Document Type : Original Article
Authors
1
Cotton Breeding Section , Cotton Research Institute, ARC.
2
Cotton Physiology Section , Cotton Research Institute, ARC.
Abstract
Two experiments were carried out at Sakha Agricultural Research Station , Cotton Research Institute , to study the effect of drought on morphological , yield , yield components and physiological traits in some cotton cultivars . This study comprised some Egyptian cotton cultivars i.e. G.91, G.89, G.85, G.88, G.70, G. 89x G.86 , G.89 x Pima S6, G.86 and G.80. Were planted under drought condition which toke five once irrigation and normal condition, which toke eight once irrigation as control .
The results obtained could be summarized as follows :-
1- Cultivars differently responded to drought conditions.
2- Drought condition tended to decreased number of fruiting branches , dry weight , plant height , leaf area index, boll weight , seed and lint cotton yield per plant , seed index , lint percentage , number of bolls per plant , total chlorophyll , proteine and oil percentage in seeds.
3- The proline content in leaves was increased as a result of water stress conditions (drought) .
4- G.86 and G.80 observed the highest values of content of proline in leaves and had a highest yield and its components under drought stress.
5- For plant breeder , these results very important to select plants had higher proline content in leaves as indicator to obtained plants more tolerant to drought and highly yielding .
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