Isolation, characterization, inheritance and linkage of microsatellite DNA markers in white spruce (Picea glauca) and their usefulness in other spruce species

被引：53

作者：

Rajora O.P. ^{[1
]}

Rahman M.H. ^{[2
]}

Dayanandan S. ^{[2
,4
]}

Mosseler A. ^{[3
]}

机构：

[1] Department of Biology, Life Sciences Centre, Dalhousie University, Halifax

[2] Department of Renewable Resources, University of Alberta, Edmonton

[3] Canadian Forest Service, Atlantic Forestry Centre, Fredericton, NB E3B 5P7

[4] Biology Department, Concordia University, Montreal, Que. H3G 1M8

来源：

Molecular Genetics and Genomics | 2001年 / 264卷 / 6期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Cross-species compatibility and conservation of microsatellite loci; DNA fingerprinting; Microsatellite DNA markers; Simple sequence repeats; Spruce (Picea);

D O I：

10.1007/s004380000377

中图分类号：

学科分类号：

摘要：

Microsatellite DNA/simple-sequence-repeat (SSR) loci were identified, isolated and characterized in white spruce (Picea glauca) by screening both a non-enriched partial genomic library and a partial genomic library enriched for (AG/TC)n-containing clones. Inheritance and linkage of polymorphic SSR loci were determined in F1 progeny of four controlled crosses. We also assessed the compatibility and usefulness of the P. glauca microsatellite DNA markers in five other Picea species. Twenty-four microsatellites were identified by sequencing 32 clones selected from screens of 5400 clones from the two libraries. The (AG/TC)n microsatellites were the most abundant in the non-enriched library. Eight microsatellite DNA loci were of the single-copy type, and six of these were polymorphic. A total of 87 alleles were detected at the six polymorphic SSR loci in 32 P. glauca individuals drawn from several populations. The number of alleles found at these six SSR loci ranged from 2 to 22, with an average of 14.5 alleles per locus, and the observed heterozygosity ranged from 0.48 to 0.91, with a mean of 0.66 per locus. Parents of the controlled crosses were polymorphic for five of the six polymorphic SSR loci. Microsatellite DNA variants at each of these five SSR loci followed a single-locus, codominant, Mendelian inheritance pattern. Joint two-locus segregation tests indicated complete linkage between PGL13 and PGL14, and no linkage between any of the remaining SSR loci. Each of the 32 P. glauca individuals examined had unique single or two-locus genotypes. With the exception of non-amplification of PGL12 in P. sitchensis, P. mariana, and P. abies and the monomorphic nature of PGL7 in P. mariana, primer pairs for all six polymorphic SSR loci successfully amplified specific fragments from genomic DNA and resolved polymorphic microsatellites of comparable sizes in P. engelmanni, P. sitchensis, P. mariana, P. rubens, and P. abies. The closely related species P. mariana and P. rubens, and P. glauca and P. sitchensiss could be distinguished by the PGL12 SSR marker. The microsatellite DNA markers developed and reported here could be used for assisting various genetics, breeding, biotechnology, tree forensics, genome mapping, conservation, restoration, and sustainable forest management programs in spruce species.

引用

页码：871 / 882

页数：11

共 40 条

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