A comprehensive characterization of agronomic and end-use quality phenotypes across a quinoa world core collection

Frontiers in Plant Science

Plant Science

Sandra M. Schmöckel¹  Edgar P. Spalding²  Nathan D. Miller²  Kevin M. Murphy³  Alathea Davies³  Mark Tester⁴  Daniel Packer⁵  Evan B. Craine⁶ 

[1] Department Physiology of Yield Stability, Institute of Crop Science, Faculty of Agriculture, University of Hohenheim, Stuttgart, Germany;Department of Botany, University of Wisconsin-Madison, Madison, WI, United States;Department of Chemistry, University of Wyoming, Laramie, WY, United States;Division of Biological and Environmental Sciences and Engineering (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia;Sustainable Seed Systems Laboratory, Department of Crop and Soil Sciences, Washington State University, Pullman, WA, United States;The Land Institute, Salina, KS, United States;

关键词: quinoa;    plant breeding;    protein;    amino acids;    high-throughput phenotyping;   

DOI  :  10.3389/fpls.2023.1101547

 received in 2022-11-18, accepted in 2023-01-09,  发布年份 2023

来源: Frontiers

【 摘 要 】

Quinoa (Chenopodium quinoa Willd.), a pseudocereal with high protein quality originating from the Andean region of South America, has broad genetic variation and adaptability to diverse agroecological conditions, contributing to the potential to serve as a global keystone protein crop in a changing climate. However, the germplasm resources currently available to facilitate quinoa expansion worldwide are restricted to a small portion of quinoa’s total genetic diversity, in part because of day-length sensitivity and issues related to seed sovereignty. This study aimed to characterize phenotypic relationships and variation within a quinoa world core collection. The 360 accessions were planted in a randomized complete block design with four replicates in each of two greenhouses in Pullman, WA during the summer of 2018. Phenological stages, plant height, and inflorescence characteristics were recorded. Seed yield, composition, thousand seed weight, nutritional composition, shape, size, and color were measured using a high-throughput phenotyping pipeline. Considerable variation existed among the germplasm. Crude protein content ranged from 11.24% to 17.81% (fixed at 14% moisture). We found that protein content was negatively correlated with yield and positively correlated with total amino acid content and days to harvest. Mean essential amino acids values met adult daily requirements but not leucine and lysine infant requirements. Yield was positively correlated with thousand seed weight and seed area, and negatively correlated with ash content and days to harvest. The accessions clustered into four groups, with one-group representing useful accessions for long-day breeding programs. The results of this study establish a practical resource for plant breeders to leverage as they strategically develop germplasm in support of the global expansion of quinoa.

【 授权许可】

Unknown   
Copyright © 2023 Craine, Davies, Packer, Miller, Schmöckel, Spalding, Tester and Murphy