Geographic pattern of genetic variation in photosynthetic capacity and growth in two hardwood species from British Columbia

Oecologia ◽  
2000 ◽  
Vol 123 (2) ◽  
pp. 168-174 ◽  
Author(s):  
A. Benowicz ◽  
R. D. Guy ◽  
Y. A. El-Kassaby
Keyword(s):  
British Columbia ◽  
Genetic Variation ◽  
Photosynthetic Capacity ◽  
Geographic Pattern ◽  
Hardwood Species

Polygamous Mating and High Levels of Genetic Variation in Lingcod, Ophiodon elongatus, of the Strait of Georgia, British Columbia

2004 ◽  
Vol 69 (1-4) ◽  
pp. 345-357 ◽  
Author(s):  
Ruth E. Withler ◽  
Jacquelynne R. King ◽  
Jeffrey B. Marliave ◽  
Brad Beaith ◽  
Shaorong Li ◽  
...  
Keyword(s):  
British Columbia ◽  
Genetic Variation ◽  
Strait Of Georgia ◽  
Ophiodon Elongatus

scholarly journals Genetic variation for photosynthetic capacity and efficiency in spring wheat

2019 ◽  
Vol 71 (7) ◽  
pp. 2299-2311 ◽  
Author(s):  
Viridiana Silva-Pérez ◽  
Joanne De Faveri ◽  
Gemma Molero ◽  
David M Deery ◽  
Anthony G Condon ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Stomatal Conductance ◽  
Photosynthetic Capacity ◽  
Genotypic Variation ◽  
Genotypic Diversity ◽  
Dry Mass ◽  
Co2 Assimilation ◽  
Leaf Nitrogen ◽  
Yield Potential

Abstract One way to increase yield potential in wheat is screening for natural variation in photosynthesis. This study uses measured and modelled physiological parameters to explore genotypic diversity in photosynthetic capacity (Pc, Rubisco carboxylation capacity per unit leaf area at 25 °C) and efficiency (Peff, Pc per unit of leaf nitrogen) in wheat in relation to fertilizer, plant stage, and environment. Four experiments (Aus1, Aus2, Aus3, and Mex1) were carried out with diverse wheat collections to investigate genetic variation for Rubisco capacity (Vcmax25), electron transport rate (J), CO2 assimilation rate, stomatal conductance, and complementary plant functional traits: leaf nitrogen, leaf dry mass per unit area, and SPAD. Genotypes for Aus1 and Aus2 were grown in the glasshouse with two fertilizer levels. Genotypes for Aus3 and Mex1 experiments were grown in the field in Australia and Mexico, respectively. Results showed that Vcmax25 derived from gas exchange measurements is a robust parameter that does not depend on stomatal conductance and was positively correlated with Rubisco content measured in vitro. There was significant genotypic variation in most of the experiments for Pc and Peff. Heritability of Pc reached 0.7 and 0.9 for SPAD. Genotypic variation and heritability of traits show that there is scope for these traits to be used in pre-breeding programmes to improve photosynthesis with the ultimate objective of raising yield potential.

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