Harmonization ratio of post- to pre-anthesis durations by thermal times for durum wheat cultivars in a Mediterranean environment

According to the results, cultivars were significantly different for VPtt, GFPtt, DMtt by the thermal times and GY. Cultivars were also significantly different for HR. Harmonization ratio was determined as 0.512 for Fuatbey-2000 cv. which supplied the highest GY. On the other hand, the lowest HRtt was obtained from Altar-84 STN cv. with 0.458 and its GY was also the lowest. Harmonization ratio was significantly and positively correlated with GY over the average results of 3 years. Significant correlations determined between GY and HRtt showed that this HRtt value might be considered as useful character on determination of wheat cultivars having balanced VPtt and GFPtt for higher GY. Thus, the varieties with the lowest HRtt may be excluded from the nurseries, in the early generations of breeding works.