Leaf rust and stripe rust resistance genes Lr54 and Yr37 transferred to wheat from Aegilops kotschyi

The tendency of unpaired meiotic chromosomes to undergo centric misdivision was exploited to translocate leaf rust and stripe rust resistance genes from an Aegilops kotschyi addition chromosome to a group 2 chromosome of wheat. Monosomic and telosomic analyses showed that the translocation occurred...

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Veröffentlicht in:Plant breeding Jg. 124; H. 6; S. 538 - 541
Hauptverfasser: Marais, G. F., McCallum, B., Snyman, J. E., Pretorius, Z. A., Marais, A. S.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Berlin, Germany Blackwell Verlag GmbH 01.12.2005
Blackwell
Schlagworte:
Aegilops
Aegilops kotschyi
Agronomy. Soil science and plant productions
Biological and medical sciences
chromosome addition
chromosome translocation
disease resistance
Fundamental and applied biological sciences. Psychology
genes
Genetics and breeding of economic plants
intergeneric hybridization
Interspecific and intergeneric hybridization, introgressions
introgression
leaves
Pest resistance
plant breeding
Plant breeding: fundamental aspects and methodology
Plant pathogens
Puccinia recondita
Puccinia striiformis
Puccinia striiformis f. sp. tritici
Puccinia triticina
rust diseases
translocation
Triticum aestivum
Varietal selection. Specialized plant breeding, plant breeding aims
wheat
wide hybridization
Puccinia striiformis
Translocation
Monocotyledones
Plant pathogen
Basidiomycetes
Puccinia triticina
Parasitic rust
Genetic determinism
Cereal crop
Fungus resistance
Fungi
Puccinia recondita
Aegilops
Gramineae
Angiospermae
Genetic improvement
Interspecific hybridization
Aegilops kotschyi
Herbaceous plant
Spermatophyta
Puccinia striiformis f. sp. tritici
Triticum aestivum
wide hybridization
Thallophyta
ISSN:0179-9541, 1439-0523
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Beschreibung
Zusammenfassung:The tendency of unpaired meiotic chromosomes to undergo centric misdivision was exploited to translocate leaf rust and stripe rust resistance genes from an Aegilops kotschyi addition chromosome to a group 2 chromosome of wheat. Monosomic and telosomic analyses showed that the translocation occurred to wheat chromosome arm 2DL. The introgressed region did not pair with the corresponding wheat 2DL telosome during meiosis suggesting that a whole arm may have been transferred. Female transmission of the resistance was about 55% whereas male transmission was strongly preferential (96%). The symbols Lr54 and Yr37 are proposed to designate the new resistance genes.
Bibliographie:ark:/67375/WNG-7914FDMH-B
ArticleID:PBR1116
istex:AE1C95F3A7BD6F88B03DD0A99D1408B0EFC89088
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0179-9541
1439-0523
DOI:10.1111/j.1439-0523.2005.01116.x