Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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    Report of ad hoc meeting of the Chairs, Vice-Chairs and Central Crop Database Managers of the ECPGR Solanaceae and Cucurbits Working Groups
    Díez Niclós, M.J. ; Valcárcel, J.V. ; Íñigo, A.G. ; Dooijeweert, W. van; Menting, F. ; Weerden, G. van der; Daunay, M. - \ 2013
    Valencia, Spain : ECPGR - 5
    genenbanken - databanken - solanaceae - cucurbitaceae - werkgroepen - gene banks - databases - solanaceae - cucurbitaceae - working groups
    The scope of this two-day ad hoc meeting was to explore the possibility to abandon Central Crop Databases (CCDBs) and focus on EURISCO, in order to avoid duplication of data and working efforts. The main facilities of both systems were discussed. Current progress concerning the selection of Most Appropriate Accessions (MAAs) was reviewed for Solanaceae and Cucurbits and possible plans for the new phase of ECPGR (Phase IX, 2014-2018) were discussed.
    A new tetraploid species of Solanum section Solanum (Solanaceae) from Tanzania
    Manoko, M.L.K. ; Weerden, van der, G.M. ; Berg, van den, R.G. ; Mariani, C. - \ 2012
    Phytokeys 16 (2012). - ISSN 1314-2011 - p. 65 - 74.
    Solanum umalilaense Manoko sp. nov. (Solanaceae) is described from the Umalila area, in the southern highlands of Tanzania. Its novelty is supported with both morphological and AFLP data. Phenetic and phylogenetic analyses place Solanum umalilaense as a unique and well-supported taxon among tetraploid species of Solanum sect. Solanum from Africa. It can be distinguished from other African species by its extremely developed branching, each branch producing many multi-flowered inflorescences, flowers with short calyx lobes and its persistent, small, light yellowish brown fruits
    Role of Solanum dulcamara L. in Potato Late Blight Epidemiology
    Golas, T.M. ; Weerden, G.M. van der; Berg, R.G. van den; Mariani, C. ; Allefs, J.J.H.M. - \ 2010
    Potato Research 53 (2010)1. - ISSN 0014-3065 - p. 69 - 81.
    infestans mont debary - nevado-de-toluca - phytophthora-infestans - natural occurrence - solanaceous hosts - western slopes - resistance - plant - inoculation - strains
    Four sites with naturally growing Solanum dulcamara were surveyed during 2006 and 2007 for the presence of late blight. Despite 2 years of observations, no late blight was detected among natural populations of bittersweet. Nevertheless, repeated infections occurred on few S. dulcamara plants from a collection growing in a botanical garden in the same years. These plants were used to investigate the possibility of survival of the inoculum between seasons. In the respective years, a set of 21 and 52 S. dulcamara accessions inoculated with Phytophthora infestans under field conditions resulted in a wide range of responses to the disease. More susceptible reactions were found among genotypes collected at greater distance from commercial potato fields indicating the possibility of genetic selection caused by P. infestans. However, both scarceness of natural infections and no overwintering, suggest that bittersweet may not play a role in late blight epidemiology
    Identification of a resistance gene Rpi-dlc1 to Phytophthora infestans in European accessions of Solanum dulcamara
    Golas, T.M. ; Sikkema, A. ; Gros, J. ; Feron, R.M.C. ; Berg, R.G. van den; Weerden, G.M. van der; Mariani, C. ; Allefs, J.J.H.M. - \ 2010
    Theoretical and Applied Genetics 120 (2010)4. - ISSN 0040-5752 - p. 797 - 808.
    late-blight resistance - broad-spectrum resistance - race-specific resistance - potato late blight - r-gene - disease-resistance - chromosome-ix - bulbocastanum - tomato - locus
    Initial screening of 14 Solanum dulcamara accessions enabled the identification of individuals resistant and susceptible to Phytophthora infestans. Crosses between contrasting genotypes resulted in three F2–BC1 populations segregating for resistance to late blight in a laboratory assay and under field conditions. Genetic profiling of one of these populations using 128 AFLP primers generated three markers linked to the resistant phenotype. Blast analysis of the sequenced markers resulted in a plausible gene position on the distal end of the long arm of chromosome 9 that could be confirmed by CAPS markers. Thus, we describe a first resistant gene, named Rpi-dlc1, from S. dulcamara, a Solanum species native to Europe. In addition, one population was tested for broadness of resistance responses using a set of seven additional P. infestans isolates, varying in virulence. This indicated the possible presence of additional Rpi genes.
