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Evaluating a conceptual model for drought tolerance

By: Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico) | Reynolds, M.P.
Contributor(s): Ribaut, J.M.|Poland, D [eds.] | Trethowan, R.M | Pfeiffer, W.H | Skovmand, B [coaut.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Mexico, DF (Mexico) CIMMYT : 2000ISBN: 970-648-052-8.Subject(s): Aba | Cereals | Drought AGROVOC | Drought resistance | Injurious factors | Research projects | CIMMYT | Plant breeding AGROVOCSummary: Wheat yields are reduced by 50-90% of their irrigated potential by drought on at least 60 million ha in the developing world. CIMMYT's wheat program is attempting to further improve drought tolerance by introgressing stress adaptive traits into empirically selected drought tolerant germplasm. Our current conceptual model for drought encompasses high expression of the following traits: seed size, coleoptile length, early ground cover, pre-anthesis biomass, stem reserves/remobilization, spike photosynthesis, stomatal conductance, osmotic adjustment, accumulation of abscisic acid (ABA), heat tolerance, leaf anatomical traits (waxiness, pubescence, rolling, thickness), high tiller survival, and stay-green.CIMMYT's germplasm collection is being screened for high expression of these traits. The traits will be tested systematically either in recombinant inbred lines, near isogenics, or synthetic hexaploids. Molecular markers will be developed for those traits showing genetic gains to selection.Collection: CIMMYT Staff Publications Collection
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Conference proceedings CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

CIMMYT Staff Publications Collection CIS-2516 (Browse shelf) 1 Available 649092
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Wheat yields are reduced by 50-90% of their irrigated potential by drought on at least 60 million ha in the developing world. CIMMYT's wheat program is attempting to further improve drought tolerance by introgressing stress adaptive traits into empirically selected drought tolerant germplasm. Our current conceptual model for drought encompasses high expression of the following traits: seed size, coleoptile length, early ground cover, pre-anthesis biomass, stem reserves/remobilization, spike photosynthesis, stomatal conductance, osmotic adjustment, accumulation of abscisic acid (ABA), heat tolerance, leaf anatomical traits (waxiness, pubescence, rolling, thickness), high tiller survival, and stay-green.CIMMYT's germplasm collection is being screened for high expression of these traits. The traits will be tested systematically either in recombinant inbred lines, near isogenics, or synthetic hexaploids. Molecular markers will be developed for those traits showing genetic gains to selection.

Global Wheat Program

English

R99-00CIMPU|0008|EE|3

INT1511

CIMMYT Staff Publications Collection

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Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT) © Copyright 2015. Carretera México-Veracruz. Km. 45, El Batán, Texcoco, México, C.P. 56237.
Si tiene cualquier pregunta, contáctenos a CIMMYT-Knowledge-Center@cgiar.org