Genomics Technologies for Improving Salt Tolerance in Wheat
2018
AMIT KUMAR SINGH, RAKESH SINGH, RAJESH KUMAR,
SHIKSHA CHAURASIA, SHEEL YADAV, SUNDEEP KUMAR, and
DHARMMAPRAKASH P. WANKHEDEABSTRACTSalinity tolerance in plants is a complex trait. Besides being controlled by
many genes, it is also influenced by environmental conditions. Large and
complex genome in wheat also poses many difficulties in gene discovery/
genetic mapping of salinity tolerance associated traits. On the other
hand, recent advances in genomics and availability of high-throughput
genome-wide analysis tools can greatly assist in deciphering molecular
basis of salt tolerance in wheat. Nowadays, “omics” approaches such as
transcriptomics, proteomics, metabolomics ionomics, and phenomics are
increasingly being applied to get a finer level understanding of mechanisms underlying salt tolerance in the salt-tolerant accessions of different
crops including wheat. Association mapping, which exploits diverse set
of germplasm lines have allowed fine high-resolution mapping to identify loci controlling abiotic stress tolerance associated traits in cereals.
Further, advanced breeding approaches such as marker-assisted selection
and transgenic are being exploited for fast tracking the development of
crop varieties. The, genomic selection is another promising approach for
breeding salt-tolerant varieties. In this chapter, we have discussed and
reviewed these approaches in grater details, with the focus on their potential in either underpinning molecular basis of salt tolerance or developing
salt-tolerant wheat varieties.
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