The influence of strigolactone pathway genes on plant architecture

A study on the inheritance of horticultural traits in chrysanthemum

verfasst von

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.

Organisationseinheit(en)

Abteilung Molekulare Pflanzenzüchtung

Externe Organisation(en)

KWS Saat SE & Co. KGaA

Typ

Beitrag in Buch/Sammelwerk

Seiten

171-178

Anzahl der Seiten

8

Publikationsdatum

28.06.2015

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Gartenbau

Elektronische Version(en)

https://doi.org/10.17660/ActaHortic.2015.1087.20 (Zugang: Unbekannt)