Genotype by environment model predictive ability in miscanthus

Widener, Sarah J.

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https://hdl.handle.net/2142/120456 Copy

Description

Title

Genotype by environment model predictive ability in miscanthus

Author(s)

Widener, Sarah J.

Issue Date

2023-05-05

Director of Research (if dissertation) or Advisor (if thesis)

Lipka, Alexander E

Committee Member(s)

• Jarquin, Diego
• Sacks, Erik
• Rutkoski, Jessica
• Jamann, Tiffany M

Department of Study

Crop Sciences

Discipline

Crop Sciences

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

M.A.

Degree Level

Thesis

Keyword(s)

• Genotype by environment
• predictive ability
• MISCANTHUS
• Mia
• Msi
• M. sinensis
• M. sacchariflorus

Abstract

Miscanthus is a genus of perennial grasses native to East Asia that shows promise as a biofuel energy source. Breeding efforts for increasing biofuel capability in this genus have focused on two species, namely M. sinensis (Msi) and M. sacchariflorus (Msa). For these efforts to succeed, it is critical that both Msi and Msa, as well as their interspecific crosses, are grown at higher latitudes. Therefore, the purpose of this study was to investigate how well existing data from Msi and Msa trials grown at locations throughout the northern hemisphere can train state-of-the-art genomic selection (GS) models to predict genomic estimated breeding values (GEBVs) of dry yield for untested Msi and Msa accessions in untested environments. We found that accounting for genotype-by-environment interaction in the GS model did not notably improve predictive ability. Additionally, we observed that locations with lower latitudes showed higher predictive ability relative to locations with higher latitudes. These results suggest that it is crucial to increase trial locations at higher-latitude locations to investigate the source of this correlation. This will make it possible to train GS models using data from environments that are similar to growing conditions at the locations targeted by Msi and Msa breeders. Such an increase of trial locations in target environments could pave the way towards advancing breeding efforts for overwintering ability in Msi and Msa, and ultimately support the potential of Miscanthus as a biofuel crop.

Graduation Semester

2023-05

Type of Resource

Thesis

Handle URL

https://hdl.handle.net/2142/120456

Copyright and License Information

Copyright 2023 Sarah Widener

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