Reciprocal Recurrent Genomic Selection Is Impacted by Genotype-by-Environment Interactions

Frontiers in Plant Science

Niklas Hartwig¹  Johannes Schacht¹  Philipp H. G. Boeven²  Erhard Ebmeyer³  Mario Gils³  Viktor Korzun⁴  Patrick Thorwarth⁴  C. Friedrich H. Longin⁴  Maximilian Rembe⁵  Jochen Christoph Reif⁵  Norman Philipp⁶  Ebrahim Kazman⁶  Pierrick Varenne⁶  Yusheng Zhao⁷  Nina Pfeiffer⁸  Sonja Kollers⁸ 

[1] Co. KGaA, Einbeck, Germany;Federal State Budgetary Institution of Science Federal Research Center “Kazan Scientific Center of Russian Academy of Sciences”, Kazan, Russia;KWS LOCHOW GmbH, Bergen, Germany;;KWS SAAT SE &Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Seeland, Germany;Limagrain Europe, Ferme de l'Etang – BP3−77390, Verneuil-l'Ètang, France;State Plant Breeding Institute, University of Hohenheim, Stuttgart, Germany;Syngenta Seeds GmbH, Hadmersleben, Germany;

关键词: grain yield;    hybrid breeding;    long-term selection gain;    genotype-times-year interaction;    abiotic stress;   

DOI  :  10.3389/fpls.2021.703419

来源: DOAJ

【 摘 要 】

Reciprocal recurrent genomic selection is a breeding strategy aimed at improving the hybrid performance of two base populations. It promises to significantly advance hybrid breeding in wheat. Against this backdrop, the main objective of this study was to empirically investigate the potential and limitations of reciprocal recurrent genomic selection. Genome-wide predictive equations were developed using genomic and phenotypic data from a comprehensive population of 1,604 single crosses between 120 female and 15 male wheat lines. Twenty superior female lines were selected for initiation of the reciprocal recurrent genomic selection program. Focusing on the female pool, one cycle was performed with genomic selection steps at the F2 (60 out of 629 plants) and the F5 stage (49 out of 382 plants). Selection gain for grain yield was evaluated at six locations. Analyses of the phenotypic data showed pronounced genotype-by-environment interactions with two environments that formed an outgroup compared to the environments used for the genome-wide prediction equations. Removing these two environments for further analysis resulted in a selection gain of 1.0 dt ha−1 compared to the hybrids of the original 20 parental lines. This underscores the potential of reciprocal recurrent genomic selection to promote hybrid wheat breeding, but also highlights the need to develop robust genome-wide predictive equations.

【 授权许可】

Unknown