    Genetic structure of European accessions of Solanum dulcamara L. (Solanaceae)
    Golas, T.M. ; Feron, R.M.C. ; Berg, R.G. van den; Weerden, G.M. van der; Mariani, C. ; Allefs, J.J.H.M. - \ 2010
    Plant Systematics and Evolution 285 (2010)1-2. - ISSN 0378-2697 - p. 103 - 110.
    phytophthora-infestans - aflp - populations - nigrum
    Solanum dulcamara (bittersweet) is one of the few native species of Solanum present in Europe. It is a common weed that occupies a wide range of habitats and is often found in the direct vicinity of cultivated potatoes (Solanum tuberosum), where it could transmit diseases. A broad sampling of European S. dulcamara accessions was carried out to gain insight into the population structure and crossing preferences of this species. Three amplified fragment length polymorphism (AFLP®) primer combinations generating 288 polymorphic fragments were used to analyze 79 bittersweet accessions (245 individuals). Dendrograms revealed a low level of genetic polymorphism in the bittersweet populations, caused partially by the out-crossing nature of this species
    Genetic diversity of the African hexaploid species Solanum scabrum Mill. and S. nigrum L. (Solanaceae)
    Manoko, M.L.K. ; Berg, R.G. van den; Feron, R.M.C. ; Weerden, G.M. van der; Mariani, C. - \ 2008
    Genetic Resources and Crop Evolution 55 (2008)3. - ISSN 0925-9864 - p. 409 - 418.
    fragment length polymorphism - aflp analysis - wild relatives
    Two hexaploid species of Solanum sect. Solanum are present in Africa: Solanum scabrum and S. nigrum. Solanum scabrum is a widely cultivated species and is used as a leafy vegetable, as a source of medicine and as a source of ink dye. In previous studies a wide range of morphological diversity has been reported in this species and in some studies subspecies have been proposed. Subspecies are also recognized in S. nigrum. However, it has not been established whether or not the morphological differences are reflected at the genomic level. The present study applies AFLPs to study the genetic diversity in S. scabrum and its relationship to geographical provenance, morphological differences and the possible existence of subspecies within S. scabrum and S. nigrum. The data obtained were analyzed with cluster analysis (using UPGMA and NJ). The results indicate that the genetic variation within S. scabrum was higher within accessions than between accessions. Accessions did not cluster according to their geographical provenance, indicating that accessions from different geographical areas were not significantly different genetically. The clustering reflected neither morphological differences nor domestication status (cultivated or wild). The morphological differences exhibited by S. scabrum could be due to selection by farmers for different plant types. The AFLP derived clustering pattern did not segregate the subspecies recognized in S. scabrum and S. nigrum into separate subclusters.
    AFLP markers support separation of Solanum nodiflorum from Solanum americanum sensu strictio (Solanaceae)
    Manoko, M.L.K. ; Berg, R.G. van den; Feron, R.M.C. ; Weerden, G.M. van der; Mariani, C. - \ 2007
    Plant Systematics and Evolution 267 (2007)1-4. - ISSN 0378-2697 - p. 1 - 11.
    genetic-relationships - l. - biosystematics - relatives - homology - barley - wild
    This study was aimed at examining the relationships between the African material of Solanum americanum (also designated as S. nodiflorum), accessions of this taxon from other geographical areas, and American S. americanum using AFLP markers. 96 individuals representing 39 accessions of S. americanum sensu lato and related diploid species from the widest possible geographical range, and one accession of S. dulcamara (as outgroup) were used. The AFLP results suggested that American S. americanum differs from S. nodiflorum and that the material investigated in this study can be assigned to three different species: S. americanum sensu stricto, S. nodiflorum and a Solanum species from Brazil. These species can be differentiated based on a combination of floral and fruit characteristics.
    Molecular systematics of Solanum series Circaeifolia using AFLP and RAPD markers
    Berg, R.G. van den; Groendijk-Wilders, N. ; Zevenbergen, M.J. ; Spooner, D.M. - \ 2001
    In: Solanaceae V: Advances in taxonomy and utilization : Vth International Solanaceae Conference, Nijmegen, 23-29 July 2000 / van den Berg, R.G., Barendse, G.W.M., van der Weerden, G.M., Mariani, C., Nijmegen : Nijmegen University Press - p. 73 - 84.
    Quantitative assessment of corolla shape variation in Mexican Solanum sect. Petota
    Spooner, D.M. ; Berg, R.G. van den - \ 2001
    In: Solanaceae V: Advances in taxonomy and utilization : Vth International Solanaceae Conference, Nijmegen, 23-29 July 2000 / R.G. van den Berg, G.W.M. Barendse, G.M. van der Weerden and C. Mariani. - Nijmegen : Nijmegen University Press, 2001 - p. 61 - 71.
