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  • 1
    Electronic Resource
    Electronic Resource
    Relationship between inbreeding depression and inbreeding coefficient in maritime pine (Pinus pinaster) (1996)
    Springer
    Theoretical and applied genetics 92 (1996), S. 347-356 
    Details
    ISSN: 1432-2242
    Keywords: Pinus pinaster ; Inbreeding depression ; Filled seeds ; Adult growth ; Genetic load
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The relationship between inbreeding depression and inbreeding coefficient (F) for several important traits was investigated in an 11-year trial of maritime pine (Pinus pinaster). Five levels of inbreeding (F=0; 0.125; 0.25; 0.5; 0.75) were obtained in a mating design involving ten plus-trees, or their progenies, as parents (total of 51 families). For F=0.75, the mean inbreeding depressions were 27% for height, 37% for circumference at breast height (63% for bole volume), 23% for basal straightness (better straightness of the inbred trees), and 89% for female fertility (number of cones). Large differences were observed among inbred families for the same level of inbreeding. The evolution of depression with F was more or less linear, depending on the traits. Significant differences among F-levels appeared very early for height (from 5-years of age). Inbreeding depression was much more expressed during unfavorable years than during favorable years for yearly height growth. When compared with other Pinus species, maritime pine appears to be less affected by inbreeding, especially for the percentage of filled seeds and general vigor. A reduced genetic load in maritime pine may result from the evolutionary history of the species and its scattered distribution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00223678
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  • 2
    Electronic Resource
    Electronic Resource
    Genomic analysis in maritime pine (Pinus pinaster). Comparison of two RAPD maps using selfed and open-pollinated seeds of the same individual (1995)
    Springer
    Theoretical and applied genetics 90 (1995), S. 1028-1034 
    Details
    ISSN: 1432-2242
    Keywords: RAPD markers ; Linkage map ; Map comparison ; Locus ordering ; Pinus pinaster
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two genomic maps were constructed for one individual tree of maritime pine, Pinus pinaster Ait., using a common set of 263 RAPD markers (random amplified polymorphic DNA). The RAPD markers were chosen from a larger number of polymorphic RAPD fragments on the basis of repeatability and inheritance in a three-generation pedigree. The maps were constructed from two independent mapping samples of 62 megagametophytes (In) from a self cross and from an open-pollinated cross. The markers were grouped (LOD≥4; θ≤0.25) and assigned to 13 major and 5 minor linkage groups. Two framework maps were constructed using the ordering criterion of interval support≥3. Comparison of the two framework maps suggested that the locus order was incorrect for 2% of the framework markers. A bootstrap analysis showed that this error rate was representative for our data set. The results showed that framework maps constructed using RAPD markers were repeatable and that differences in locus order for maps of different genotypes or species could result from chance. The total map distance was 1380 cM, and the map provided coverage of approximately 90% of the genome.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00222917
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  • 3
    Electronic Resource
    Electronic Resource
    Relationship between inbreeding depression and inbreeding coefficient in maritime pine (Pinus pinaster) (1996)
    Springer
    Theoretical and applied genetics 92 (1996), S. 347-356 
    Details
    ISSN: 1432-2242
    Keywords: Key words Pinus pinaster  ;  Inbreeding depression  ; Filled seeds  ;  Adult growth  ;  Genetic load
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  The relationship between inbreeding depression and inbreeding coefficient (F) for several important traits was investigated in an 11-year trial of maritime pine (Pinus pinaster). Five levels of inbreeding (F=0; 0.125; 0.25; 0.5; 0.75) were obtained in a mating design involving ten plus-trees, or their progenies, as parents (total of 51 families). For F=0.75, the mean inbreeding depressions were 27% for height, 37% for circumference at breast height (63% for bole volume), 23% for basal straightness (better straightness of the inbred trees), and 89% for female fertility (number of cones). Large differences were observed among inbred families for the same level of inbreeding. The evolution of depression with F was more or less linear, depending on the traits. Significant differences among F-levels appeared very early for height (from 5-years of age). Inbreeding depression was much more expressed during unfavorable years than during favorable years for yearly height growth. When compared with other Pinus species, maritime pine appears to be less affected by inbreeding, especially for the percentage of filled seeds and general vigor. A reduced genetic load in maritime pine may result from the evolutionary history of the species and its scattered distribution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050134
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  • 4
    Electronic Resource
    Electronic Resource
    Utilization of pedigree information to estimate genetic parameters from large unbalanced data sets in apple (1998)
    Springer
    Theoretical and applied genetics 96 (1998), S. 1077-1085 
    Details
    ISSN: 1432-2242
    Keywords: Key words Heritability ; Genetic correlation ; Apple breeding ; Pedigree information ; Restricted maximum likelihood
