Template-Type: ReDIF-Article 1.0 Author-Name: P. Bartoš Author-Workplace-Name: Division of Genetics and Plant Breeding and Division of Molecular Genetics, Department of Applied Genetics, Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Author-Name: J. Ovesná Author-Workplace-Name: Division of Genetics and Plant Breeding and Division of Molecular Genetics, Department of Applied Genetics, Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Author-Name: A. Hanzalová Author-Workplace-Name: Division of Genetics and Plant Breeding and Division of Molecular Genetics, Department of Applied Genetics, Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Author-Name: J. Chrpová Author-Workplace-Name: Division of Genetics and Plant Breeding and Division of Molecular Genetics, Department of Applied Genetics, Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Author-Name: V. Dumalasová Author-Workplace-Name: Division of Genetics and Plant Breeding and Division of Molecular Genetics, Department of Applied Genetics, Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Author-Name: M. Škorpík Author-Workplace-Name: Division of Genetics and Plant Breeding and Division of Molecular Genetics, Department of Applied Genetics, Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Author-Name: V. Šíp Author-Workplace-Name: Division of Genetics and Plant Breeding and Division of Molecular Genetics, Department of Applied Genetics, Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Title: Presence of a Translocation from Aegilops ventricosa in Wheat Cultivars Registered in the Czech Republic Abstract: The presence of a translocation from Aegilops ventricosa carrying the genes for rust resistance Yr17, Lr37 and Sr38 was analysed in recently registered, mostly western European wheat cultivars in the Czech Republic. By means of a PCR marker the presence of the translocation was determined in cvs. Bill, Clarus, Clever, Corsaire, Rapsodia, and in the Czech cv. Rheia. Novel are the data for cvs. Rapsodia, Clarus and Rheia. Infection tests indicated the presence of additional leaf rust resistance genes in cultivars with the translocation, except in cv. Rheia. Segregating progenies of six crosses between cv. Renan possessing Lr37and different cultivars susceptible to leaf rust were tested for the presence of the translocation with Yr17, Lr37 and Sr38 by an infection test as well as by a molecular marker. High coincidence between the results from infection tests and those by the marker has been proved. Keywords: winter wheat, Aegilops ventricosa, translocation, registered cultivars, Lr37, leaf rust resistance, molecular marker Journal: Czech Journal of Genetics and Plant Breeding Pages: 31-35 Volume: 40 Issue: 2 Year: 2004 DOI: 10.17221/3697-CJGPB File-URL: http://cjgpb.agriculturejournals.cz/doi/10.17221/3697-CJGPB.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjg-200402-0001.txt Handle: RePEc:caa:jnlcjg:v:40:y:2004:i:2:id:3697-CJGPB Template-Type: ReDIF-Article 1.0 Author-Name: K. Pánková Author-Workplace-Name: Division of Genetics and Plant Breeding, Department of Applied Genetics, Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Author-Name: J. Košner Author-Workplace-Name: Division of Genetics and Plant Breeding, Department of Applied Genetics, Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Title: Chromosome Substitutions with Dominant Loci Vrn-1 and their Effect on Developmental Stages of Wheat Abstract: Wheat substitution lines which change winter to spring growth habit were obtained due to substitutions of homoeologous group 5 chromosomes carrying dominant genes Vrn-A1, Vrn-B1 and Vrn-D1 into the genetic backgrounds of the winter varieties Zdar (sensitive to photoperiod) and Košutka (insensitive to photoperiod), and thus replacing the recessive alleles vrn-A1, vrn-B1, vrn-D1 by dominant alleles. The influence of the substituted chromosomes carrying individual loci Vrn on developmental stages of wheat was studied. The verified donor wheat varieties of dominant Vrn loci were: Zlatka (Vrn-A1, chromosome 5A), Česká Přesívka (Vrn-B1, chromosome 5B), and Chinese Spring (Vrn-D1, chromosome 5D). The six substitution lines were sown in the field on 10 subsequent dates and their developmental stages were checked to study the effect of the substitutions on development. The lines were also grown under short day conditions (10 hours) to evaluate their photoperiod sensitivity. The analysis of results confirmed the marked effect of chromosome 5A carrying the Vrn-A1 locus on duration of the developmental stages, besides the influence of sowing date and genetic background. The most shortening effect on growth stages was observed in the lines with substitutions of chromosome 5A (Vrn-A1) while the least reduction was in the lines with the substituted chromosome 5B (Vrn-B1). The largest difference in heading time, 6.5 days, occurred between the lines with chromosome substitutions carrying Vrn-A1 and Vrn-B1 loci. The effect of substitutions with Vrn-D1 was intermediate. Keywords: Triticum aestivum, wheat, Vrn, growth habit, growth stages Journal: Czech Journal of Genetics and Plant Breeding Pages: 37-44 Volume: 40 Issue: 2 Year: 2004 DOI: 10.17221/3698-CJGPB File-URL: http://cjgpb.agriculturejournals.cz/doi/10.17221/3698-CJGPB.