Identification of QTLs influencing wood property traits in loblolly pine (Pinus taeda L.). I. Physical wood properties

Citation
Mm. Sewell et al., Identification of QTLs influencing wood property traits in loblolly pine (Pinus taeda L.). I. Physical wood properties, THEOR A GEN, 101(8), 2000, pp. 1273-1281
Citations number
36
Categorie Soggetti
Plant Sciences","Animal & Plant Sciences
Journal title
THEORETICAL AND APPLIED GENETICS
ISSN journal
00405752 → ACNP
Volume
101
Issue
8
Year of publication
2000
Pages
1273 - 1281
Database
ISI
SICI code
0040-5752(200012)101:8<1273:IOQIWP>2.0.ZU;2-6
Abstract
Physical wood property traits for loblolly pine (Pinus taeda L.) were analy zed for the presence of quantitative trait loci (QTLs) in a three-generatio n outbred pedigree. These traits include wood specific gravity (wsg), volum e percentage of latewood (vol%), and microfibril angle (mfa). Phenotypic da ta were collected for rings 2-11 for wsg and vol%, and rings 3, 5 and 7 for mfa. Both earlywood and latewood were analyzed for each trait. An interval mapping approach designed for an outbred pedigree was used to estimate the number of QTLs, the magnitude of QTL effects, and their genomic position. Nine unique QTLs were detected for composite traits (average of all rings) for wsg, five for vol%, and five for mfa. The majority of these QTLs were v erified by analyses of individual-ring traits. Additional QTLs for each tra it were also detected by these individual-ring analyses. Most QTLs for wsg were specific to either earlywood or latewood, whereas each QTL for mfa was detected for both earlywood and latewood. Before these QTLs are utilized i n a breeding program, they should be verified in larger experiments and in different genetic and environmental backgrounds.