A physiological and genetic analysis of growth characteristics in Hordeum spontaneum
Publication date
2001-12-19
Authors
Rijn, C.P.E. van
Poorter, H.
Editors
Advisors
Lambers, H.
Voesenek, L.A.C.J.
Supervisors
DOI
Document Type
Dissertation
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Abstract
The aim of this project was to determine to what extent physiological, morphological and chemical growth characteristics are genetically linked and/or caused by common factors. First, 84 accessions of H. spontaneum from different habitats in Israel were screened for their variation in growth traits. A cross was made between contrasting genotypes and the F3 offspring were grown under close to optimal conditions and analysed for their growth characteristics. A map was constructed using AFLP markers. On chromosome 1 two QTLs for relative growth rate and specific leaf area were found at the same location. On chromosome 4 two QTLs for photosynthesis per unit leaf area and stomatal conductance were found at the same position. These traits are probably genetically linked or controlled by a common factor.
Keywords
relative growth rate, quantitative trait loci, seed mass, unit leaf rate, photosynthetic rate, specific leaf area, hordeum spontaneum, leaf morphology, net
assimilation rate