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  • 11
    Electronic Resource
    Electronic Resource
    Genetics of Six Components of Autofertility in Vicia faba (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 110 (1993), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The inheritance of six components of autofertility was studied in faba beans in two consecutive years (1989 and 1990) by analysing parents, Fl and segregating generations of 14 crosses between preselected pure lines. Genetic analysis was performed by a joint scaling test proposed by Cavalli (1952). Additive gene effects were more important than dominance effects in flowers/node, pods/flower and ovules/ovary. In contrast, characters directly related with the seed such as pods/node, seeds/pod and, to a lesser extent, seeds/ovule showed high positive values of dominance. The three latter traits in general exhibited strong heterosis, probably due to genetic interactions. In order to produce selection gain, any breeding programme has to consider that dominance and heterosis vary according to the character involved. The present study reveals different degrees of dominance expression depending on cross specificity as well as on environmental conditions. The advantages of studying segregating generations instead of diallel crosses and the need for a simultaneous study of many crosses are emphasized in this paper.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.1993.tb00581.x
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  • 12
    Electronic Resource
    Electronic Resource
    Genotype-environment interaction in tomato (1982)
    Springer
    Theoretical and applied genetics 61 (1982), S. 273-277 
    Details
    ISSN: 1432-2242
    Keywords: Lycopersicon esculentum ; Genotype environment interaction by regression analysis ; Polyethylene ; Plastic greenhouse ; Polyethylene mulch
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Twelve varieties of tomato of economic importance and their hybrids (including reciprocals) were studied in four environments: inside and outside of greenhouses and with and without plastic mulching. Seven characters were recorded per plant per environment: (1) total yield, (2) fruit weight, (3) locules/fruit, (4) fruits/cluster, (5) earliness in maturity, (6) earliness in harvesting and (7) leaves between clusters. There was an almost general tendency for hybrids to show higher values than the parentals for characters (1), (4) and (7); the opposite was true for (2) and (3), even when the differences were not statistically significant at the 5% level. Environments were always highly significant; the effect of the greenhouse explained most of the variation. Genotype-environment interaction by regression analysis showed that the performance of the hybrids was generally higher than that of the parents for characters (1), (4) and (7). Total yield was higher, in general, in the most protected environments. Locules per fruit was very constant but when interaction did exist, the number of locules was higher in the less protected environments. Hybrids interacted with environments more strongly than parent lines. Earliness was the most environmental dependent characteristic the choice of early harvesting being irrelevant. Some of the hybrids obtained seem promising from a commercial point of view.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00273785
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  • 13
    Electronic Resource
    Electronic Resource
    Genetic changes under domestication in Vicia faba (1986)
    Springer
    Theoretical and applied genetics 72 (1986), S. 364-372 
    Details
    ISSN: 1432-2242
    Keywords: Inheritance ; Evolution ; Vicia faba ; Domestication
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The components of variation within each one of two sets of landraces and/or cultivars of Vicia faba, respectively constituted of primitive and advanced morphological types, were studied by means of two sets of 8 × 8 diallel crosses with two repetitions. The results show that primitive and modern forms differ from each other in both the intensity and the kind of selective pressures acting on them, mainly on those characters more modified through the domestication process: i.e., seed morphology and the number of flowers per node. Because of the paramount importance of the additive component in the primitive forms, it is suggested that the most important type of selection on them is the stabilizing one. On the contrary, in the most advanced forms the selection is directional and disruptive : directional towards greater yields, and disruptive separating two morphological types, ‘major’ and ‘equina’. The plant response to these different selective pressures has been to modify the genetic control of different characters: thus the primitive forms generally show only additivity while the most advanced forms show additivity as well as directional and asymmetrical dominance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00288574
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  • 14
    Electronic Resource
    Electronic Resource
    Using RAPDs to study phylogenetic relationships in Rosa (1996)
    Springer
    Theoretical and applied genetics 92 (1996), S. 273-277 
    Details
    ISSN: 1432-2242
    Keywords: Key words Rosa sp.  ;  RAPDs markers  ;  Polymerase chain reaction  ;  Phylogenetic relationships
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Nineteen species of rose (Rosa sp.) were analysed using Random Amplified Polymorphic DNA markers (RAPD). Each 10-base-long arbitrary primer produced a specific DNA banding pattern that grouped plants belonging to the same species and botanical sections as predicted from their genetic background. One hundred and seventy-five amplification products were examined by cluster analysis to assess the genetic relationships among species and their genetic distances. All of the accessions belonging to 1 species grouped together before branching to other species. Dendrograms constructed for intra- and inter-specific studies showed a good correlation with previous classifications by different authors based on morphological and cariological studies. Our results show that the RAPD technique is a sensitive and precise tool for genomic analysis in rose, being useful in assigning unclassified accessions to specific taxonomic groups or else allowing accessions classified by traditional criteria to be re-classified.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050123
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  • 15
    Electronic Resource
    Electronic Resource
    Genetic mapping of new morphological, isozyme and RAPD markers in Vicia faba L. using trisomics (1996)
    Springer
    Theoretical and applied genetics 93 (1996), S. 1130-1138 
    Details
    ISSN: 1432-2242
    Keywords: Vicia faba ; Trisomic ; Isozymes ; RAPDs ; Linkage groups
