<i>Lr46</i>: A Gene Conferring Slow-Rusting Resistance to Leaf Rust in Wheat

Singh, Ravi P.; Mujeeb‐Kazi, A.; Espino, Julio Huerta

doi:10.1094/phyto.1998.88.9.890

Cited by 261 publications

(187 citation statements)

References 17 publications

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“…The combination of Lr35 with seedling and/or other adultplant leaf rust resistance genes should facilitate more efficient breeding for durable resistance [155]. Genes Lr34, Lr46 and Lr67 provide partial or slow resistance to leaf rust and are considered more durable than seedling resistance genes [173]. The mode of action of these genes is characterized by a longer latent period, lower infection frequency, smaller uredinia size, shorter period of sporulation and lower spore density [46].…”

Section: Durable Resistance Breeding For the Development Of Rust-resimentioning

confidence: 99%

Genetic analysis of rust resistance genes in global wheat cultivars: an overview

Aktar-Uz-Zaman

Tuhina-Khatun

Hanafi

et al. 2017

Biotechnology & Biotechnological Equipment

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Rust is the most devastating fungal disease in wheat. Three rust diseases, namely, leaf or brown rust caused by Puccinia triticina Eriks, stem or black rust caused by Puccinia graminis f. sp. tritici West, and stripe or yellow rust caused by Puccinia striiformis f. Tritici Eriks, are the most economically significant and common diseases among global wheat cultivars. Growing cultivars resistant to rust is the most sustainable, cost-effective and environmentally friendly approach for controlling rust diseases. To date, more than 187 rust resistance genes (80 leaf rust, 58 stem rust and 49 stripe rust) have been derived from diverse wheat or durum wheat cultivars and the related wild species using different molecular methods. This review provides a detailed discussion of the different aspects of rust resistance genes, their primitive sources, their distribution in global wheat cultivars and the importance of durable resistant varieties for controlling rust diseases. This information will serve as a foundation for plant breeders and geneticists to develop durable rust-resistant wheat varieties through marker-assisted breeding or gene pyramiding.

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Section: Durable Resistance Breeding For the Development Of Rust-resimentioning

confidence: 99%

Genetic analysis of rust resistance genes in global wheat cultivars: an overview

Aktar-Uz-Zaman

Tuhina-Khatun

Hanafi

et al. 2017

Biotechnology & Biotechnological Equipment

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“…Lr34 has a resistance phenotype of smaller and fewer uredinia compared to a susceptible genotype and codes for an ABC drug resistant transporter protein [36]. Other leaf rust resistance genes Lr46, Lr67, and Lr68 also confer adult plant-partial resistance [37][38][39], however these genes have not yet been cloned and sequenced. Due to the highly variable nature of P. triticina, durable leaf rust resistance in wheat cultivars has been difficult to achieve.…”

Section: Leaf Rust Resistance In Wheatmentioning

confidence: 99%

Leaf Rust of Wheat: Pathogen Biology, Variation and Host Resistance

Kolmer

2013

Forests

120

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Abstract:Rusts are important pathogens of angiosperms and gymnosperms including cereal crops and forest trees. With respect to cereals, rust fungi are among the most important pathogens.Cereal rusts are heteroecious and macrocyclic requiring two taxonomically unrelated hosts to complete a five spore stage life cycle. Cereal rust fungi are highly variable for virulence and molecular polymorphism. Leaf rust, caused by Puccinia triticina is the most common rust of wheat on a worldwide basis. Many different races of P. triticina that vary for virulence to leaf rust resistance genes in wheat differential lines are found annually in the US. Molecular markers have been used to characterize rust populations in the US and worldwide. Highly virulent races of P. triticina are selected by leaf rust resistance genes in the soft red winter wheat, hard red winter wheat and hard red spring wheat cultivars that are grown in different regions of the US. Cultivars that only have race-specific leaf rust resistance genes that are effective in seedling plants lose their effective resistance and become susceptible within a few years of release. Cultivars with combinations of race non-specific resistance genes have remained resistant over a period of years even though races of the leaf rust population have changed constantly.

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“…A slow rusting gene identified in the cultivar Pavon and was found located on chromosome 1B by crossing with a monosomic series of adult plant leaf rust susceptible cultivar Lal Bahadur [52]. This is the 2nd named minor gene involved in slow rusting.…”

Section: Lr46/yr29mentioning

confidence: 99%

Status and strategies in breeding for rust resistance in wheat

Khan¹,

Bukhari²,

Dar³

et al. 2013

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Wheat along with rice and maize is fulfilling half of the calories demands of the world. Global Wheat production has increased tremendously since green revolution in 1960's and helped in minimizing hunger and malnutrition. Developing countries, which consume 60% of the global wheat production, have shown a higher yield increase than the developed countries in the past [1]. It was driven by the hunger prevalence in these countries and was attributable to the introduction of high yielding and rusted resistant semi dwarf varieties developed under the collaborative efforts of International and National research systems during the last 50 years. Whereas, climate change and the emergence of new pests and diseases are threatening the food sustainability. The evolution of new races of disease pathogens like stem rust (Ug 99) is of serious concern. In order to feed the ever increasing population we have to increase wheat production at the rate 1.6% which can be achieved by developing high yielding varieties having a good tolerance level for biotic and abiotic stresses.

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Lr46: A Gene Conferring Slow-Rusting Resistance to Leaf Rust in Wheat

Cited by 261 publications

References 17 publications

Genetic analysis of rust resistance genes in global wheat cultivars: an overview

Genetic analysis of rust resistance genes in global wheat cultivars: an overview

Leaf Rust of Wheat: Pathogen Biology, Variation and Host Resistance

Status and strategies in breeding for rust resistance in wheat

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