Abstract
Kernel shape and β-glucan content are important attributes for oat (Avena sativa L.) millers. The identification of genomic regions controlling these traits, as well as their effect on phenotype, will enable rapid gain from selection. The objectives of this study were (a) to identify the genomic regions associated with kernel shape in an oat panel adapted to subtropical environments and (b) to clarify the relationship between kernel shape and β-glucan content in oat. An elite oat panel comprising 406 inbred lines was assessed in Londrina and Eldorado do Sul, Southern Brazil. Genome-wide association analyses were performed for each environment separately and also in a multi-environment analysis. Phenotypic and genetic correlation coefficients were estimated between kernel shape traits and β-glucan content. Genomic regions influencing kernel length were identified on Mrg06, Mrg21, and Mrg24. Kernel width and kernel thickness were genetically correlated and shared a quantitative trait locus, located on Mrg13 of the oat consensus map. Phenotypic and genetic correlations were found between kernel shape traits and β-glucan content, indicating a negative relationship between kernel width or kernel thickness and β-glucan content. Oat breeding programs that aim to maintain minimum levels of β-glucan for nutrition and minimum kernel widths for milling will need to screen for both traits; otherwise, indirect selection will lead to unfavorable results. However, the negative correlation was not too strong (–0.4), suggesting that improvement for both traits can be made simultaneously.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 3986-3999 |
| Number of pages | 14 |
| Journal | Crop Science |
| Volume | 61 |
| Issue number | 6 |
| DOIs | |
| State | Published - Nov 1 2021 |
Bibliographical note
Funding Information:This study was supported by the Coordination for the Improvement of Higher Education Personnel (CAPES), the National Council for Scientific and Technological Development (CNPq), and Rio Grande do Sul State Research Support Foundation (PRONEX/FAPERGS; grant number 16/0484‐6). The first author was the recipient of CNPq (process number 140273/2016‐6) and CAPES (process number 88881.187633/2018‐01) PhD fellowships. The authors are thankful to the PepsiCo Agro Raw Material Discovery Laboratory – University of Minnesota for supporting the genotyping‐by‐sequencing. The views expressed in this article are those of the authors and do not necessarily reflect the position or policy of PepsiCo, Inc.
Funding Information:
This study was supported by the Coordination for the Improvement of Higher Education Personnel (CAPES), the National Council for Scientific and Technological Development (CNPq), and Rio Grande do Sul State Research Support Foundation (PRONEX/FAPERGS; grant number 16/0484-6). The first author was the recipient of CNPq (process number 140273/2016-6) and CAPES (process number 88881.187633/2018-01) PhD fellowships. The authors are thankful to the PepsiCo Agro Raw Material Discovery Laboratory – University of Minnesota for supporting the genotyping-by-sequencing. The views expressed in this article are those of the authors and do not necessarily reflect the position or policy of PepsiCo, Inc. Cristiano M. Zimmer: conceptualization, data curation, formal analysis, investigation, methodology, writing—original draft, writing—review and editing. Ian G. McNish: conceptualization, investigation, methodology, writing—review and editing. Kathy Esvelt Klos: conceptualization, investigation, methodology, writing—review and editing. David P. Eickholt: conceptualization, investigation, methodology, writing—review and editing. Klever M. A. Arruda: conceptualization, investigation, methodology, writing—review and editing. Marcelo T. Pacheco: conceptualization, investigation, methodology, writing—review and editing. Kevin P. Smith: conceptualization, investigation, methodology, supervision, writing—review and editing. Luiz C. Federizzi: conceptualization, funding acquisition, investigation, methodology, project administration, supervision, writing—review and editing. The authors declare that there is no conflict of interest.
Publisher Copyright:
© 2021 The Authors. Crop Science © 2021 Crop Science Society of America