Determination of the yield performance and partial seed vernalization response of wheat varieties in late spring sowing

Increased temperatures due to climate change, vernalization requirements, and photoperiod sensitivity limit wheat yield. The most important cultural treatment in this is the selection of suitable varieties. This study was conducted for the purpose of investigating the growth performances of 17 different wheat varieties in late spring sowing and the effects on the seed of vernalization treatment. The growth of Bezostaja 1, Gerek 79, Dumlupınar, Kunduru 1149, Mv Suba, Kızıltan 91, Esperia, Eminbey, Ç-1252, Akbasak and Sahman wheat varieties stopped at the end of tillering; they did not reach flowering stage for any of the sowing times. The Einkorn and Emmer varieties completed their growth for all of the sowing times. The Tosunbey variety had a very good yield performance in the first sowing and partially in the second sowing. It is possible to say that these varieties have very little vernalization requirement or are able to meet their vernalization requirement at higher temperatures. The varieties mentioned can be easily sown for economic yield until the middle of April in a medium latitude continental climate zone, but yield values decreased noticeably as the sowing was delayed. On the other hand, the positive effect of the vernalization method used was rather limited.

Keywords:

Late sowing, , seed vernalization, spring sowing,

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