Genetic diversity of photosynthetic characters in native populations of Triticum dicoccoides.

摘要: Wild emmer wheat (Triticum dicoccoides Korn) has shown wide genetic diversity for disease resistance and morpho-physiological traits of economic importance. Our objectives were to test variation (VG) in photosynthetic characteristics residing within between native populations sampled from three ecogeographical regions Israel, identify potential sources high efficiency future improvement. Accessions the center wild distribution (upper Jordan Valley) a relatively narrow geographical range showed greatest CO2-assimilation rate per unit leaf area (A) or chlorophyll (A/Chl). Genetic was absent internal CO2 concentration (Ci) water-use (WUE) generally lacking stomatal conductance (gs). Leaf area, although quite variable, not significant cofactor assessing photosynthesis. given population 10-times more A A/Chl than different locations region. with highest derived upland steppic located marginal habitats extending southward into Israel. Some accessions having capacity (A=32 μmol m-2 s-1) no reduction size constitute potentially valuable resource yet untapped improvement hexaploid (T. aestivum L.) wheat.