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Identifying variation for N-use efficiency and associated traits in amphidiploids derived from hybrids of bread wheat and the genera Aegilops, Secale, Thinopyrum and Triticum

Nehe, Ajit; King, Julie; King, Ian P.; Murchie, Erik H.; Foulkes, M. John

Identifying variation for N-use efficiency and associated traits in amphidiploids derived from hybrids of bread wheat and the genera Aegilops, Secale, Thinopyrum and Triticum Thumbnail


Authors

Ajit Nehe

Ian P. King

Dr ERIK MURCHIE erik.murchie@nottingham.ac.uk
Professor of Applied Plant Physiology



Contributors

Aimin Zhang
Editor

Abstract

Future genetic progress in wheat grain yield will depend on increasing biomass and this must be achieved without commensurate increases in nitrogen (N) fertilizer inputs to minimize environmental impacts. In recent decades there has been a loss of genetic diversity in wheat through plant breeding. However, new genetic diversity can be created by incorporating genes into bread wheat from wild wheat relatives. Our objectives were to investigate amphidiploids derived from hybrids of bread wheat (Triticum aestivum L.) and related species from the genera Aegilops, Secale, Thinopyrum and Triticum for expression of higher biomass, N-use efficiency (NUE) and leaf photosynthesis rate compared to their bread wheat parents under high and low N conditions. Eighteen amphidiploid lines and their bread wheat parents were examined in high N (HN) and low N (LN) treatments under glasshouse conditions in two years. Averaged across years, grain yield reduced by 38% under LN compared to HN conditions (P = 0.004). Three amphidiploid lines showed positive transgressive segregation compared to their bread wheat parent for biomass per plant under HN conditions. Positive transgressive segregation was also identified for flag-leaf photosynthesis both pre-anthesis and post-anthesis under HN and LN conditions. For N uptake per plant at maturity positive transgressive segregation was identified for one amphidiploid line under LN conditions. Our results indicated that introgressing traits from wild relatives into modern bread wheat germplasm offers scope to raise biomass and N-use effciency in both optimal and low N availability environments.

Journal Article Type Article
Acceptance Date Mar 29, 2022
Online Publication Date Apr 15, 2022
Publication Date Apr 1, 2022
Deposit Date May 13, 2022
Publicly Available Date May 13, 2022
Journal PLoS ONE
Electronic ISSN 1932-6203
Publisher Public Library of Science (PLoS)
Peer Reviewed Peer Reviewed
Volume 17
Issue 4 April
Article Number e0266924
DOI https://doi.org/10.1371/journal.pone.0266924
Public URL https://nottingham-repository.worktribe.com/output/7766920
Publisher URL https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0266924

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