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Genetic parameters and QTL analysis of δ 13 C and ring width in maritime pine
Author(s) -
Brendel O.,
Pot D.,
Plomion C.,
Rozenberg P.,
Guehl J.M.
Publication year - 2002
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1046/j.1365-3040.2002.00872.x
Subject(s) - heritability , quantitative trait locus , diallel cross , biology , quantitative genetics , trait , genetic variation , botany , genetics , gene , hybrid , computer science , programming language
Classical quantitative genetics and quantitative trait dissection analysis (QTL) approaches were used in order to investigate the genetic determinism of wood cellulose carbon isotope composition ( δ 13 C, a time integrated estimate of water use efficiency) and of diameter growth and their relationship on adult trees (15 years) of a forest tree species (maritime pine). A half diallel experimental set‐up was used to (1) estimate heritabilities for δ 13 C and ring width and (2) to decompose the phenotypic δ 13 C/growth correlation into its genetic and environmental components. Considerable variation was found for δ 13 C (range of over 3‰) and for ring width (range of over 5 mm) and significant heritabilities (narrow sense 0·17/0·19 for δ 13 C and ring width, respectively, 100% additivity). The significant phenotypic correlation between δ 13 C and ring width was not determined by the genetic component, but was attributable to environmental components. Using a genetic linkage map of a full‐sib family, four significant and four suggestive QTLs were detected for δ 13 C, the first for δ 13 C in a forest tree species, as far as known to the authors. Two significant and four suggestive QTLs were found for ring width. No co‐location of QTLs was found between δ 13 C and growth.