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjg-200402-0002.txt Handle: RePEc:caa:jnlcjg:v:40:y:2004:i:2:id:3698-CJGPB Template-Type: ReDIF-Article 1.0 Author-Name: B.R. Baum Author-Workplace-Name: Agriculture & Agri-Food Canada, Eastern Cereal and Oilseed Centre, Ottawa, Ontario, Canada Author-Name: D.J. Johnson Author-Workplace-Name: Agriculture & Agri-Food Canada, Eastern Cereal and Oilseed Centre, Ottawa, Ontario, Canada Title: Differences Between South American H Haplome Diploids and I Haplome Diploids from the Perspective of the 5S rDNA Gene in the Genus Hordeum Abstract: Twelve South American diploid Hordeum species belonging to the H genome and three diploid species belonging to the I genome (including cultivated barley) were investigated for their 5S rDNA sequence diversity. The 374 sequenced clones were assigned to classes called "unit classes" which were further assigned to haplomes. Two unit classes were found to be present in each haplome. These were labelled to reflect the haplomes, viz. the long H1 and short I1 unit classes for the I haplome diploids, and the long H2 and long Y2 unit classes for the South American H genome diploids. The aligned sequences were subjected to a series of Maximum Likelihood analyses and various tests, including molecular clock, which are presented and discussed. The divergences among the unit classes suggest that the genus Hordeum might be of paleopolyploid origin. Keywords: 5S DNA gene, molecular clock, paleopolyploid Journal: Czech Journal of Genetics and Plant Breeding Pages: 45-50 Volume: 40 Issue: 2 Year: 2004 DOI: 10.17221/3699-CJGPB File-URL: http://cjgpb.agriculturejournals.cz/doi/10.17221/3699-CJGPB.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjg-200402-0003.txt Handle: RePEc:caa:jnlcjg:v:40:y:2004:i:2:id:3699-CJGPB Template-Type: ReDIF-Article 1.0 Author-Name: V. Paganová Author-Workplace-Name: Department of Biotechnics of Verdure, Slovak Agricultural University in Nitra, Nitra, Slovak Republic Title: Analysis of Inheritance and Growth of Curly Birch Progenies from Controlled Hybridisation and Possibilities of their Utilisation for Timber Production in Agricultural Landscape Abstract: The influence of habit form on progeny growth was studied within the evaluation of the height growth of curly birch hybrid progenies. In all years 1998, 1999 and 2001 statistically significant differences in height were found between progenies in dependence on the hybrid combination of their parents. A large variability of heights was recorded in particular hybrid combinations nearly in all evaluated years. The effect of distant hybridisation can occur within the combination of the parents with different habit forms and their progenies reach excellent growth rate. The qualitative characteristics - rhytidome colour, occurrence of curly grain (decorative timber) on the trunk and branches and habit form were evaluated in 2001. The results confirmed statistical significance of the relationship between hybrid combination and occurrence of the studied qualitative characteristics in their progeny. The curly grain on trunk was found in all evaluated progenies, in four of them the ratio of individuals with curly grain and individuals without it was 2:1, in one progeny it was in 1:1. The proportion of birches with decorative timber will possibly increase because especially fine types of curly grain can be correctly identified at higher age. Keywords: curly birch, crossing, decorative timber, hybridisation, inheritance, timber production Journal: Czech Journal of Genetics and Plant Breeding Pages: 51-62 Volume: 40 Issue: 2 Year: 2004 DOI: 10.17221/3700-CJGPB File-URL: http://cjgpb.agriculturejournals.cz/doi/10.17221/3700-CJGPB.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjg-200402-0004.txt Handle: RePEc:caa:jnlcjg:v:40:y:2004:i:2:id:3700-CJGPB Template-Type: ReDIF-Article 1.0 Author-Name: J.C. Zadoks Author-Workplace-Name: J C. ZADOKS Title: A Plant Pathologist on Wheat Breeding with Special Reference to Septoria Diseases Abstract: This review has a personal, plant pathologist's outlook on plant breeding. It touches upon some generalities, among which the "three stages" of plant breeding, participatory plant breeding and biotechnology in plant breeding. It delves deep into modern molecular studies on leaf blotch (anamorph Septoria tritici) and glume blotch (anamorph Septoria nodorum) of wheat. Epidemiological knowledge of the teleomorphs Mycosphaerella graminicola and Stagonospora nodorum has progressed with great strides. Consequences for applied plant breeding slowly become visible. Keywords: glume blotch, leaf blotch, molecular epidemiology, Mycosphaerella graminicola, Septoria nodorum, Septoria tritici, Stagonospora nodorum Journal: Czech Journal of Genetics and Plant Breeding Pages: 63-71 Volume: 40 Issue: 2 Year: 2004 DOI: 10.17221/3701-CJGPB File-URL: http://cjgpb.agriculturejournals.cz/doi/10.17221/3701-CJGPB.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjg-200402-0005.txt Handle: RePEc:caa:jnlcjg:v:40:y:2004:i:2:id:3701-CJGPB Template-Type: ReDIF-Article 1.0 Author-Name: J. Hartmann Title: Prof. RTDr. Ing. Jan Rod, DrSc Journal: Czech Journal of Genetics and Plant Breeding Pages: 72 Volume: 40 Issue: 2 Year: 2004 DOI: 10.17221/6091-CJGPB File-URL: http://cjgpb.agriculturejournals.cz/doi/10.17221/6091-CJGPB.html File-Format: text/html Handle: RePEc:caa:jnlcjg:v:40:y:2004:i:2:id:6091-CJGPB