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Progress in breeding for resistance to Ug99 and other races of the stem rust fungus in CIMMYT wheat germplasm

Frontiers of Agricultural Science and Engineering 2019年第3期6卷 210-224页

作者： Sridhar BHAVANI David PHODSON Julio HUERTA-ESPINO mandeep srandhawa Ravi PSINGH International Maize and Wheat Improvement Center Texcoco56237Mexico Campo Experimental Valle de México INIFAP Chapingo56230Mexico International Maize and Wheat Improvement Center ICRAF CampusNairobi00100Kenya

Races belonging to the Ug99(TTKSK) lineage of the wheat stem rust fungus, carrying complex virulence combinations, and their migration to countries in Africa,Middle East and Asia continue to pose a significant threat to global wheat *** rapid spread of additional races, e.g., TKTTF or the Digalu lineage, in several countries causing localized epidemics reminds us of the vulnerability of wheat germplasm to stem rust disease, a formidable foe referenced as early as biblical times.A global rust monitoring system reflecting increased surveillance efforts has identified 13 races within the Ug99 lineage in 13 countries and unrelated lineages are emerging, spreading and posing serious threats to wheat *** TKTTF has caused localized epidemics in Ethiopia and its variants have been recently implicated in stem rust outbreaks in *** research efforts have resulted in the identification of several new resistance genes and gene combinations for use in *** multiple adult plant resistance(APR) genes in high-yielding backgrounds and discovery of new quantitative trait loci conferring stem rust resistance has progressed in the recent years, enhancing the durability of *** gene stewardship and new generation breeding materials and cultivars that combine multiple race-specific or minor to intermediate effect APR genes,complemented by active surveillance and monitoring, have helped to limit major epidemics and increase grain yield potential in key target environments.

关键词： adult plant resistance black rust race-specific resistance Triticum aestivum

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