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Thirteen F2 families of faba bean (Vicia faba L.), descended from plants trisomic for chromosomes 3, 4, 5 and 6, have been analyzed for morphological, isozyme and RAPD markers. This allowed the establishment of linkage relationships among these markers as well as the assignment of some markers and/or linkage groups to their respective chromosomes. The linkage analysis of partially overlapping sets of informative genetic markers for the data pooled from 13 F2 families has revealed 48 linkage groups, six of which have been precisely assigned to specific chromosomes. A statistical procedure to analyze the data of joint segregation analysis in families derived from trisomic plants has been developed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00230136
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  • 16
    Electronic Resource
    Electronic Resource
    Genetics and mapping of new isozyme loci in Vicia faba L using trisomics (1995)
    Springer
    Theoretical and applied genetics 91 (1995), S. 783-789 
    Details
    ISSN: 1432-2242
    Keywords: Vicia faba ; Isozyme ; Trisomic ; Mapping
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Polymorphism in ten enzyme systems (ACO, ACP, AAT, EST, FK, ME, NAG, PRX, 6PGD, and SOD) in Vicia faba L. was analyzed, revealing 13 loci, six of which have not been reported before. Inheritance, genetics, possible location, and linkage analysis were studied in 13 different F2 populations trisomic for four of the six chromosomes (nos. 3, 4, 5, and 6) of the species. Each of these loci exhibited typical Mendelian inheritance except for those involved in the trisomic chromosome. Five loci have been assigned to a specific chromosome: Est-2 to chromosome 3, Fk-2 to chromosome 4, Prx-1 to chromosome 5, and Sod-1 and Pgd-p to chromosome 6. Nag-1 and Pgd-c displayed a linkage of 22.8 cM indicating a clear homology with chromosome 5 of garden pea on which both markers are syntenic.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00220960
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  • 17
    Electronic Resource
    Electronic Resource
    Development of a genetic composite map of Vicia faba using F2 populations derived from trisomic plants (1999)
    Springer
    Theoretical and applied genetics 98 (1999), S. 736-743 
    Details
    ISSN: 1432-2242
    Keywords: Key words Vicia faba ; Genetic map ; Trisomics ; RAPD ; Seed-protein genes ; QTLs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Seven F2 families of faba bean descendent from plants trisomic for chromosomes 3, 4, 5 and 6 were analyzed for isozyme markers and two of these were also studied for morphological and RAPD markers and seed-protein genes. Linkage analysis revealed 14 linkage groups, 8 of which were unambiguously assigned to specific chromosomes. Several QTLs for seed weight were identified, the most important of which, located on chromosome 6, explained approximately 30% of the total phenotypic variation. Comparison of results from Vicia faba with the maps of the related species Pisum sativum L. and Cicer arietinum L. revealed one possible new case of linkage conservation. A composite linkage analysis based on 42 markers analyzed in this and previous studies, where line Vf 6 was also used as the female parental, allowed the new assignment of previously independent linkage groups and/or markers to specific chromosomes. Thus, the number of linkage groups was reduced to 13, each comprising an increased number of markers. No contradictory results were detected, indicating the suitability of the statistical procedure and methodology used so far in the development of the map of this species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220051129
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  • 18
    Electronic Resource
    Electronic Resource
    Using RAPDs to study phylogenetic relationships in Rosa (1996)
    Springer
    Theoretical and applied genetics 92 (1996), S. 273-277 
    Details
    ISSN: 1432-2242
    Keywords: Rosa sp. ; RAPDs markers ; Polymerase chain reaction ; Phylogenetic relationships
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Nineteen species of rose (Rosa sp.) were analysed using Random Amplified Polymorphic DNA markers (RAPD). Each 10-base-long arbitrary primer produced a specific DNA banding pattern that grouped plants belonging to the same species and botanical sections as predicted from their genetic background. One hundred and seventy-five amplification products were examined by cluster analysis to assess the genetic relationships among species and their genetic distances. All of the accessions belonging to 1 species grouped together before branching to other species. Dendrograms constructed for intra- and inter-specific studies showed a good correlation with previous classifications by different authors based on morphological and cariological studies. Our results show that the RAPD technique is a sensitive and precise tool for genomic analysis in rose, being useful in assigning unclassified accessions to specific taxonomic groups or else allowing accessions classified by traditional criteria to be re-classified.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00223385
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  • 19
    Electronic Resource
    Electronic Resource
    Genetic mapping of new morphological, isozyme and RAPD markers in Vicia faba L. using trisomics (1996)
    Springer
    Theoretical and applied genetics 93 (1996), S. 1130-1138 
    Details
    ISSN: 1432-2242
    Keywords: Key wordsVicia faba ; Trisomic ; Isozymes ; RAPDs ; Linkage groups
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Thirteen F2 families of faba bean (Vicia faba L.), descended from plants trisomic for chromosomes 3, 4, 5 and 6, have been analyzed for morphological, isozyme and RAPD markers. This allowed the establishment of linkage relationships among these markers as well as the assignment of some markers and/or linkage groups to their respective chromosomes. The linkage analysis of partially overlapping sets of informative genetic markers for the data pooled from 13 F2 families has revealed 48 linkage groups, six of which have been precisely assigned to specific chromosomes. A statistical procedure to analyze the data of joint segregation analysis in families derived from trisomic plants has been developed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050346
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  • 20
    Electronic Resource
    Electronic Resource
    Estimation of linkage in trisomic inheritance (1998)
    Springer
    Theoretical and applied genetics 96 (1998), S. 513-518 
    Details
    ISSN: 1432-2242
    Keywords: Key words Trisomic ; Linkage ; Maximum-likelihood estimates ; Vicia faba L.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Based on F2 families derived from selfed F1 trisomic plants we have developed a genetic model to estimate linkage relationships between pairs of loci located on the extra chromosome. Genotypic frequencies of each class expected in a trisomic F2 family have been calculated and the maximum-likelihood equations for recombination-fraction estimation have been derived for a variety of genetic situations. Morton’s test of homogeneity was used to compare recombination fractions estimated between loci exhibiting trisomic segregation to those obtained in families where the same loci showed Mendelian segregation. This method has been applied to an analysis of morphological, isozyme and RAPD data from faba bean (Vicia faba L.).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050768
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