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Wheat breeding in Mexico : delivering newly developed advanced lines

By: Autrique, E.
Contributor(s): Guzman, C | Singh, P.K | Caixia Lan | Randhawa, M.S | Huerta-Espino, J | Singh, R.P.
Material type: materialTypeLabelChapterPublisher: Mexico : CIMMYT, 2016Subject(s): Wheat | Breeding | Mexico AGROVOC In: Proceedings of the 2nd International TRIGO Wheat Yield Potential p. 42-52Summary: Over the past 70 years, Mexican wheat breeding has delivered varieties with higher yields and traits with genetic disease resistance to producers in the various wheat-growing areas. Co-evolution of hosts and pathogens (mainly rusts), sparks a need for the constant development of new sources of resistance and long-term strategies like durable resistance. Annually, CIMMYT's bread wheat breeding program tests thousands of newly developed advanced lines for yield, disease resistance, tolerance to heat and drought, and other important traits. In the summer of 2015, 1460 advanced lines were selected, based on yield potential, from 9100 lines and were evaluated for resistance to leaf and yellow rust, Septoria and Fusarium head blight, at CIMMYT's Toluca and El Batan experimental stations. Wheat industrial processing quality of the selected lines was also evaluated. More than 88% of the lines were resistant to yellow rust (less than 5% of infection), based on prevalent races is Mexico. For Septoria, 426 lines showed 50% infection or less and were selected for a second year of testing. Twenty percent of the lines showed no more than 5% infection for Fusarium head blight and some lines were better than the resistant checks. A large number of lines also demonstrated good industrial processing quality. Pyramiding different traits into a single line requires a constant breeding process to make improved varieties available for wheat producers in Mexico and elsewhere.
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Over the past 70 years, Mexican wheat breeding has delivered varieties with higher yields and traits with genetic disease resistance to producers in the various wheat-growing areas. Co-evolution of hosts and pathogens (mainly rusts), sparks a need for the constant development of new sources of resistance and long-term strategies like durable resistance. Annually, CIMMYT's bread wheat breeding program tests thousands of newly developed advanced lines for yield, disease resistance, tolerance to heat and drought, and other important traits. In the summer of 2015, 1460 advanced lines were selected, based on yield potential, from 9100 lines and were evaluated for resistance to leaf and yellow rust, Septoria and Fusarium head blight, at CIMMYT's Toluca and El Batan experimental stations. Wheat industrial processing quality of the selected lines was also evaluated. More than 88% of the lines were resistant to yellow rust (less than 5% of infection), based on prevalent races is Mexico. For Septoria, 426 lines showed 50% infection or less and were selected for a second year of testing. Twenty percent of the lines showed no more than 5% infection for Fusarium head blight and some lines were better than the resistant checks. A large number of lines also demonstrated good industrial processing quality. Pyramiding different traits into a single line requires a constant breeding process to make improved varieties available for wheat producers in Mexico and elsewhere.

Wheat CRP FP3 - Global partnership to accelerate genetic gain in farmers field

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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