Daylength, temperature and solar radiation effects on the phenology and yield formation of spring durum wheat

dc.creatorVillegas, D.
dc.creatorAlfaro, C.
dc.creatorAmmar, K.
dc.creatorCátedra, M.M.
dc.creatorCrossa, J.
dc.creatorGarcia del Moral, L.F.
dc.creatorRoyo, C.
dc.date2019-01-09T20:28:00Z
dc.date2019-01-09T20:28:00Z
dc.date2016
dc.date.accessioned2023-07-17T20:03:16Z
dc.date.available2023-07-17T20:03:16Z
dc.identifier0931-2250
dc.identifier1439-037X
dc.identifierhttps://hdl.handle.net/10883/19720
dc.identifier10.1111/jac.12146
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7511599
dc.descriptionFuture food security will depend on crop adaptation to changing environments. We studied the limitations imposed by daylength, temperature and solar radiation on wheat yield in eight field experiments conducted at contrasting northern latitudes and involving 42 adapted spring durum wheat genotypes of divergent phenology, and reduced or without photoperiod sensitivity. Air temperatures averaged from sowing to anthesis (SA) increased from northern to southern sites, while daylength and minimum temperatures from anthesis to maturity (grain filling, GF) followed the opposite trend, due to differences in the latitude of sites. The site effect explained 96 % of the variation in the number of days SA, which was much smaller in southern sites. Average minimum daily temperatures above 6.9 °C before anthesis and below 10.8 °C during GF accompanied by photoperiods during GF of less than 14.2 h resulted in less than 14 000 kernels m−2, which was the threshold below which kernel number limited yield. Radiation during GF lower than 1.8 kJ kernel−1 day−1 limited kernel weight, which was then a constraint to the achievement of yield potential.
dc.description203-216
dc.formatPDF
dc.languageEnglish
dc.publisherBlackwellVerlag GmbH
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dc.rightsOpen Access
dc.source3
dc.source202
dc.sourceJournal of Agronomy and Crop Science
dc.subjectAGRICULTURAL SCIENCES AND BIOTECHNOLOGY
dc.subjectDay Length
dc.subjectPHOTOPERIODICITY
dc.subjectHARVEST INDEX
dc.subjectRADIATION
dc.subjectTEMPERATURE
dc.subjectYIELD COMPONENTS
dc.titleDaylength, temperature and solar radiation effects on the phenology and yield formation of spring durum wheat
dc.typeArticle
dc.coverageUnited States


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