Perennial hybrids of Oryza sativa × Oryza rufipogon. Part II. Carbon exchange and assimilate partitioning

摘要: Abstract Oryza species differ in their degree of perenniality, which has implications for patterns carbon distribution the plant. Interspecific F1 hybrids sativa × Oryza rufipogon were compared with parental lines to assess whether they differed assimilate storage and at flowering after maturity first cohort panicles. The varied widely plant type, but on average had small size low main tiller weights anthesis, similar O. rufipogon, intermediate numbers final single cultivated rice. higher concentrations starch stems while interspecific exhibited comparatively leaf, stem + sheath, root sugar concentrations. Near substantial 14C label remained source (flag) leaf sativa hybrids, more was exported sink tissues. partitioned panicles than did rice less sheaths either parent. Hybrids that previously been identified as having above-average exchange rates (CER) not consistently from low-CER carbohydrate dynamics. itself maintains some perennial features, changes these traits might increase productivity.