[Opportunities for increasing the productive potential of wheat from the Mediterranean region of Southern Portugal. 2 - Contribution of stored assimilates to grain filling]
1998
Dias, A.S: | Macas, B.M. | Coco, J.
In regions where plants are under different stresses like in the South of Portugal with a strong Mediterranean influence where high temperatures (Thermic stress) and low and erratic rainfall (Water stress and sometimes floading) usually can cause strong constraints in the yield of wheat, plant breeding is using more and more ecophysiological studies in order to understand the physiological behaviour of the crop in this so specific environment where the plant has to initiate and complete its growth cycle. In this study it is supposed the identification of genetic variability within 25 bread wheat lines on what concern to grain filling dynamics. Using Blum's methodology (1983), simulating drought effects by spraying a chemical desiccant, it was studied the contribution of assimilates on grain filling. The importance of this contribution could be seen in some genotypes which yielded above the average, after spraying, by a smaller reduction of grain weight
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