Mapping dynamic QTL for plant height in triticale
- Equal contributors
1 State Plant Breeding Institute, University of Hohenheim, Stuttgart 70599, Germany
2 Crop Genetics and Breeding Department, China Agricultural University, Beijing 100193, China
3 Competence Centre of Applied Agricultural Engineering COALA, University of Applied Sciences Osnabrück, Osnabrück 49076, Germany
4 ARC Centre of Excellence for Plant Cell Walls, University of Adelaide, Waite Campus, Urrbrae, SA 5064, Australia
5 Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben 06466, Germany
6 Saatzucht Dr. Hege GbR Domäne Hohebuch, Waldenburg 74638, Germany
BMC Genetics 2014, 15:59 doi:10.1186/1471-2156-15-59Published: 19 May 2014
Plant height is a prime example of a dynamic trait that changes constantly throughout adult development. In this study we utilised a large triticale mapping population, comprising 647 doubled haploid lines derived from 4 families, to phenotype for plant height by a precision phenotyping platform at multiple time points.
Using multiple-line cross QTL mapping we identified main effect and epistatic QTL for plant height for each of the time points. Interestingly, some QTL were detected at all time points whereas others were specific to particular developmental stages. Furthermore, the contribution of the QTL to the genotypic variance of plant height also varied with time as exemplified by a major QTL identified on chromosome 6A.
Taken together, our results in the small grain cereal triticale reveal the importance of considering temporal genetic patterns in the regulation of complex traits such as plant height.