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Breeding Effects on Grain Filling, Biomass Partitioning, and Remobilization in Mediterranean Durum Wheat

^a IRTA, Cereal Breeding, Centre UdL-IRTA. Rovira Roure, 191, 25198 Lleida, Spain
^b Dep. de Fisiología Vegetal, Facultad de Ciencias, Inst. de Biotecnología, Univ. de Granada, 18071 Granada, Spain

View larger version (31K): [in this window] [in a new window]   Fig. 1. Partitioning of main stem area and weight at anthesis on its components for Italian and Spanish cultivars released in different periods.

View larger version (16K): [in this window] [in a new window]   Fig. 2. Relative contribution of preanthesis assimilates accumulated on main stem components to the grain yield of the main spike for Italian and Spanish cultivars released in different periods.

View larger version (16K): [in this window] [in a new window]   Fig. 3. Principal component (PC) analysis projections on axes 1 and 2. (a) Eigenvalues are presented as vectors for the following traits: contribution of preanthesis assimilates to the grain by the spike (CS), flag leaf blade (CFB), flag leaf sheath (CFS), other leaf blades (CL), and stem (CST), final grain weight (WG), dry weight of the spike (WS), flag leaf blade (WFB), flag leaf sheath (WFS), other leaf blades (WL), and stem (WST), days from sowing to anthesis (DSA), relative main stem weight with regard to total aboveground plant biomass (%MS), and grain yield per hectare. (b) Values of the cultivars are symbolized by their period and country: old Italian (OI), intermediate Italian (II), modern Italian (MI), old Spanish (OS), intermediate Spanish (IS), and modern Spanish (MS).