National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Developing salinity tolerant crop varieties will enable crops to grow in saline soils without compromising yield. Improved White Ponni (IWP) is a salt sensitive rice variety but it is widely cultivated for its grain quality and yield. Efforts were made to develop salt tolerant Improved White Ponni (IWP) lines by introgressing Saltol QTL from FL478 (Tolerant cultivar) through Marker Assisted Backcross Breeding (MABB). Foreground marker RM3412 was employed to select the positive genotypes harboring Saltol QTL. Under stress condition, Na+/K+ ratio ranged from 0.25 (IWP-10-13-3-20-2-2) to 1.36 (IWP). All the NILs viz., IWP-10-13-3-20-2-2 (0.25), IWP-10-13-3-20-2-5 (0.44), IWP-10-13-3-20-2-7 (0.42) and IWP-10-13-3-56-2-7 (0.52) recorded Na+/K+ ratio lesser ratio than IWP (1.36). The Near Isogenic Lines (NILs) showed nearly 60 - 84 per cent enhanced level of salinity tolerance compared to susceptible parent Improved White Ponni. This enhanced tolerance of NILs speculates to investigate the mechanism of salinity tolerance in NILs with a hypothesis of that do salinity tolerance and phytoremediation co-exist as two sides of a coin. The study concluded that NILs with Saltol QTL does not had phytoremediation ability but salinity and phytoremediation can coexist if NHX-type Na+/H+ antiporter genes are used to develop salinity tolerant rice genotype.
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