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The application of molecular markers in wheat improvement at CIMMYT

By: William, M.D.H.M | Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico).
Contributor(s): Ayala, L [coaut.] | Hoisington, D.A [coaut.] | Khairallah, M.M [coaut.] | Kohli, M.M.|Francis, M [eds.] | Mujeeb-Kazi, A [coaut.] | Singh, R.P [coaut.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Montevideo (Uruguay) CIMMYT : 2000ISBN: 9974-7586-1-0.Subject(s): Biotechnology | DNA | Molecular genetics | Selection | Triticum | CIMMYT | Plant breeding AGROVOCSummary: Molecular markers have many applications to crop improvement. When tightly linked to genes of interest, they can be used to indirectly select for the desirable alleles. In addition, molecular markers can be used for dissecting polygenic traits into their Mendelian components or quantitative trait loci (QTL), thus increasing our understanding of the inheritance of such traits. Scientists in the Applied Biotechnology Center at CIMMYT have been collaborating with the wheat program in the development and use of molecular markers for wheat improvement. Development of cultivars with durable leaf rust and yellow rust resistance is an important breeding objective of CIMMYT Resistance to leaf and yellow rust is controlled by a number of minor genes and is referred to as adult plant resistance (APR). Linkage mapping and bulked segregant analysis are being used with several recombinant inbred line populations segregating for leaf rust and yellow rust resistance in order to find molecular markers associated with APR genes. hree markers with significant association with durable leaf rust resistance have been found in one population. In a second population, five and two quantitative trait loci (QTL) were detected for resistance to leaf and yellow rust, respectively. In addition, molecular markers are being used to transfer Thinopyrum intermedium derived resistance to barley yellow dwarf virus into different bread wheats. Markers are also being used to detect wide cross derivatives with enhanced meiotic pairing that would facilitate the detection of introgression of chromosomal segments from wild relatives of wheat that carry important biotic and abiotic attributes into cultivated wheat.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-2884 (Browse shelf) 1 Available 649449
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Molecular markers have many applications to crop improvement. When tightly linked to genes of interest, they can be used to indirectly select for the desirable alleles. In addition, molecular markers can be used for dissecting polygenic traits into their Mendelian components or quantitative trait loci (QTL), thus increasing our understanding of the inheritance of such traits. Scientists in the Applied Biotechnology Center at CIMMYT have been collaborating with the wheat program in the development and use of molecular markers for wheat improvement. Development of cultivars with durable leaf rust and yellow rust resistance is an important breeding objective of CIMMYT Resistance to leaf and yellow rust is controlled by a number of minor genes and is referred to as adult plant resistance (APR). Linkage mapping and bulked segregant analysis are being used with several recombinant inbred line populations segregating for leaf rust and yellow rust resistance in order to find molecular markers associated with APR genes. hree markers with significant association with durable leaf rust resistance have been found in one population. In a second population, five and two quantitative trait loci (QTL) were detected for resistance to leaf and yellow rust, respectively. In addition, molecular markers are being used to transfer Thinopyrum intermedium derived resistance to barley yellow dwarf virus into different bread wheats. Markers are also being used to detect wide cross derivatives with enhanced meiotic pairing that would facilitate the detection of introgression of chromosomal segments from wild relatives of wheat that carry important biotic and abiotic attributes into cultivated wheat.

Global Wheat Program

English

R99-00CIMPU|0011|EE|AL-Wheat Program|AGRIS 0102|3

Jose Juan Caballero

INT0610

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.
Lunes –Viernes 9:00 am. 17:00 pm. Si tiene cualquier pregunta, contáctenos a CIMMYT-Knowledge-Center@cgiar.org