干旱区生态环境知识资源中心

Fifteen wheat genotypes were evaluated in the experimental area of the Department of Plant Breeding and Genetics, University of Arid Agriculture, Rawalpindi, during Rabi season 2004-2005. There were highly significant variations among the genotypes for number of tillers per plant, stomatal size, leaf venation, days to heading, days to maturity, spike length, 1000 grain weight and grain yield per hectare. Stomata size and stomatal frequency were negatively correlated. Leaf venation and stomatal frequency were positively correlated it means that high stomatal frequency May result in thick veins per unit leaf area. Stomatal frequency, stomatal size, days to maturity, grain spike-land 1000 grain weight showed small positive correlation with grain yield. These results suggested that plants may tolerate the stress conditions at the cost of yield. To cope with this situation the yield losses should be minimized.