Morphophysiological diversity and its association with herbicide resistance in Echinochloa ecotypes

dc.contributor.authorLiu, Ruien
dc.contributor.authorSingh, Vijayen
dc.contributor.authorAbugho, Sethen
dc.contributor.authorLin, Hao-Shengen
dc.contributor.authorZhou, Xin-Genen
dc.contributor.authorBagavathiannan, Muthukumar V.en
dc.date.accessioned2022-01-18T14:18:26Zen
dc.date.available2022-01-18T14:18:26Zen
dc.date.issued2021-10-01en
dc.date.updated2022-01-18T14:18:24Zen
dc.description.abstractThe genus Echinochloa constitutes some of the most prominent weed species found in rice (Oryza sativa L.) production worldwide. The taxonomy of Echinochloa is complex due to its morphological variations. The morphophysiological diversity and taxonomic characteristics of Echinochloa ecotypes infesting rice fields in Texas are unknown. A total of 54 Echinochloa ecotypes collected during late-season field surveys in 2015 and 2016 were characterized in a common garden in 2017. Plants were characterized for 14 morphophysiological traits, including stem angle; stem color; plant height; leaf color; leaf texture; flag leaf length, width, and angle; days to flowering; panicle length; plant biomass; seed shattering; seed yield; and seed dormancy. Principal component analysis indicated that 4 (plant height, flag leaf length, seed shattering, and seed germination) of the 14 phenological traits characterized here had significantly contributed to the overall morphological diversity of Echinochloa spp. Results showed wide interpopulation diversity for the measured traits among the E. colona ecotypes, as well as diverse intrapopulation variability in all three Echinochloa species studied, including barnyardgrass [Echinochloa crus-galli (L.) P. Beauv.], junglerice [<jats:italic>Echinochloa colona</jats:italic> (L.) Link], and rough barnyardgrass [<jats:italic>Echinochloa muricata</jats:italic> (P. Beauv.) Fernald]. Taxonomical classification revealed that the collection consisted of three <jats:italic>Echinochloa</jats:italic> species, with <jats:italic>E. colona</jats:italic> being the most dominant (96%), followed by <jats:italic>E</jats:italic>. <jats:italic>crus-galli</jats:italic> (2%), and <jats:italic>E</jats:italic>. <jats:italic>muricata</jats:italic> (2%). Correlation analysis of morphophysiological traits and resistance status to commonly used preemergence (clomazone, quinclorac) and postemergence herbicides (propanil, quinclorac, imazethapyr, and fenoxaprop-ethyl) failed to show any significant association. Findings from this study provided novel insights into the morphophysiological characteristics of <jats:italic>Echinochloa</jats:italic> ecotypes in rice production in Texas. The morphological diversity currently present in <jats:italic>Echinochloa</jats:italic> ecotypes could contribute to their adaptation to selection pressure imposed by different management tools, emphasizing the need for a diversified management approach to effectively control this weed species.en
dc.description.versionPublished versionen
dc.format.extent10 page(s)en
dc.format.mimetypeapplication/pdfen
dc.identifierPII S0043174521000643 (Article number)en
dc.identifier.doihttps://doi.org/10.1017/wsc.2021.64en
dc.identifier.eissn1550-2759en
dc.identifier.issn0043-1745en
dc.identifier.urihttp://hdl.handle.net/10919/107748en
dc.language.isoenen
dc.publisherCambridge University Pressen
dc.relation.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000731746900001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=930d57c9ac61a043676db62af60056c1en
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectLife Sciences & Biomedicineen
dc.subjectAgronomyen
dc.subjectPlant Sciencesen
dc.subjectAgricultureen
dc.subjectBarnyardgrassen
dc.subjectcommon garden studyen
dc.subjectgenetic diversityen
dc.subjectjunglericeen
dc.subjectrice weedsen
dc.subjecttaxonomyen
dc.subjectMOLECULAR MARKERSen
dc.subjectSEED-GERMINATIONen
dc.subjectRICEen
dc.subjectSIZEen
dc.subjectLEAFen
dc.subjectCLASSIFICATIONen
dc.subjectPHYLLOPOGONen
dc.subjectTRAITSen
dc.subjectCOLONAen
dc.subjectANGLEen
dc.subject0703 Crop and Pasture Productionen
dc.subjectAgronomy & Agricultureen
dc.titleMorphophysiological diversity and its association with herbicide resistance in Echinochloa ecotypesen
dc.title.serialWeed Scienceen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.otherArticleen
dc.type.otherEarly Accessen
dc.type.otherJournalen
pubs.organisational-group/Virginia Techen
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciencesen
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciences/Eastern Shore ARECen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciences/CALS T&R Facultyen
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