    Solanaceae V: Advances in taxonomy and utilization : Proceedings of the Vth International Solanaceae Conference
    Berg, R.G. van den; Barendse, G.W.M. ; Weerden, G.M. van der; Mariani, C. - \ 2001
    Nijmegen : Nijmegen University Press - ISBN 9789037305807 - 442
    solanaceae - taxonomie - plantengeografie - agronomie - plantenveredeling - classificatie - solanaceae - taxonomy - classification - phytogeography - agronomy - plant breeding
    Unexpected interactions of the tomato fungal pathogen Alternaria arborescens with Nicotiana species from germplasm repositories
    Brandwagt, B.F. ; Kneppers, T.J.A. ; Weerden, G.M. van der; Nijkamp, H.J.J. ; Hille, J. - \ 2000
    In: Abstracts Fifth International Solanaceae Conference, Nijmegen, 23-29 July 2000. - Nijmegen : Botanical Garden of the University of Nijmegen, 2000 - p. 17 - 17.
    Nutritional implications of L-arabinose in pigs
    Schutte, J.B. ; Jong, J. de; Weerden, E.J. van; Tamminga, S. - \ 1992
    The British journal of nutrition 68 (1992)1. - ISSN 0007-1145 - p. 195 - 207.
    Nutritional value and physiological effects of D-xylose and L-arabinose in poultry and pigs
    Schutte, J.B. - \ 1991
    Agricultural University. Promotor(en): M.W.A. Verstegen; S. Tamminga; E.J. van Weerden. - S.l. : Schutte - 173
    voer - voedingswaarde - pluimvee - kippen - varkens - monosacchariden - feeds - nutritive value - poultry - fowls - pigs - monosaccharides

    The main sugars other than glucose, which will be released from a hydrolysis of nonstarch polysaccharides, are D-xylose and L-arabinose. The results of studies on the fate of both pentose sugars after oral administration in poultry and pigs are presented. Digestibility of L-arabinose at the end of the ileum was found to be lower than that of D-xylose. The presence of D-xylose or L-arabinose in the diet increased the ileal flow of volatile fatty acids in pigs, suggesting microbial degradation of both sugars in the small intestine. Both pentose sugars were partly excreted in the urine. The extent of this urinary excretion, as a percentage of intake, increased as the dietary inclusion of either of the two sugars was increased. At equal dietary levels, more xylose than arabinose was excreted in the urine. Feeding of D-xylose and L-arabinose to pigs and poultry caused some physiological changes. In chicks these changes resulted in wet droppings. The net energy value of both pentose sugars was calculated to be approximately 25 to 35% of that of D-glucose.

    Effects of pST in nutrient requirements of pigs.
    Fentener van Vlissingen, M. ; Weerden, E.J. van; Verstegen, M.W.A. - \ 1991
    In: Proc. Int. Symp. Biotechnology for control and product quality in meat production: implications and acceptability, P. van der Wal et al. (eds.). Washington DC, 1990. Pudoc, Wageningen - p. 131 - 141.
    Effect of rPST treatment on N gain in pigs at various protein and energy intake levels.
    Weerden, E.J. van; Verstegen, M.W.A. ; Fentener van Vlissingen, J.M. ; Hel, W. van der; Kanis, E. ; Wal, P. van der - \ 1990
    Journal of Animal Science 68 (1990)suppl. 1. - ISSN 0021-8812 - p. 275 - 275.
    Effect of exogenous porcine somatotropin administration on nitrogen and energy metabolism in three genotypes of pigs.
    Verstegen, M.W.A. ; Hel, W. van der; Henken, A.M. ; Huisman, J. ; Kanis, E. ; Wal, P. van der; Weerden, E.J. van - \ 1990
    Journal of Animal Science 68 (1990). - ISSN 0021-8812 - p. 1008 - 1016.
    Antinutritional factors (ANF) in pig nutrition.
    Huisman, J. ; Poel, A.F.B. van der; Verstegen, M.W.A. ; Weerden, E.J. van - \ 1990
    World review of animal production 25 (1990). - ISSN 0043-8979 - p. 77 - 82.
    Effect of variable protein contents in diets containing Phaseolus vulgaris beans on performance, organ weights and blood variables in piglets, rats and chickens
    Huisman, J. ; Poel, A.F.B. van der; Mouwen, J.M.V.M. ; Weerden, E.J. van; Kik, M.J.L. - \ 1990
    The British journal of nutrition 64 (1990)3. - ISSN 0007-1145 - p. 755 - 764.
    Effect of pST treatment on N-gain in pigs at various protein and energy intake levels.
    Weerden, E.J. van; Verstegen, M.W.A. ; Fentener van Vlissingen, J.M. ; Hel, W. van der; Kanis, E. ; Wal, P. van der - \ 1990
    In: ASAS 68 suppl. 1 - p. 275 - 275.
    Effect of PST treatment on N gain at various protein and energy intake levels.
    Weerden, E.J. van; Verstegen, M.W.A. ; Fentener van Vlissingen, J.M. ; Hel, W. van der; Kanis, E. ; Wal, P. van der - \ 1990
    Journal of Animal Science 68 (1990)suppl. 1. - ISSN 0021-8812 - p. 275 - 275.
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