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  • 1
    Electronic Resource
    Electronic Resource
    Maternal transmission of mitochondrial DNA in interspecific hybrids of Populus (1992)
    Springer
    Current genetics 22 (1992), S. 141-145 
    Details
    ISSN: 1432-0983
    Keywords: Poplars ; Mitochondrial genome ; Maternal inheritance ; Restriction fragment length polymorphism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Restriction fragment analysis was conducted to investigate the mode of inheritance of mitochondrial (mt) DNA in F1 progeny of two P. deltoides x P. deltoides, three P. deltoides x P. nigra, and two P. deltoides x P. maximowiczii controlled crosses, and in Populus x canadensis by using 16 restriction endonucleases and two heterologous probes of cloned mtDNA fragments of maize. Five restriction fragment length polymorphisms (RFLPs) of mtDNA differentiated P. deltoides from P. nigra, whereas three RFLPs of mtDNA separated P. deltoides from P. maximowiczii. In all cases, F1 progeny of P. deltoides x P. nigra, and P. deltoides x P. maximowiczii, crosses had mtDNA restriction fragments of only their maternal P. deltoides parents. P. x canadensis had mtDNA restriction fragments of only P. deltoides. F1 progeny of intraspecific P. deltoides crosses also had the same mtDNA fragments as their maternal parent. The results clearly demonstrate uniparental-maternal inheritance of the mitochondrial genome in F1 interspecific hybrids of P. deltoides with P. nigra and P. maximowiczii.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00351474
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  • 2
    Electronic Resource
    Electronic Resource
    Genetic biodiversity impacts of silvicultural practices and phenotypic selection in white spruce (1999)
    Springer
    Theoretical and applied genetics 99 (1999), S. 954-961 
    Details
    ISSN: 1432-2242
    Keywords: Key words Genetic diversity ; Silvicultural practices ; Picea glauca ; Domestication ; Sustainable forest management ; Gene conservation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Forest-management practices relying on natural and/or artificial regeneration and domestication can significantly affect genetic diversity. The aim of the present study was to determine and compare the genetic diversity of the pristine old-growth, naturally and artificially regenerated and phenotypically selected white spruce, and to determine the genetic-diversity impacts of silvicultural practices. Genetic diversity was determined and compared for 51 random amplified polymorphic DNA (RAPD) loci for the adjacent natural old-growth, naturally regenerated and planted white spruce stands at each of four sites, one oldest plantation and open-pollinated progeny of 30 phenotypic tree-improvement selections of white spruce from Saskatchewan. Each of the 420 white spruce individuals sampled was genetically unique. The old-growth stands had the highest, and the phenotypic selections the lowest, genetic diversity. The genetic diversity of the natural regeneration was comparable to that of the old-growth, whereas the genetic diversity of the plantations was comparable to that of the selections. On average, the genetic diversity of the old-growth and natural regeneration was significantly higher than that of the plantations and selections. The mean percent of loci polymorphic, the number of alleles per locus, the effective number of alleles per locus, heterozygosity, and Shannon’s index was 88.7, 83.8, 72.2 and 66.7; 1.89, 1.84, 1.72 and 1.67; 1.69, 1.62, 1.53 and 1.46; 0.381, 0.349, 0.297 and 0.259; and 0.548, 0.506, 0.431 and 0.381 for the old-growth stands; natural regeneration; plantations; and open-pollinated progeny of selections; respectively. Reduced genetic diversity in the plantations and selections suggest that their genetic base is relatively narrow, and should therefore be broadened in order to maintain genetic diversity, and sustainably manage and conserve white spruce genetic resources.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220051402
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  • 3
    Electronic Resource
    Electronic Resource
    Associations of genes encoding allozymes peroxidase and superoxide dismutase in poplar and spruce species (1991)
    Springer
    Theoretical and applied genetics 81 (1991), S. 729-734 
    Details
    ISSN: 1432-2242
