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Wheat cultivars carrying the 1BL.1RStranslocation were crossed with newly synthesised octoploid triticale lines involving four rye genotypes having ο-secalin banding patterns different from each other and from that of the 1BL.1RS translocation. Homologous recombination was expected between the short arm of the 1R chromosomes of the rye genotypes and the 1RS arm of the 1BL.1RSwheat/rye translocation...
Disease symptoms and total soluble phenolics content have been analysed in four sunflower (Helianthus annuus L.)lines with different resistance levels(from highly susceptible to resistant) to head rot caused by Sclerotinia sclerotiorum (Lib.) de Bary. At the beginning of the flowering stage, capitula were inoculated by spraying with a water suspension of ascospores, and disease symptoms were evaluated...
The characterization of diversity in germplasm collections is important to plant breeders for crop improvement and to genebank curators for efficient and effective management of collection. The objective of our study was to describe the phenotypic diversity of the 16 820accessions of chickpea (Cicerarietinum L.) germplasm contained in the ICRISAT genebank. The germplasm accessions were characterized...
Somaclones (R2, R3 and R4generations) were regenerated from immature embryos of two spring wheat varieties,HUW-206 and HUW-234. Many somaclones displayed improved earliness, enhanced resistance to spot blotch disease and increased yield over the parent. The superiority of variants for yield traits and disease resistance was established in R4 generation, confirming the possibility of wheat improvement...
By analysing a number (20–38) of individuals from selected varieties of wheat and tomato, we have been able to assess intra-varietal uniformity at certain micro satellite (simple sequence repeat, SSR) loci. In total, 45 varieties of wheat were analysed at between 7–9 different SSR loci, and 10 varieties of tomato were analysed at six loci. The results showed that there was variation both between varieties...
Genotypic variations and correlations were estimated for sugar and acid contents on afresh flesh weight basis in peach and nectarine genotypes derived from a clone of a wild peach (Prunus davidiana) by three generations of crosses with commercial nectarine varieties. 107genotypes were studied in Avignon (France), 40 in Gotheron (France), and 18 of them were common to both locations. Considerable variations...
To find out gene dose effect of each of the three homoeologous Wx genes and their interaction on the production of granule-bound starch synthase (GBSS I) and amylose biosynthesis in the endosperm, Chinese Spring and its near-isogenic waxy types were crossed reciprocally and, obtained a plant population with varying doses of each Wx gene. The amount of GBSSI was increased linearly with increasing gene...
Androgenetic response and its inheritance was studied in nine winter type and two spring type wheat genotypes by crossing them in line × tester fashion. The 18 F1 and 11 parental genotypes were raised in completely randomized block design with three replications and subjected to anther culture. Data were recorded with respect to per cent calli induction, percent regeneration and per cent green plant...
The genus Pistacia (Anacardiaceae) includes 11 species divided into four sections, according to leaf characters and nut morphology. Recently two monophyletic groups have been proposed by using cpDNA,Lentiscus and Terebinthus,containing evergreen and deciduous species, respectively. In the present work molecular markers, derived from two different methods, RAPD and AFLP, are used to study the relationships...
Microsatellite markers were used to characterize 35 banana (Musa spp.)genotypes cultivated in Brazil, including triploid cultivars and tetraploid hybrids. A total of 33 Musa-specific primers were tested, and 11 produced clear ,reproducible and discrete bands. The average number of alleles amplified per primer was 6.1, ranging from 4 to 8, with a total of 67 alleles identified. Phenetic analysis based...
The wild tuber-bearing Solanumspecies represent a genetic pool of enormous diversity, embracing high variability for many agronomic traits. S. kurtzianum (ktz), S. chacoense(chc) and S. ruiz-lealii (rzl) are wild diploid self-incompatible relatives of the common potato, Solanum tuberosumssp. tuberosum, with resistance to adverse biotic and abiotic factors. Pollen-pistil/style compatibility relations...
World production of macadamia nuts is based on two species, the smooth shell Macadamia integrifolia Maiden and Betche, and the rough shell Macadamiatetraphylla L.A.S. Johnson, and their hybrids. One hundred and five AFLP markers were used to analyze 26 macadamia accessions representing four species: M. integrifolia, M. tetraphylla,M. ternifolia, and M. hildebrandii as well as a wild relative,Hicksbeachia pinnatifolia...
Yield and its components (stem-, leaf- and top-yield) were analyzed in a population derived from the cross between F1.1 andF1.7 entries of Miscanthus sinensisAnders. Both lines are offspring of the cross between MS-90-2 and MS-88-110. The aim of this work was to identify QTLs for yield and its components suitable to develop a Marker Aided Selection (MAS) program in M. sinensis.QTL analyses were performed...
In this study, we report the use of ISSR to assess genetic diversity and to determine the relationships among ten cultivars of common bean developed in Argentina and three materials from France. ISSR markers resolved two major groups corresponding to the Andean and Mesoamerican gene pools of common bean. We compared the results of previous analysis, performed with RAPD markers (Galván et al., 2001),...
An on-station experiment was carried out in northern Namibia to compare local landraces of watermelon to modern varieties. Three groups of local watermelon are distinguished by farmers in Namibia: watermelons for fresh consumption, cooking melons used for porridge, and seed melons for oil pressing. The present study was carried out to estimate agronomic potential of the local landraces and verify...
In this study, the inheritance of resistance to Beet necrotic yellow vein virus (BNYVV) in accessions Holly-1-4and WB42 was investigated. Crosses between both resistant sources and susceptible parents were carried out and F1F2 and BC1 populations were obtained. Virus concentrations in WB42and its F1 populations were lower than in Holly-1-4. Observed ratios of susceptible and resistant plants in segregating...
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