Genetic architecture of leaf photosynthesis in rice revealed by different types of reciprocal mapping populations.

摘要: The improvement of leaf net photosynthetic rate (An) is a major challenge in enhancing crop productivity. However, the genetic control An among natural accessions still poorly understood. high-yielding indica cultivar Takanari has highest all rice cultivars, 20-30% higher than that high-quality japonica Koshihikari. By using reciprocal backcross inbred lines and chromosome segment substitution derived from cross between Koshihikari, we identified three quantitative trait loci (QTLs) where alleles enhanced plants with Koshihikari background five QTLs background. Two were expressed both backgrounds (type I QTL). expression other depended strongly on II These beneficial increased stomatal conductance, initial slope versus intercellular CO2 concentration, or at saturation. Pyramiding these consistently An. Some positively affected biomass production grain yield. associated photosynthesis yield can be valuable tool breeding programs via DNA marker-assisted selection.