The influence of strigolactone pathway genes on plant architecture

A study on the inheritance of horticultural traits in chrysanthemum

authored by: M. Klie, M. Linde, T. Debener
Abstract: Chrysanthemums (Chrysanthemum indicum hybrid) are one of the most important ornamental plants with a large variation for different phenotypic traits; however, there is only limited data about the inheritance of these traits or corresponding marker-trait aßociations. We phenotyped and genotyped two types of chrysanthemum populations with the main focus on shoot branching: a collection of 86 cultivars and a biparental F1-population of 160 individuals. We identified 15 marker-trait aßociations with AFLP markers for the genotype collection using a genome-wide aßociation study and 17 marker-trait aßociations for the population by applying a single locus analysis. Additionally, we started a candidate gene approach for strigolactone pathway genes to identify marker alleles that are significantly aßociated with shoot branching. First results indicate, that these genes describe a large proportion of the variation in shoot branching in these populations. This highlights the role of the strigolactone pathway and indicates that shoot branching in the chrysanthemum has a polygenic inheritance pattern, though other yet unknown factors are also likely involved. Although nearly all of the investigated traits were characterized by a continuous variation in phenotypic values, as was expected for the outcroßing hexasomic nature of the chrysanthemum, we identified informative marker-trait aßociations with important characteristics.
Organisation(s): Section Molecular Plant Breeding
External Organisation(s): KWS Saat SE & Co. KGaA
Type: Contribution to book/anthology
Pages: 171-178
No. of pages: 8
Publication date: 28.06.2015
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Horticulture
Electronic version(s): https://doi.org/10.17660/ActaHortic.2015.1087.20 (Access: Unknown)