Uncovering Trait Associations Resulting in Maximal Seed Yield in Winter and Spring Oilseed Rape

A - Papers appearing in refereed journals

Siles-Suarez, L., Hassall, K. L., Sanchis-Gritsch, C., Eastmond, P. J. and Kurup, S. 2021. Uncovering Trait Associations Resulting in Maximal Seed Yield in Winter and Spring Oilseed Rape. Frontiers in Plant Science. 12 (6 September), p. 697576. https://doi.org/10.3389/fpls.2021.697576

AuthorsSiles-Suarez, L., Hassall, K. L., Sanchis-Gritsch, C., Eastmond, P. J. and Kurup, S.
Abstract

Seed yield is a complex trait for many crop species including oilseed rape (OSR) (Brassica napus), the second most important oilseed crop worldwide. Studies have focused on the contribution of distinct factors in seed yield such as environmental cues, agronomical practices, growth conditions, or specific phenotypic traits at the whole plant level, such as number of pods in a plant. However, how female reproductive traits contribute to whole plant level traits, and hence to seed yield, has been largely ignored. Here, we describe the combined contribution of 33 phenotypic traits within a B. napus diversity set population and their trade-offs at the whole plant and organ level, along with their interaction with plant level traits. Our results revealed that both Winter OSR (WOSR) and Spring OSR (SOSR); the two more economically important OSR groups in terms of oil production; share a common dominant reproductive strategy for seed yield. In this strategy, the main inflorescence is the principal source of seed yield, producing a good number of ovules, a large number of long pods with a concomitantly high number of seeds per pod. Moreover, we observed that WOSR opted for additional reproductive strategies than SOSR, presenting more plasticity to maximise seed yield. Overall, we conclude that OSR adopts a key strategy to ensure maximal seed yield and propose an ideal ideotype highlighting crucial phenotypic traits that could be potential targets for breeding.

KeywordsBrassica napus; Oilseed rape; High temperature stress; Selection criteria; Grain-yield; Components; Number; Improvement; Oleifera; Abortion; Pod
Year of Publication2021
JournalFrontiers in Plant Science
Journal citation12 (6 September), p. 697576
Digital Object Identifier (DOI)https://doi.org/10.3389/fpls.2021.697576
Open accessPublished as ‘gold’ (paid) open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeBrassica Rapeseed And Vegetable Optimisation (BRAVO)
TPM - Tailoring Plant Metabolism - Work package 1 (WP1) - High value lipids for health and industry
Publisher's version
Output statusPublished
Publication dates
Online06 Sep 2021
Publication process dates
Accepted11 Aug 2021
PublisherFrontiers Media SA
ISSN1664-462X

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