Source of Drought Resistance in Plant Breeding
There are three main sources of drought resistance in crop plants: 1) Cultivated varieties, 2) Germplasm collections, and 3) Wild relatives and wild species. Transfer of drought resistance is easy from cultivated variety and germplasm of cultivated species, because such material can be easily used in the breeding programmes. Moreover, there is no problem of cross incompatibility. When the source of drought resistance is a wild species, the transfer of resistance poses several problems such as cross incompatibility, hybrid inviability, hybrid sterility and linkage of several undesirable genes with desirable ones. Wild sources of drought resistance have been reported in wheat, sugarcane, tomato, and several other crops.
Wild Sources of Resistance to Drought and Salinity in Some Crop Plants:
Name of Crop
Name of Wild Species
Resistant Available for
Drought and Salinity