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CC BY V4.0, Open Access
Thesis
EVALUATION OF PREHARVEST SPROUTING IN A DIVERSE PANEL OF QUINOA (Chenopodium Quinoa Willd.)
Washington State University
Master of Science (MS), Washington State University
01/2022
DOI:
https://doi.org/10.7273/000004574
Handle:
https://hdl.handle.net/2376/125334
Abstract
The introduction of quinoa to new growing regions and environments is of interest to farmers, consumers, and stakeholders around the world. Many plant breeding programs have already
started to adapt quinoa to the environmental and agronomic conditions of their local fields. In the
Pacific Northwest of the USA, these breeding efforts started in 2010, but factors like preharvest
sprouting, waterlogging, and biotic stresses haltered quinoa production at commercial scale.
Preharvest sprouting (PHS) is undesirable sprouting of seeds that occurs before harvest and is
triggered by rain or humid conditions. PHS is responsible for yield losses and lower nutrition in
cereal grains. PHS has been extensively studied in wheat, barley, and rice, but there are limited
reports for quinoa. This study aimed to better understand PHS in quinoa through assessment of
the trait in a diversity panel (N=336). A scoring scale specific for panicles was developed to
quantify sprouting and the resulting phenotypes were used to create a PHS-tolerance ranking and
to perform GWAS analysis. Our findings indicate that PHS occurs at varying degrees across the
quinoa germplasm and that it is possible to access PHS-tolerance from natural sources.
Ultimately, these genotypes will be used as parental lines in future breeding programs aiming to
incorporate tolerance to PHS.
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Details
- Title
- EVALUATION OF PREHARVEST SPROUTING IN A DIVERSE PANEL OF QUINOA (Chenopodium Quinoa Willd.)
- Creators
- Cristina Dominique Ocana Gallegos
- Contributors
- Kevin K Murphy (Advisor)Amber A Hauvermale (Committee Member)Zhiwu Z Zhang (Committee Member)
- Awarding Institution
- Washington State University
- Academic Unit
- Agricultural, Human, and Natural Resource Sciences, College of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University
- Number of pages
- 217
- Identifiers
- OCLC#: 1371070409; 99900898739401842
- Language
- English
- Resource Type
- Thesis