Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Master → Etats Unis → 2012 → Quantitative trait locus mapping of yield and yield components in canola (Brassica napus L.) under irrigated and rainfed treatments

Colorado State University (2012)

Quantitative trait locus mapping of yield and yield components in canola (Brassica napus L.) under irrigated and rainfed treatments

Heiliger, Annie

Titre : Quantitative trait locus mapping of yield and yield components in canola (Brassica napus L.) under irrigated and rainfed treatments

Auteur : Heiliger, Annie

Université de soutenance : Colorado State University

Grade : Master of Science 2012

Résumé partiel
Rapeseed (Brassica napus L.) is an oilseed crop that has a variety of uses, including applications in industry as well as for food, feed, and fuel. Improved B. napus cultivars with decreased levels of two disease-causing compounds are known commonly as canola or doublelow cultivars, and are approved for human and animal consumption in the U.S., Canada, and Europe. Canola is currently grown in the northern U.S. and in several areas of Canada and Europe, but has potential to be grown in other areas of the U.S., including Colorado, either for biodiesel or to be sold in a canola commodity food oil market at the discretion of the seed producer. Additionally, the cake meal left after oil extraction has a high protein concentration and can be added as a supplement to animal feed. In recent years, water availability for crop production in the western U.S. has declined due to competition with non-agricultural water uses, and the increasing demands for water will likely increase with global climate change. Therefore, in order to be sustainable, crops grown in Colorado must be high-yielding with limited or no irrigation inputs, and consequently canola cultivars adapted to the semi-arid climate of Colorado and the U.S. High Plains will need to be drought tolerant. To provide information relevant to improving adaptation of canola to Colorado conditions, a study was conducted with the following objectives : 1) to evaluate yield, yield components, and days to flowering (DTF) in two doubled haploid (DH) canola mapping populations under rainfed and irrigated conditions ; 2) to determine relationships among yield and yield components by analyzing trait correlations and to study trait inheritance patterns ; 3) to determine areas of the B. napus genome that are implicated in yield and yield component traits under both rainfed and irrigated conditions by quantitative trait locus (QTL) analysis ; and 4) to study the sensitivity of yield and yield component traits to drought stress by performing analysis of variance and by performing a QTL analysis on the difference in trait values from the rainfed and irrigated treatments.

Mots clés : Agriculture ; Agronomy|Biology ; Genetics|Agriculture ; Plant Culture

Présentation (PQDT)

Version intégrale

Page publiée le 16 juin 2013, mise à jour le 30 mars 2019