Daylength, Temperature and Solar Radiation Effects on the Phenology and Yield Formation of Spring Durum Wheat

Daylength, Temperature and Solar Radiation Effects on the Phenology and Yield Formation of Spring Durum Wheat

Future 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 o...

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Bibliographic Details
Published in:Journal of agronomy and crop science (1986) Vol. 202; no. 3; pp. 203 - 216
Main Authors: Villegas, D, C. Alfaro, K. Ammar, M. M. Cátedra, J. Crossa, L. F. García del Moral, C. Royo
Format: Journal Article
Language:English
Published: Paul Parey 01-06-2016
Blackwell Publishing Ltd
Subjects:
air temperature
crop yield
daylength
durum wheat
field experimentation
filling period
flowering
food security
genotype
harvest index
latitude
phenology
photoperiod
radiation
seeds
solar radiation
sowing
spring
temperature
Triticum aestivum
yield components
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Summary:Future 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.
Bibliography:http://dx.doi.org/10.1111/jac.12146
istex:331FB396A7F47DE13486821E77BF1A1B5A5F22E1
CICYT - No. AGL2012-37217
ArticleID:JAC12146
INIA - No. RTA2009-00085-00-00; No. RTA2012-00011-00-00
ark:/67375/WNG-6TCHP5NK-6
Spanish Ministry of Education and Science
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0931-2250
1439-037X
DOI:10.1111/jac.12146