Czech Journal of Genetics and Plant Breeding, 2005 (vol. 41), issue 2
Comparative Mapping of Genes for Brittle Rachis in Triticum
Nobuyoshi Watanabe, Naoto Takesada, Yuko Fujii, Petr Martinek
Czech J. Genet. Plant Breed., 2005, 41(2):39-44 | DOI: 10.17221/3671-CJGPB 
The brittle rachis phenotype is of adaptive value in wild grass species because it causes spontaneous spike shattering. The genes on the homoeologous group 3 chromosomes determine the brittle rachis in Triticeae. A few genotypes with brittle rachis have also been found in the cultivated Triticum. Using microsatellite markers, the homoeologous genes for brittle rachis were mapped in hexaploid wheat (Triticum aestivum L.), durum wheat (Triticum turgidum L. conv. durum /Desf./) and Aegilops tauschii Coss. On chromosome 3AS, the gene for brittle rachis, Br2, was linked with the centromeric...
Resistance To Powdery Mildew In Selected Czech Winter Barley Breeding Lines
A Dreiseitl
Czech J. Genet. Plant Breed., 2005, 41(2):45-50 | DOI: 10.17221/6076-CJGPB
Powdery mildew resistances in Czech winter barley breeding lines were postulated on the basis of their reaction types to 32 pathotypes of the pathogen with different combinations of virulence genes. The results from testing 38 lines represent a substantial part of found variability in the examined trait with 13 found resistances. The resistances typical of winter barley cultivars dominated in six-row lines whereas the resistances typical of spring barley cultivars were more frequent in two-row lines. None of these resistances was effective enough to all used pathotypes. Desired effectiveness is present neither in the lines with a combination of corresponding...
Simulation and Assessment of Possible Environmental Risks Associated with Release of Genetically Modified Peas (Pisum sativum L.) into Environment in Central Europe
R. Dostálová, M. Seidenglanz, M. Griga
Czech J. Genet. Plant Breed., 2005, 41(2):51-63 | DOI: 10.17221/3672-CJGPB
Environmental risks connected with the release of genetically modified peas into the environment were studied in simulated field experiments. They included (1) an assessment of pollen transfer and the rate of natural outcrossing between commercial peas (Pisum sativum), (2) the incidence and behaviour of insects visiting pea flowers and their role as potential pollinators, and (3) the inventory of other insect taxa in pea crop (not related directly to pea reproduction organs). Field trials were established (2001-2003) with two non-GM pea cultivars differing in flower colour, seed coat colour and whole plant habit that were grown in close proximity....
Analysis of Genotype × Environment Interaction for Grain Yield in Chenopodium spp.
A Bhargava, S Shukla, D Ohri
Czech J. Genet. Plant Breed., 2005, 41(2):64-72 | DOI: 10.17221/3673-CJGPB
Twenty-seven germplasm lines of Chenopodium spp. were grown in four environments and evaluated for genotype × environment interactions and comparisons between 4 stability parameters viz. Eberhart and Russel's δi2, Shukla's si2, Wricke's Wi2 and Tai's ëi were made. Highly significant variance due to environment + (G × E) interaction indicated that genotypes interacted differentially with environments. Shukla's and Wricke's methods gave more or less the same results while large differences occurred between Shukla's and Tai's methods....
Genetic Diversity between Yacon Landraces from Different Countries Based on Random Amplified Polymorphic DNAs
L Milella, J Salava, G Martelli, I Greco, E F Cusimamani, I Viehmannová
Czech J. Genet. Plant Breed., 2005, 41(2):73-78 | DOI: 10.17221/3674-CJGPB
Random amplified polymorphic DNA (RAPD) markers are widely used for evaluating the genetic relationship of crop germplasm. Five different landraces of yacon (Smallantus sonchifolius (Poepp. and Hendl.) H. Robinson; Asteraceae) collected in various countries and showing different morphological traits were investigated using a total of 61 decamer primers. A total of 282 RAPD markers were scored and 28.7% of them were polymorphic at least within landraces. RAPD markers generated by one primer (OBP14) discriminated between all landraces. Markers were used to calculate genetic similarity coefficient and to build a dendrogram representing...
Poppy Variety Sokol (White-Seed Type)
L. Kameníková
Czech J. Genet. Plant Breed., 2005, 41(2):79-80 | DOI: 10.17221/6077-CJGPB