QTL associations for density and diameter in Pinus radiata and the potential for marker-aided selection
0301 basic medicine
Analysis of Variance
03 medical and health sciences
Phenotype
Quantitative Trait Loci
Pinus
Polymorphism, Restriction Fragment Length
Microsatellite Repeats
DOI:
10.1007/s00122-003-1446-2
Publication Date:
2004-02-09T16:18:16Z
AUTHORS (6)
ABSTRACT
A large full-sib family of radiata pine ( Pinus radiata Donn. ex D. Don) was used for quantitative trait locus (QTL) detection and independent verification. QTL detection experiments were carried out for juvenile wood density (JWD) and stem diameter at breast height (DBH) using selective genotyping. Evenly spaced RFLP and microsatellite markers were selected from an existing linkage map. QTLs were verified in an independent set of progeny from the same family. Based on map location, at least eight QTL positions for JWD and two for DBH were detected and verified. The percent variance accounted for by the markers ranged from 0.78% to 3.58%, suggesting a genomic architecture of many genes with small effect. Two unrelated "bridging" families were chosen as candidates for marker-aided selection (MAS), and six microsatellite markers showing an association with JWD or DBH were tested in these families. Of these, four markers showed a consistent association with JWD in one or both of the bridging families. Results from this study provide a basis for MAS in P. radiata.
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