<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Using genetic mapping and genomics approaches in\r\nunderstanding and improving drought tolerance in pearl\r\nmillet"^^ . "Drought at the reproductive stage is a major constraint to pearl millet [Pennisetum glaucum (L.) R. Br.] productivity.\r\nQuantitative trait locus (QTL) mapping provides a means to dissect complex traits, such as drought tolerance, into\r\ntheir components, each of which is controlled by QTLs. Molecular marker-supported genotypic information at the\r\nidentified QTLs then enables quick and accurate accumulation of desirable alleles in plant breeding programmes.\r\nRecent genetic mapping research in pearl millet has mapped several QTLs for grain yield and its components under\r\nterminal drought stress conditions. Most importantly, a major QTL associated with grain yield and for the drought\r\ntolerance of grain yield in drought stress environments has been identified on linkage group 2 (LG 2) which accounts\r\nfor up to 32% of the phenotypic variation of grain yield in mapping population testcrosses. The effect of this QTL has\r\nbeen validated in two independent marker-assisted backcrossing programmes, where 30% improvement in grain\r\nyield general combining ability (GCA) expected of this QTL under terminal drought stress conditions was recovered\r\nin the QTL introgression lines. To transfer effectively favourable alleles of this QTL into pearl millet varieties that\r\notherwise are high yielding and adapted to specific agricultural zones, efforts are currently underway to develop\r\nclosely spaced gene-based markers within this drought tolerance (DT)-QTL. In this review, an overview is provided\r\nof information on the genetic maps developed in pearl millet for mapping drought tolerance traits and their\r\napplications in identifying and characterizing DT-QTLs. Marker-assisted transfer of desirable QTL alleles to elite\r\nparent backgrounds, and results from introgression line validation in multiple terminal drought stress environments\r\nare discussed. Current efforts undertaken towards delimiting the interval of a major DT-QTL mapping to LG 2, and\r\ntowards identifying candidate genes and physiologies underlying this QTL are presented. Highly specialized genetic\r\nstocks [QTL-near-isogenic lines (NILs), a high-resolution cross, and a germplasm population] and genomic\r\nresources (gene sequences, gene-based markers, and comparative genomics information) specifically developed\r\nfor these purposes are discussed."^^ . "2011" . . "62" . "2" . . "Oxford University Press"^^ . . . "Journal of Experimental Botany"^^ . . . . . . . . . . . . . . "R S"^^ . "Yadav"^^ . "R S Yadav"^^ . . "D"^^ . "Sehgal"^^ . "D Sehgal"^^ . . "V"^^ . "Vadez"^^ . "V Vadez"^^ . . . . . . "Using genetic mapping and genomics approaches in\r\nunderstanding and improving drought tolerance in pearl\r\nmillet (PDF)"^^ . . . . . . . . "Using genetic mapping and genomics approaches in\r\nunderstanding and improving drought tolerance in pearl\r\nmillet (Image (JPEG))"^^ . . . . . "HTML Summary of #37 \n\nUsing genetic mapping and genomics approaches in \nunderstanding and improving drought tolerance in pearl \nmillet\n\n" . "text/html" . . . "Millets"@en . .