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Genetic parameters (narrow-sense heritabilities and genetic correlations) were estimated for major agronomical traits in apple from large unbalanced data sets, with the help of wide-pedigree information. The software REML VCE (Groeneveld 1996) took into account the complex pedigree of the French apple-breeding population, thanks to the restricted maximum likelihood procedure combined with the construction of the entire relationship matrix between hybrids planted in the field and their ancestors. Narrow-sense heritability estimates ranged from 0.34 to 0.68 for traits exhibiting a normal distribution. Heritability values around 0.35–0.40 were obtained for fruit characteristics (size, texture, flavour, juice content, attractiveness, russeting). Higher values of heritability were obtained for vigour, assessed by the circumference of the trunk (0.51), and powdery mildew resistance (0.68). Additive genetic correlations between traits were also estimated, showing a very high relationship between fruit-quality traits. Vigour and powdery mildew resistance were slightly correlated with the other traits. Utilization of the ‘individual genetic model’ for the estimation of genetic parameters and breeding values in apple is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050842
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  • 5
    Electronic Resource
    Electronic Resource
    Genetic dissection of height in maritime pine seedlings raised under accelerated growth conditions (1996)
    Springer
    Theoretical and applied genetics 93 (1996), S. 849-858 
    Details
    ISSN: 1432-2242
    Keywords: Pinus pinaster ; Maturation ; Height ; RAPD ; QTL ; Megagametophyte
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Random Amplified Polymorphic DNAs (RAPDs) were used to investigate quantitative trait loci (QTL) for traits related to height growth on 126 F2 seedlings of maritime pine (Pinuspinaster Ait). The haploid megagametophyte was used to determine the maternal genotype of each F2 individual. The seedlings were raised for 2 years in a greenhouse under accelerated growth conditions consisting of intense fertilization combined with continuous light treatments. Total height was measured at different developmental stages, and height growth components were measured after the second growth period. QTLs were identified for each trait. For total height, QTLs of different developmental stages were located on distinct linkage groups. However, rather than a complete temporal change in QTL expression, our results showed that maturation may induce a progressive shift of the genetic control of height growth. This may provide an explanation for a low juvenile-mature phenotypic correlation previously reported for height. Height growth components related to the initiation (controlled by the apical meristem) and elongation of shoot cycles (controlled by the subapical meristem) were mapped to different chromosomes, suggesting that the activity of these meristems is controlled by separate genetic mechanisms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00224085
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  • 6
    Electronic Resource
    Electronic Resource
    Quantitative genetic analysis and comparison of physical and sensory descriptors relating to fruit flesh firmness in apple (Malus pumila Mill.) (2000)
    Springer
    Theoretical and applied genetics 100 (2000), S. 1074-1084 
    Details
    ISSN: 1432-2242
    Keywords: Key words Apple ; Fruit ; Firmness ; Texture ; QTL analysis ; Genes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Texture is a major component of consumer preference for eating-quality in apple. A quantitative genetic analysis of traits associated with fruit-flesh firmness was carried out. This was based on segregation in an unselected mapping population replicated at six sites and harvested over 2 years. Different methods of assessment were compared, and a principal components analysis carried out. Instrumental measures used were Magness-Taylor penetrometer readings, stiffness by acoustic resonance, and a range of sensory descriptors assessed by a trained panel. There were good correlations between some measures, although stiffness was poorly correlated. Whilst genotype by environment effects were large, significant effects were attributable to the genotype, and these were used to detect QTLs. Significant QTLs were detected on seven linkage groups, with large effects on linkage groups L01, L10 and L16. Whilst there was a poor correlation between acoustic stiffness and other measures, the significant and suggestive QTL detected for stiffness on linkage group L10 did represent a subset of significant QTLs detected for the penetrometer measure. The use of sensory assessment proved valuable in detecting QTLs representing different attributes of fruit texture. The possibility of interaction between significant QTLs for fruit texture and other strongly selected traits such as scab resistance and fruit acidity is addressed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220051389
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  • 7
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    Genomic mapping in Pinus pinaster (maritime pine) using RAPD and protein markers (1995)
    Springer Nature
    Details
    Publication Date: 1995-06-01
    Print ISSN: 0018-067X
    Electronic ISSN: 1365-2540
    Topics: Biology
    Published by Springer Nature
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  • 8
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    Interaction famille x site dans un test tristationnel de descendances de Douglas (Pseudotsuga menziesii (Mirb.) Franco) (1987)
    EDP Sciences
    Details
    Publication Date: 1987-01-01
    Print ISSN: 0003-4312
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by EDP Sciences
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  • 9
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    A new versatile database created for geneticists and breeders to link molecular and phenotypic data in perennial crops: the AppleBreed DataBase (2007)
    Oxford University Press
    Details
    Publication Date: 2007-01-19
    Print ISSN: 1367-4803
    Electronic ISSN: 1460-2059
    Topics: Biology , Computer Science , Medicine
    Published by Oxford University Press
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