A genetic linkage map for Eucalyptus globulus with candidate loci for wood,fibre, and floral traits |
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| Authors: | Thamarus K A Groom K Murrell J Byrne M Moran G F |
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| Institution: | (1) CSIRO Forestry and Forest Products and CRC for Sustainable Production Forestry, PO Box E4008, Kingston, ACT 2604, Australia e-mail: Karen.Thamarus@ffp.csiro.au Fax: +61-2-6281-8233, AU;(2) CSIRO Forestry and Forest Products, PO Box E4008, Kingston, ACT 2604, Australia, Present address: CALMScience, WA Herbarium, Locked Bag 104, Bentley Delivery Centre, WA 6983, Australia, AU |
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| Abstract: | A genetic linkage map containing potential candidate loci for wood, fibre and floral traits has been constructed for Eucalyptus globulus (Labill.) based on the segregation of 249 codominant loci in an outbred F1 population of 148 individuals. The map contains 204 RFLP loci, including 31 cambium-specific expressed sequence tags (ESTs)
and 14 known function genes, and 40 microsatellite and five isozyme loci. Independent male and female maps were constructed,
and the 98 loci (39%) that segregated in both parents were used to combine the parental maps into an integrated map. The 249
loci mapped to 11 major linkage groups (n=11 in eucalypts) and a 12th small linkage group containing three loci that segregated in the male parent only. Total map
distance is 1375 cM with an average interval of 6 cM. Forty one of the mapped loci identify known proteins (five isozymes)
or sequences with known function (14 genes and 22 ESTs). The mapped genes include enzymes involved in lignin and cell-wall
polysaccharide biosynthesis, and floral-development genes. This map will be used to locate quantitative trait loci for wood,
fibre, and other traits in Eucalyptus.
Received: 30 August 2000 / Accepted: 23 March 2001 |
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| Keywords: | Linkage map Candidate gene EST Microsatellite Lignin |
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