|Author:||Reynolds, M. ; Tuberosa, R.|
|Book Group Author:||NA|
Conventional breeding for drought-prone environments (DPE) has been complemented by using exotic germplasm to extend crop gene pools and physiological approaches that consider water uptake (WU), water-use efficiency (WUE), and harvest index (HI) as drivers of yield. Drivers are associated with proxy genetic markers, such as carbon-isotope discrimination for WUE, canopy temperature for WU, and anthesis-silking interval for HI in maize. Molecular markers associated with relevant quantitative trait loci are being developed. WUE has also been increased through combining understanding of root-to-shoot signaling with deficit irrigation. Impacts in DPE will be accelerated by combining proven technologies with promising new strategies such as marker-assisted selection, and genetic transformation, as well as conservation agriculture that can increase WU while averting soil degradation.
|Pages:||171 - 179|
|Journal:||Current Opinion in Plant Biology|
canopy, crop yield, drought, genes, genetic markers, genetictransformation, germplasm, harvest index, introduced species, maize,plant water relations, quantitative trait loci, root shoot ratio,selection, temperature, water uptake, water use efficiency, Zea mays,Zea, Poaceae, Cyperales, monocotyledons, angiosperms, Spermatophyta,plants, eukaryotes, corn, leaf canopy, Field Crops (FF005) (New March2000), Plant Breeding and Genetics (FF020), Plant Water Relations(FF062), Plant Production (FF100), Genetic Engineering, Gene Transferand Transgenics (WW100) (New June 2002), General Molecular Biology(ZZ360) (Discontinued March 2000)