| Abstrakt: |
The Yaqui Valley, Sonora, is the largest producer of durum wheat in Mexico, generating a production volume of 349,158 t annually, in average. Precisely, in this valley started the so-called Green Revolution. Currently, 90% of this production falls on the CIRNO C2008 wheat variety since 2008–2009 crop cycle, due to its genetic stability still under changing climate conditions. A study of the effect of incremental temperature variability on morphologic and agronomic variables of CIRNO C2008 wheat variety during the crop cycles from 2008–2009 to 2018–2019 was carried out at the Yaqui Valley, Mexico. The variability of the amount of land sown in each crop cycle is reported. We explore the correlations between temperature and tillering capacity, and number of productive tillers, as well as the relation between number of cold hours received by the crop and the biomass and grain yield. A temperature variation of 2.5 °C took place from the base crop cycle (2008–2009) to the 2018–2019 cycle. During this period, there was a 30% reduction in the amount of land dedicated to this variety. There was a negative and significant correlation between temperature and number of productive tillers. The number of cold hours received by the crop correlated positively with the number of productive tillers. The study allowed to conclude that, due to temperature increments during the 11 crop cycles, there is a reduction of 7.22% and 25.7% on biomass and grain yield, respectively. [ABSTRACT FROM AUTHOR] |
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