Ilkay Yavas

The Waterlogging Tolerance of Wheat Varieties in Western of Turkey

This research was conducted to determine the wheat varieties against waterlogging which was clearly increased in recent years. For this purpose, this study was performed at Field Crops and Soil Science Department of Agricultural Faculty of Adnan Menderes University during wheat growth stages of 2007-2008. The experimental design was randomized complete block design with split split plot arrangements. The main plots were temperature applications (heat and normal), the growth periods (Zadoks scale; GS14, GS32, GS14 + GS32, and control) were split plots and varieties were split-split plots. The eight different wheat varieties were evaluated in the pots. The waterlogging was performed during GS14, GS32 and GS14 + GS32. In a pot experiment, plants were subjected to waterlogging to the soil surface for 10 days. All applications and varieties decreased the single plant yield. The waterlogging caused a yield loss compared with wheat grown on well-drained soil. In this study, the crop loss due to waterlogging is highly temperature dependent. The severity of the effects of the waterlogging depends on the growth stage of the plot. When all applications were compared with control by means of yield performance, Sagittario and Basribey varieties were less affected than the others.

Natural crossing and isolation distance between cotton genotypes in turkey

Os objetivos deste estudo foram determinar a percentagem de cruzamentos livres, a distância de isolamento e as especies de insetos polinizadores na producao de sementes de algodao (Gossypium hirsutum L.) na regiao de Aydin, na Turquia. Foram utilizadas as caracteristicas ausencia de glândulas e folhas vermelhas como marcadores de G. hirsutum. Dois experimentos foram conduzidos durante dois anos, nos quais os cruzamentos livres em linhas e plantas adjacentes foram monitorados, tendo sido comprovada uma variacao na percentagem de cruzamentos livres que variou entre 0 e 13,3% dependendo do marcador genetico. No experimento de determinacao da distância de isolamento, nao se observou cruzamento natural em 2002, mas em 2003 sua percentagem foi de 0,8%, apenas nas primeiras linhas. Neste estudo, os campos de algodao foram visitados uma vez por semana, por sete semanas, para determinar o numero de especies de insetos polinizadores, tendo sido encontradas abelhas produtoras de mel. O numero encontrado foi de 2,14% (2002) e 1,30% (2003) para linhas adjacentes; 1,71% (2002) e 2,00% (2003) para plantas em parcelas com ausencia de glândulas. E recomendado que a distância de isolamento entre genotipos deva ser de aproximadamente 1 m.