{"title":"Modulating soybean yield responses to climate warming: The role of E3 and E4 loci in growth period adaptation","authors":"Etsushi Kumagai, Satoshi Nakano, Naoki Matsuo, Tetsuya Yamada","doi":"10.1002/csc2.21314","DOIUrl":null,"url":null,"abstract":"Crop models have suggested high sensitivity of soybean [<jats:italic>Glycine max</jats:italic> (L.) Merr.] to day length and the resultant extension of the growth period as a concept to overcome yield loss due to climate warming. However, experimental validation of this concept is incomplete. The <jats:italic>E3</jats:italic> and <jats:italic>E4</jats:italic> loci encode phytochrome A isoforms and enhance sensitivity to day length. Our previous study showed that the dominant <jats:italic>E4</jats:italic> allele can mitigate yield loss due to warming. In this study, we similarly tested the hypothesis that the dominant <jats:italic>E3</jats:italic> allele can reduce yield loss caused by warming. One of the leading Japanese cultivars Enrei (<jats:italic>e3</jats:italic>/<jats:italic>E4</jats:italic>) and near‐isogenic lines (NIL‐<jats:italic>e3e4</jats:italic>, NIL‐<jats:italic>E3e4</jats:italic>, and NIL‐<jats:italic>E3E4</jats:italic>) in the Enrei genetic background were grown at near ambient temperature or either 2.0°C or 4.7°C above ambient temperature in temperature‐gradient chambers (TGCs) in a cool region in Japan. The number of days from sowing to beginning of flowering (R1) decreased with increasing temperature, regardless of genotype. However, increasing temperature extended the period from R1 to beginning of pod filling (R3) and increased pod number per plant and seed yield per plant in all genotypes except NIL‐<jats:italic>e3e4</jats:italic>. Combined data from the TGC experiment and from field trials across three different latitudes showed that the decreased developmental rate during the R1–R3 period can be attributed to longer days, rather than by supra‐optimal temperatures. We conclude that <jats:italic>E3</jats:italic>, in addition to <jats:italic>E4</jats:italic>, could potentially increase seed yield in cool regions under future warming.","PeriodicalId":10849,"journal":{"name":"Crop Science","volume":null,"pages":null},"PeriodicalIF":2.0000,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Crop Science","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1002/csc2.21314","RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"AGRONOMY","Score":null,"Total":0}
引用次数: 0
Abstract
Crop models have suggested high sensitivity of soybean [Glycine max (L.) Merr.] to day length and the resultant extension of the growth period as a concept to overcome yield loss due to climate warming. However, experimental validation of this concept is incomplete. The E3 and E4 loci encode phytochrome A isoforms and enhance sensitivity to day length. Our previous study showed that the dominant E4 allele can mitigate yield loss due to warming. In this study, we similarly tested the hypothesis that the dominant E3 allele can reduce yield loss caused by warming. One of the leading Japanese cultivars Enrei (e3/E4) and near‐isogenic lines (NIL‐e3e4, NIL‐E3e4, and NIL‐E3E4) in the Enrei genetic background were grown at near ambient temperature or either 2.0°C or 4.7°C above ambient temperature in temperature‐gradient chambers (TGCs) in a cool region in Japan. The number of days from sowing to beginning of flowering (R1) decreased with increasing temperature, regardless of genotype. However, increasing temperature extended the period from R1 to beginning of pod filling (R3) and increased pod number per plant and seed yield per plant in all genotypes except NIL‐e3e4. Combined data from the TGC experiment and from field trials across three different latitudes showed that the decreased developmental rate during the R1–R3 period can be attributed to longer days, rather than by supra‐optimal temperatures. We conclude that E3, in addition to E4, could potentially increase seed yield in cool regions under future warming.
期刊介绍:
Articles in Crop Science are of interest to researchers, policy makers, educators, and practitioners. The scope of articles in Crop Science includes crop breeding and genetics; crop physiology and metabolism; crop ecology, production, and management; seed physiology, production, and technology; turfgrass science; forage and grazing land ecology and management; genomics, molecular genetics, and biotechnology; germplasm collections and their use; and biomedical, health beneficial, and nutritionally enhanced plants. Crop Science publishes thematic collections of articles across its scope and includes topical Review and Interpretation, and Perspectives articles.