    Keywords: Populus ; Picea ; Peroxidase ; Superoxide dismutase ; Allozyme gene associations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Isozymes of peroxidase (PER) and superoxide dismutase (SOD) were analyzed in vegetative buds or very young leaves of seven species and two interspecific hybrids of Populus, in progenies of seven controlled crosses of three Populus species, and in needles of five Picea species and one putative hybrid. One to three PER, and one or two SOD zones of activity were observed. Electrophoretic mobility (EM) and banding phenotypes of isozymes of one PER locus were identical to those of one SOD locus in vegetative buds of five Populus species and hybrid. In leaves of the four Populus species and hybrid and progenies of controlled crosses, EM and phenotypes of isozymes of two PER loci were identical to those of two SOD loci. In Picea species, EM of isozymes of the only SOD locus was somewhat similar but not identical to that of one PER locus, and isozyme phenotypes of all individuals at the SOD locus were not identical to those at a PER locus. Chi-square tests verified the single-gene Mendelian control of the segregating allozyme variants at each of Per-L1 and Sod-1 in the three Populus species. The results of joint two-locus segregation tests indicated a very tight linkage and no recombination between Per-L1 and Sod-1 in three Populus species. Genes coding for isozymes of one or two PER loci are either presumably the same as, or very tightly linked to, the genes coding for isozymes of one or two SOD loci in the Populus species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00224981
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  • 4
    Electronic Resource
    Electronic Resource
    Inheritance of mitochondrial DNA in lentil (Lens culinaris Medik.) (1994)
    Springer
    Theoretical and applied genetics 89 (1994), S. 206-210 
    Details
    ISSN: 1432-2242
    Keywords: Lens culinaris ; Mitochondrial DNA ; Maternal inheritance ; Biparental mitochondrial inheritance ; Restriction fragment length polymorphism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Restriction fragment analysis was used to examine the inheritance of lentil mitochondrial DNA (mtDNA) in F1 and F5 progeny from intrasubspecific (Lens culinaris ssp. culinaris) crosses and in F1 progeny from intersubspecific (Lens culinaris ssp. orientalis x L. culinaris ssp. culinaris) crosses. Southern blots of digested parental and progeny DNA were hybridized to heterologous maize mtDNA probes specific to coxI and atp6 genes. Two restriction fragment polymorphisms separated L.c. ssp. culinaris ‘Laird’ and ‘Eston’ from L.c. ssp. culinaris ‘ILL5588’, and one restriction fragment polymorphism distinguished L.c. ssp. culinaris ‘Laird’ and ‘Eston’ from L.c. ssp. orientalis ‘LO4’. Twelve of 13 f1 progeny and all F5 progeny from the intrasubspecific crosses, and all F1 progeny from intersubspecific crosses had only maternal mtDNA restriction fragments. One f1 plant from an ‘Eston’ x ‘ILL5588’ cross inherited mtDNA fragments from both parents. Nuclear DNA inheritance was biparental in all F1 progeny.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00225143
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  • 5
    Electronic Resource
    Electronic Resource
    Chloroplast DNA variation in Populus. I. Intraspecific restriction fragment diversity within Populus deltoides, P. nigra and P. maximowiczii (1995)
    Springer
    Theoretical and applied genetics 90 (1995), S. 317-323 
    Details
    ISSN: 1432-2242
    Keywords: Poplars ; Plastid DNA ; Intraspecific variation ; Restriction fragment polymorphisms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We examined intraspecific chloroplast (cp) DNA variation within Populus deltoides, P. nigra, and P. maximowiczii by restriction fragment analysis using 16 restriction endonucleases and six heterologous probes of cloned Petunia cpDNA fragments. All three Populus species showed intraspecific cpDNA variation, which was intra- and inter-varietal in P. deltoides, intervarietal in P. nigra, and origin-specific in P. maximowiczii. Two varieties of P. deltoides, var deltoides and var occidentalis, showed distinct cp genomes/DNA. Three distinct cp genomes/DNA, separated by a loss or gain of 1 EcoRV restriction site and/or 1 restriction fragment length polymorphism (RFLP), were observed among the individuals of P. deltoides var deltoides. Within P. nigra, cpDNA of var italica was distinct from that of vars nigra and plantierensis by one RFLP and by a loss or gain of one BamHI restriction site. Populus maximowiczii clones of Chinese origin were separated from those of Japanese origin by a gain or loss of one ClaI restriction site in their cpDNA. The estimate of nucleotide substitutions per site in cpDNA was 0.07% between two varieties of P. deltoides, 0.05% between var italica and var nigra or plantierensis of P. nigra, and 0.01% between Japanese and Chinese accessions of P. maximowiczii.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00221971
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  • 6
