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RESEARCH ARTICLE
Contents Vol 76(6)

Adaptability evaluation and germplasm filtration of Aegilops tauschii in glasshouse on the Qinghai–Tibet Plateau

Fahui Ye A B C D # , Shuxiang Yin A B C D # , Meixi Song A B C D , Xia Li A B C D , Jicheng Shen A B C , Demei Liu A B C , Ruijuan Liu A B C , Huaigang Zhang A B C D , Yuhu Shen A B C * and Wenjie Chen https://orcid.org/0000-0003-0641-1815 A B C *
+ Author Affiliations
- Author Affiliations

A Qinghai Provincial Key Laboratory of Crop Molecular Breeding, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai 810008, China. Email:yefahui@nwipb.cas.cn, yinshuxiang@nwipb.cas.cn

B Laboratory for Research and Utilization of Qinghai Tibet Plateau Germplasm Resources, Xining, Qinghai 810008, China.

C Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai 810008, China.

D University of Chinese Academy of Sciences, Beijing 100049, China.

* Correspondence to: shenyuhu@nwipb.cas.cn, wjchen@nwipb.cas.cn

Handling Editor: Enrico Francia

Crop & Pasture Science 76, CP25056 https://doi.org/10.1071/CP25056
Submitted: 28 February 2025  Accepted: 14 May 2025  Published: 30 May 2025

© 2025 The Author(s) (or their employer(s)). Published by CSIRO Publishing

Abstract

Context

Aegilops tauschii is an important germplasm resource to improve common wheat, which is less used in Qinghai–Tibet Plateau.

Aim

To select Aegilops tauschii germplasm resource that might adapt to the climate of Qinghai–Tibet Plateau in the future and retain eminent agronomic traits.

Methods

Three experimental groups (JA, JB and JC), each with 177 accessions from around the world, were cultivated in a glasshouse in conditions that simulated the temperature and humidity of the growing season in Qinghai–Tibet Plateau, so that the harvest rate and important agronomic traits can be tested.

Key results

First, long-term low-temperature process was inconspicuous towards the accomplishment of its life cycle. In total, 36.72–42.37% of accessions can complete the life cycle and the accessions were fertile in all experimental groups. Second, low temperature and longer process time created positive effects on plant traits of Aegilops tauschii but negative effects on grain phenotypic traits. Third, humidity was a more important environmental factor than was temperature for the limitations of the plant traits and the improvement of grain phenotypic traits. Fourth, long-term low temperature and low temperature–high humidity conditions seemed to be more favorable for the expression of 1Dx5 + 1Dy10 subunits.

Conclusions

In total, 57 of the 177 accessions were selected that might be suitable for future cultivation of Aegilops tauschii germplasm resources on the Qinghai–Tibet Plateau, and 10 accessions had excellent agronomic traits.

Implications

These findings have laid groundwork for the breeding of Aegilops tauschii that has excellent agronomic traits and can be cultivated in Qinghai–Tibet Plateau.

Keywords: adaptability evaluation, Aegilops tauschii, germplasm filtration, glasshouse, humidity, identification of key agronomic traits, low-temperature treatment, Qinghai–Tibet Plateau.

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