge Center: John Woolston Library | CIMMYT Staff Publications Collection | CIS-7286 (Browse shelf(Opens below)) | Available |
Abstract Only
Dietary deficiency of essential micronutrients such as zinc (Zn) and iron (Fe) is common in humans, especially in countries highly dependent on cereal-based diets. Wheat, with over 650 million tonnes of annual production, contributes 28% of the world?s dietary energy. Therefore genetic biofortification to improve Zn and Fe in bread wheat could greatly reduce micronutrient malnutrition. A targeted breeding program was initiated at CIMMYT in 2006 to develop wheat germplasm with an 8 ppm increase in Zn over the mean 25 ppm level in the widely grown varieties. These must also be competitive in yield and resistant to rusts, including Pgt race Ug99 and derivatives. High Zn-containing advanced lines developed by using high yielding, rust resistant parents were tested at KARI-Njoro, Kenya, for Ug99 resistance. Of the 200 lines screened during the 2012 off- and main-seasons, about 10 and 45% of entries had <10 and 20% stem rust severities, respectively, indicating good prospects of identifying candidate lines with acceptable levels of resistance to Ug99. Candidate lines with more than 75% of the Zn target level and better resistance to rusts are currently under test in large scale multi-location trials in India and Pakistan. The first release of biofortified wheat is expected in India by 2014-15
Global Wheat Program
Text in English
INT0610|INT3329|N1203511|INT2843
CIMMYT Staff Publications Collection
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