    Electronic Resource
    Electronic Resource
    Chloroplast DNA variation in Populus. II. Interspecific restriction fragment polymorphisms and genetic relationships among Populus deltoides, P. nigra, P. maximowiczii, and P. x canadensis (1995)
    Springer
    Theoretical and applied genetics 90 (1995), S. 324-330 
    Details
    ISSN: 1432-2242
    Keywords: Poplars ; Chloroplast DNA Phylogenetics ; Interspecific variation Restriction fragment polymorphisms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Restriction fragment analysis was conducted to determine interspecific chloroplast DNA (cpDNA) variation and genetic relationships among Populus deltoides, P. nigra, P. x canadensis (P. deltoides x P. nigra), and P. maximowiczii. Total cellular DNAs of these poplars were digested with 16 restriction endonucleases, and Southern blots of the restriction digests were probed with six different cloned cpDNA fragments from Petunia. P. deltoides, P. nigra, and P. maximowiczii each had a distinct chloroplast genome, separated by many restriction-site and restriction-fragment-length mutations, predominantly in the large single-copy region of the genome. P. x canadensis shared the same cpDNA restriction fragment patterns as P. deltoides var. deltoides. P. nigra was most diverged from P. deltoides, and P. deltoides showed close cpDNA relationships to P. maximowiczii. Nucleotide substitutions per site in cpDNA were 0.0036 between P. deltoides and P. maximowiczii, 0.0071 between P. nigra and P. maximowiczii, and 0.0077 between P. deltoides and P. nigra. We suggest that P. nigra should be classified in a new separate section, the Nigrae.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00221972
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  • 7
    Electronic Resource
    Electronic Resource
    Chloroplast DNA variation in Populus. III. Novel chloroplast DNA variants in natural Populus x canadensis hybrids (1995)
    Springer
    Theoretical and applied genetics 90 (1995), S. 331-334 
    Details
    ISSN: 1432-2242
    Keywords: Interspecific poplar hybrids ; Non-parental chloroplast DNA fragments ; Novel organelle DNA ; RFLP ; Chloroplast DNA recombination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A rare phenomenon of the occurrence of novel non-parental chloroplast DNA (cpDNA) variants in natural sexual interspecific hybrids between Populus deltoides var deltoides and P. nigra, P. x canadensis is described. Restriction fragment variation of cpDNA in 17 P. x canadensis cultivars was examined and compared with that of representative samples of P. deltoides and P. nigra using 83 combinations of 16 restriction enzymes and six Petunia hybrida cpDNA probes. Twelve cultivars had one to five novel non-parental cpDNA fragments in the chloroplast genome region homologous to the 9.0-kb PstI cpDNA fragment of Petunia from the large single-copy region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00221973
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  • 8
    Electronic Resource
    Electronic Resource
    Genetic characterization and relationships of Populus alba, P. tremula, and P. x canescens, and their clones (1992)
    Springer
    Theoretical and applied genetics 84 (1992), S. 291-298 
    Details
    ISSN: 1432-2242
    Keywords: Poplars ; Marker isozymes ; Interspecific genetic identities and distances ; Natural hybrids ; Clone identification ; Molecular evolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Isozyme analysis was conducted on individuals of Populus alba L., P. tremula L., and P. × canescens Smith to genetically characterize and differentiate species, hybrids, and individuals, and to determine genetic relationships among them. Thirty gene loci, with 71 alleles, coding for 15 enzymes were observed. Individuals could be identified on the basis of their multilocus genotypes. There were 21 unique multilocus genotypes among 23 P. alba clones. Five P. alba clones from Canada were genetically distinct from each other. Each of the 18 P. tremula and 15 P. × canescens clones had unique multilocus genotypes. Thirteen clones had a unique genotype at a single locus. Percentage of polymorphic loci, average number of alleles per locus, and mean observed heterozygosity were, respectively, 50.0, 1.86, and 0.085 in P. alba, 51.7, 1.66, and 0.096 in P. tremula, and 51.7, 1.86, and 0.157 in P. × canescens. Populus alba and P. tremula were genetically distinct from each other and could be distinguished by mutually exclusive alleles at Aco-3, P. tremula-specific gene Mdh-3, and allele frequency differences at 6 loci. Populus × canescens had allele contributions of P. alba and P. tremula. However, their allele frequencies were closer to those of P. alba than being truly intermediate. The mean genetic identity was 0.749 between P. alba and P. tremula, 0.987 between P. alba and P. × canescens, and 0.817 between P. tremula and P. × canescens. Canonical discriminant analysis of multilocus genotypes separated P. alba, P. tremula, and P. × canescens into three distinct groups and portrayed similar interspecific relationship as above. Our results suggested that the putative P. × canescens individuals consisted of a mixture of F1 hybrids of P. alba and P. tremula and their backcrosses to P. alba.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00229485
