QTLs for important breeding characteristics in the doubled haploid oat progeny

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Abstract:

A homozygous mapping population, consisting of doubled haploid (DH) oat (Avena sativa L.) plants generated through anther culture of F1 plants from the cross between the Finnish cultivar ‘Aslak’ and the Swedish cultivar ‘Matilda’, was used to construct an oat linkage map. Ten agronomic and quality traits were analyzed in the DH plants from field trials in 2005 and 2006. Leaf blotch (caused by Pyrenophora avenae) resistance was also evaluated in a greenhouse test with 2 different isolates. One to 8 quantitative trait loci (QTLs) were found to be associated with each trait studied. Some chromosomal regions affected more than 1 trait; for example, 4 regions affected both protein and oil content. This study gives valuable information to oat breeders concerning the inheritance of important traits, and it provides potential tools to assist breeding.

Une population de cartographie homozygote, composée de plantes haploïdes doublées (HD) produites par culture d’anthères à partir de plantes F1 issues du croisement entre le cultivar finlandais ‘Aslak’ et le cultivar suédois ‘Matilda’, a été employée pour produire une carte génétique de l’avoine. Dix caractères agronomiques et qualitatifs ont été analysés chez les plantes HD suite à des essais au champ réalisés en 2005 et 2006. La résistance à l’helminthosporiose (causée par le Pyrenophora avenae) a également été évaluée suite à des inoculations en serre à l’aide de deux isolats différents. Entre un et huit QTL étaient associés à chacun des caractères étudiés. Certaines régions chromosomiques affectaient plus d’un caractère. Par exemple, quatre régions influençaient à la fois la teneur en protéine et en huile. Cette étude apporte de précieuses informations aux sélectionneurs de l’avoine concernant l’hérédité de caractères importants et elle procure des outils potentiels pour assister la sélection.

Document Type: Research Article

Publication date: June 1, 2010

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  • From its inception in 1957, this international cytogenetics journal has catered to the research areas of the members of the Genetics Society of Canada; traditionally, these have included agriculture, entomology, genetics/cytogenetics, and evolutionary mechanisms. The contents of the journal have evolved as contributors developed new technologies and interests. A 20-member Editorial Board is composed of scientists from around the world. Reviews and commentary from respected experts are often featured.
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