Utilisation of Aegilops (goatgrass) species to widen the genetic diversity of cultivated wheat

Wild Aegilops species related to cultivated wheat ( Triticum spp.) possess numerous genes of agronomic interest and can be valuable sources of resistance to diseases, pests and extreme environmental factors. These genes can be incorporated into the wheat genome via intergeneric crossing, following,...

Celý popis

Uloženo v:

Podrobná bibliografie
Vydáno v:	Euphytica Ročník 163; číslo 1; s. 1 - 19
Hlavní autoři:	Schneider, Annamária, Molnár, István, Molnár-Láng, Márta
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	Dordrecht Springer Netherlands 01.09.2008 Springer Springer Nature B.V
Témata:	Aegilops agronomic traits Agronomy. Soil science and plant productions Airborne microorganisms Biodiversity Biological and medical sciences Biomedical and Life Sciences Biotechnology Caudata Cereals Chromosome translocations Cultivation Cysts Diploids disease resistance Environmental factors Fundamental and applied biological sciences. Psychology Generalities. Genetics. Plant material Genes Genetic diversity Genetic engineering genetic improvement genetic markers Genetic resources Genetic resources, diversity Genetics Genetics and breeding of economic plants Genomes Grain cultivation Hybrids intergeneric hybridization Interspecific and intergeneric hybridization, introgressions Leaf rust Life Sciences Nematoda pest resistance Pests Plant breeding Plant breeding: fundamental aspects and methodology Plant Genetics and Genomics Plant material Plant Pathology Plant Physiology Plant Sciences Polyploidy Powdery mildew Review root knot Stem rust Stripe rust Studies substitution lines translocation lines Triticum Triticum aestivum Wheat Translocation lines Molecular markers Intergeneric hybrids Substitution lines Addition lines Wheat Monocotyledones Addition line Intergeneric hybrids- Addition lines, Substitution lines, Translocation lines Intergeneric hybridization Translocation line Genetic diversity Molecular marker Substitution line Triticum Aegilops Gramineae Angiospermae Genetic improvement Herbaceous plant Spermatophyta
ISSN:	0014-2336, 1573-5060
On-line přístup:	Získat plný text
Tagy:	Přidat tag Žádné tagy, Buďte první, kdo vytvoří štítek k tomuto záznamu!

Popis
Shrnutí:	Wild Aegilops species related to cultivated wheat ( Triticum spp.) possess numerous genes of agronomic interest and can be valuable sources of resistance to diseases, pests and extreme environmental factors. These genes can be incorporated into the wheat genome via intergeneric crossing, following, where necessary, the development of chromosome addition and substitution lines from the resulting hybrids. The transfer of a single segment from an alien chromosome can be achieved by translocations. The Aegilops (goatgrass) species, which are the most closely related to wheat, exhibit great genetic diversity, the exploitation of which has been the subject of experimentation for more than a century. The present paper gives a survey of the results achieved to date in the field of wheat– Aegilops hybridisation and gene transfer. The Aegilops genus consists of 11 diploid, 10 tetraploid and 2 hexaploid species. Of these 23 Aegilops species, most of the diploids ( Ae. umbellulata Zhuk., Ae. mutica Boiss., Ae. bicornis (Forssk.) Jaub. & Spach, Ae. searsii Feldman & Kislev ex Hammer, Ae. caudata L., Ae. sharonensis Eig, Ae. speltoides Tausch, Ae. longissima Schweinf. & Muschl.) and several polyploids ( Ae. ventricosa Tausch, Ae. peregrina (Hack. In J. Fraser) Marie & Weiller, Ae. geniculata Roth, Ae. kotschyi Boiss., Ae. biuncialis L.) have been used to develop wheat– Aegilops addition lines. Wheat– Aegilops substitution lines were developed using several species, including Ae. umbellulata , Ae. caudata , Ae. tauschii , Ae. speltoides , Ae. sharonensis , Ae. longissima and Ae. geniculata . Translocations carrying genes responsible for useful agronomic traits were developed with Ae. umbellulata , Ae. comosa , Ae. ventricosa , Ae. longissima , Ae. speltoides and Ae. geniculata . A large number of genes were transferred from Aegilops species to cultivated wheat, including those for resistance to leaf rust, stem rust, yellow rust and powdery mildew, and various pests (cereal cyst nematode, root knot nematode, Hessian fly, greenbug). Many molecular markers are linked to these resistance genes. The development of new molecular markers is also underway. There are still many untapped genetic resources in Aegilops species that could be used as resistance sources for plant breeding.
Bibliografie:	SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 14 ObjectType-Article-2 content type line 23 ObjectType-Article-1 ObjectType-Feature-2
ISSN:	0014-2336 1573-5060
DOI:	10.1007/s10681-007-9624-y