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  • 9
    Electronic Resource
    Electronic Resource
    Isolation and characterization of microsatellites in trembling aspen (Populus tremuloides) (1998)
    Springer
    Theoretical and applied genetics 96 (1998), S. 950-956 
    Details
    ISSN: 1432-2242
    Keywords: Key words Poplars (Populus) ; Simple sequencerepeats ; Microsatellite loci ; Polymorphism ; Clone identification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  We have identified, isolated, and characterized microsatellite/simple sequence repeat (SSR) loci in trembling aspen (Populus tremuloides) by screening partial genomic libraries. We have also examined the compatibility and use of the P. tremuloides SSR primers to resolve microsatellites in other Populus species. Fourteen microsatellites were identified from 1600 clones screened. The TC/AG microsatellites were the most abundant. A total of 29 alleles were detected in 36 P. tremuloides individuals at the four SSR loci (two each of di- and tri-nucleotide repeats) characterized. The number of alleles at the SSR loci ranged from 5 to 11, with an average of 7.25 alleles per locus, and the observed heterozygosity ranged from 0.19 to 0.82, with a mean of 0.46 per locus. Although the highest polymorphism was observed for a dinucleotide SSR locus, the trinucleotide SSR loci showed substantial polymorphism. There were 34 unique multilocus genotypes among the 36 P. tremuloides individuals examined, and 89% of the individuals had unique multilocus genotypes. Two pairs of SSR primers were successful in PCR, amplifying genomic DNA and resolving microsatellites of comparable size from Populus deltoides, P. nigra, P.×canadensis, and P. maximowiczii. The microsatellite DNA markers developed could be used for clonal fingerprinting, certification of controlled crosses, genome mapping, marker-assisted early selection, genetic diversity assessments, and conservation and sustainable management of poplar genetic resources.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050825
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  • 10
    Electronic Resource
    Electronic Resource
    Chloroplast DNA inheritance in Populus (1992)
    Springer
    Theoretical and applied genetics 84 (1992), S. 280-285 
    Details
    ISSN: 1432-2242
    Keywords: Populus ; Chloroplast DNA ; Maternal plastid inheritance ; Restriction fragment length polymorphism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The inheritance of chloroplast (cp) DNA was examined in F1 hybrid progenies of two Populus deltoides intraspecific controlled crosses and three P. deltoides × P. nigra and two P. deltoides × P. maximowiczii interspecific controlled crosses by restriction fragment analysis. Southern blots of restriction digests of parental and progeny DNAs were hybridized to cloned cpDNA fragments of Petunia hybrida. Sixteen enzymes and five heterologous cpDNA probes were used to screen restriction fragment polymorphisms among the parents. The mode of cpDNA inheritance was demonstrated in progenies of P. deltoides × P. nigra crosses with 26 restriction fragment polymorphisms of cpDNA differentiating P. deltoides from P. nigra, as revealed by 12 enzyme-probe combinations, and in progenies of P. deltoides × P. maximowiczii crosses with 12 restriction fragment polymorphisms separating P. deltoides from P. maximowiczii, as revealed by 7 restriction enzyme-probe combinations. In all cases, F1 offspring of P. deltoides × P. nigra and P. deltoides × P. maximowiczii crosses had cpDNA restriction fragments of only their maternal P. deltoides parent. The results clearly demonstrated uniparental-maternal inheritance of the chloroplast genome in interspecific hybrids of P. deltoides with P. nigra and P. maximowiczii. Intraspecific P. deltoides hybrids also had the same cpDNA restriction fragments as their maternal parent. Maternal inheritance of the chloroplast genome in Populus is in agreement with what has been observed for most other angiosperms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00229483
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