Abstract
AbstractExistence of genetic variability for salt tolerance within species is of paramount importance in crop improvement program. Pokkali land race of Kerala, India is the international donor parent of most of the salinity tolerance breeding programs in rice. Here we report two new genetic resources, ‘Kuthiru’ and ‘Orkayama’ for salinity tolerance, from Kaipad saline tracts of Kerala. They differ in their morphological, physico-chemical characteristics and cooking qualities. Panicles of these cultivars are long with bold grains. Duration of ‘Kuthiru’ is 110 -120 days, and that of ‘Orkayama’ is 135 -140 days. Molecular analysis revealed that the salinity tolerance mechanism of both land races differ from each other. Using these land races for the first time in breeding program, as donors for salinity tolerance, two saline tolerant non-lodging high yielding red rice varieties, ‘Ezhome –1’ and ‘Ezhome -2’ were commercially released for cultivation in Kaipad rice tract of Kerala state, India in 2010.
Highlights
Existence of genetic variability for salt tolerance within species is of paramount importance in crop improvement program
Salinity tolerant genetic resources and varieties of rice can play a major role to attain the goal of food security
The size of amplicon in ‘Kuthiru’ and Vytilla-511was bigger compared to other’s. This result indicates that the salinity tolerance mechanism of both Kaipad land races differ from each other
Summary
Existence of genetic variability for salt tolerance within species is of paramount importance in crop improvement program. Genetic improvement of salt tolerance of major cereal crops appears to be the most feasible and promising strategy for maintaining stable global food production 3. Salinity tolerant genetic resources and varieties of rice can play a major role to attain the goal of food security. Some degree of cultivar tolerance for salinity stresses available with certain traditional land races not exploited so far has great relevance in crop improvement.
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