Drought susceptibility of modern rice varieties: an effect of linkage of drought tolerance with undesirable traits

• DOI: 10.1038/srep14799
• Publication Date: 2015-10-13T09:27:46Z
• Authors: Prashant Vikram; B. P. Mallikarjun...; Shalabh Dixit; Renu Singh; Bikram P. Singh; Berta Miro; Ajay Kohli; Amelia Henry; N. K. Singh; Arvind Kumar
• Keywords: Drought Tolerance; Genetic linkage; Linkage (software)

Abstract Green Revolution (GR) rice varieties are high yielding but typically drought sensitive. This is partly due to the tight linkage between loci governing plant height and tolerance. illustrated here through characterization of qDTY 1.1 , a QTL for grain yield under that co-segregates with GR gene sd1 semi-dwarf height. We report loss allele during was its in repulsion allele. Other drought-yield QTLs ( qDTY) also showed traits rejected varieties. Genetic diversity analysis 11 different regions grouped separately from traditional drought-tolerant lower frequency tolerance alleles. The increased understanding breaking undesirable has led development high-yielding dwarf lines positive alleles provides new hope extending benefits drought-prone rice-growing regions.