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Identification and mapping of genetic factors controlling stripe rust and leaf rust resistance in spring wheat

By: Singh, A.
Contributor(s): Campbell, H [coaut.] | Cuthbert, R.D [coaut.] | DePauw, R.M [coaut.] | Knox, R.E [coaut.] | Shorter, S [coaut.] | Singh, A.K [coaut.] | Bhavani, S [coaut.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: 2013Description: p. 12.Summary: Stripe rust is rapidly becoming a major threat to wheat production in Canada due to its ability to evolve into new races and adapt to higher temperatures. Leaf rust contributes to major production losses. The objectives of this research were to identify and map QTL for stripe rust and leaf rust resistances in a doubled haploid (DH) population derived from the Canadian wheat cultivars AC Cadillac and Carberry. The DH population was developed and genotyped with DArT® (578) and SSR (56) markers. The parents and DH population was phenotyped for stripe rust severity and response to prevalent races in field rust nurseries in Kenya (Njoro), Canada (Swift Current), and New Zealand (Christchurch); and for leaf rust severity and response in field nurseries in Canada (Swift Current) in two environments. QTL analysis revealed AC Cadillac as a source of stripe rust resistance on chromosomes 2A, 2B, 2D, 3A, 3B, 5B and 7B, and Carberry as a source of resistance on chromosomes 2B, 4B, 5B and 7A. For leaf rust, AC Cadillac contributed QTL on chromosome 2A and Carberry contributed QTL on chromosomes 2B and 4B. Based on phenotypic variance (PV) explained both major and minor effect stripe rust and leaf rust QTL were identified. This population will provide useful sources of resistance to stripe rust and leaf rust, and will assist in breeding for resistance to these diseases.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-7284 (Browse shelf) Available
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Abstract only

Stripe rust is rapidly becoming a major threat to wheat production in Canada due to its ability to evolve into new races and adapt to higher temperatures. Leaf rust contributes to major production losses. The objectives of this research were to identify and map QTL for stripe rust and leaf rust resistances in a doubled haploid (DH) population derived from the Canadian wheat cultivars AC Cadillac and Carberry. The DH population was developed and genotyped with DArT® (578) and SSR (56) markers. The parents and DH population was phenotyped for stripe rust severity and response to prevalent races in field rust nurseries in Kenya (Njoro), Canada (Swift Current), and New Zealand (Christchurch); and for leaf rust severity and response in field nurseries in Canada (Swift Current) in two environments. QTL analysis revealed AC Cadillac as a source of stripe rust resistance on chromosomes 2A, 2B, 2D, 3A, 3B, 5B and 7B, and Carberry as a source of resistance on chromosomes 2B, 4B, 5B and 7A. For leaf rust, AC Cadillac contributed QTL on chromosome 2A and Carberry contributed QTL on chromosomes 2B and 4B. Based on phenotypic variance (PV) explained both major and minor effect stripe rust and leaf rust QTL were identified. This population will provide useful sources of resistance to stripe rust and leaf rust, and will assist in breeding for resistance to these diseases.

Global Wheat Program

English

Lucia Segura

INT2843

CIMMYT Staff Publications Collection

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