The final, formatted version of the article will be published soon.
ORIGINAL RESEARCH article
Front. Plant Sci.
Sec. Plant Development and EvoDevo
Volume 15 - 2024 |
doi: 10.3389/fpls.2024.1370956
This article is part of the Research Topic Crop Domestication and Selection: An Evolutionary View Affecting the Development of Agronomic Traits View all 7 articles
Redefining awn development in rice through the breeding history of Japanese awn reduction
Provisionally accepted- 1 Fukushima University, Fukushima, Fukushima, Japan
- 2 Hyogo Prefectural Research Center for Agriculture, Hyogo, Japan
- 3 Nagoya University, Nagoya, Aichi, Japan
- 4 Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, Japan
The study challenges the conventional understanding of awn loss as a domestication syndrome, showing instead that many awned varieties continued to be widely grown in Japan until the early 20th century, and that selection for awn reduction was active at that time, demonstrating that awn loss is not a domestication syndrome but "a trait that emerged during crop improvement". Although selection for awnless mutants was carried out independently using different types of awned cultivars in the early 20th century in Japan, awn loss was caused by the mutation in OsEPFL1. This suggests that a single mutant haplotype of OsEPFL1 was conserved in the genomes of different cultivars and subsequently selected within each line to meet the demand for awnless varieties. The study also conducts phylogenetic analyses of EPFL1 in 48 grass plants, revealing its unique involvement in awn formation in rice, while potentially playing a different role in the domestication of other grass plants. Finally, an attempt is made to isolate an awn-forming gene that have not been identified from the awned rice cultivar “Omachi”, which is still cultivated in Japan. The results presented in this paper provide a new perspective on domestication against the conventional understanding of awn development, shedding light on its potential as a useful organ for breeding to mitigate environmental stress.
Keywords: An-1, Awn, Breeding history, cold resistance, Domestication, EPFL1, GWAS, rice
Received: 15 Jan 2024; Accepted: 08 Apr 2024.
Copyright: © 2024 Suganami, Yoshida, Yoshida, Kawamura, Koketsu, Matsuoka and Kojima. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Shinya Yoshida, Hyogo Prefectural Research Center for Agriculture, Hyogo, Japan
Mayuko Kawamura, Nagoya University, Nagoya, 464-8601, Aichi, Japan
Eriko Koketsu, Nagoya University, Nagoya, 464-8601, Aichi, Japan
Makoto Matsuoka, Fukushima University, Fukushima, 960-1296, Fukushima, Japan
Soichi Kojima, Graduate School of Agricultural Science, Tohoku University, Sendai, 981-8555, Miyagi, Japan
Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.