Evaluation of chlorophyll content as selection criteria for drought tolerance in wheat
Keywords:
Water stress, photosynthetic pigments, wheat crossesAbstract
Drought and water deficit are two major limiting factors in wheat production. The genotypes having high chlorophyll content express a good photosynthesis rate and ability to tolerate different level of drought. As such, the evaluation of chlorophyll content can be an effective method of selecting tolerant wheat genotypes.The goal of this work was to assess the performance and improvement potential for chlorophyll content in case of 21 F1 crosses between seven wheat varieties, genetically and ecologically differentiated. For most of the combinations the inheritance of chlorophyll content was controlled by over dominance effects, associated generally with a decrease of this trait. For Fundulea 4 x Apache and Alex x Apache the incomplete dominance leads to a decrease of chlorophyll content. For Xenos x Alex the complete dominance is acting with a negative effect in the inheritance of this trait, while for Fundulea 4 x Xenos the dominance effects are very low. The crosses Fundulea 4 x GKKapos, Fundulea 4 x Alex and Xenos x Turda 2000 showed the highest potential to improve the chlorophyll content in wheat. In this regard, those combinations can be used as genitors or as selection material.
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