Genetic analysis of wheat root seedlings in a NAM population

Abstract : Wheat is a major culture and food resource around the world. However, drought considerably reduces yield in major regions, such as in Northern Australia. Wheat breeding by improving root traits could lead to significant yield improvements for drought-prone environments. Thereby, a genetic analysis was realized using a NAM population designed to assist breeding for better drought tolerance in South-Eastern Queensland. Various seedling root traits were phenotyped using an aeroponic platform in two experiments in Belgium in 2016. In total, we found 98 QTLs for 14 root traits. Among the traits studied, three were of major interest for the breeding of new varieties in South-Eastern Queensland, where crops heavily rely on deep soil water storage in terminal drought: the maximum root length, the number of seminal roots and the number of deep lateral roots. Considering the previous QTL studies, it is likely that one of the QTLs identified on chromosome 1D for the number of seminal roots is a new QTL. QTLs with interesting effects were identified and could potentially assist breeders improve drought tolerance in the region.
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Master Thesis
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Alice Royer. Genetic analysis of wheat root seedlings in a NAM population. Life Sciences [q-bio]. 2018. ⟨dumas-01972359⟩

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