Schriften zu Genetischen Ressourcen - Genres
Schriften zu Genetischen Ressourcen - Genres Schriften zu Genetischen Ressourcen - Genres
A.C. ZEVEN • Many fruits are depicted. They may have been harvested from single standing volunteer trees, which remained after negative mass selection (man will have removed ‘disliked’ trees) or from orchards with grafts after positive mass selection (obtained from ‘liked’ trees). • Bearded and beardless wheat ears have been painted. The latter type look similar to those of the landrace ‘Zeeuwse Witte’ (Zeeland White). • Although kale has been depicted and described in herbals this crop is not painted. I have no explanation for this. • Jan van de Groen described in the 17 th century in his book De Hovenier, six types of lettuce. On paintings we find only two types. This author described only one carrot form, whereas on paintings several are depicted. This indicates that paintings and early descriptions complement each other. Final conclusion Paintings with vegetables, some arable crops and many ornamental plants depicted, form a rich source for the study of the evolution of cultivated crops. References ZEVEN, A.C. and G.J. STEMERDINK (1986): A cluster analysis of eight mediaeval manuscripts based on depicted plant taxa. - Journ. d’Agric. et Bot. Appl. 33, 225-241. ZEVEN, A.C. and W.A. BRANDENBURG (1986): Use of paintings from the 16 th to 18 th centuries to study the history of domesticated plants. - Economic Botany 40, 397-408. [Also published as: Gemälde alter flämischer und holländischer Meister als Wegweiser des Werdegangs unserer Kulturpflanzen. - Veröff. Landw.-Chem. Bundesanstalt Linz: 19 (1988) 13-21.] ZEVEN, A.C. (1996): Sixteenth to eighteenth century depictions of cole crops (Brassica oleracea L.), turnips (B. rapa L. cultivar group Vegetable turnips) and radish (Raphanus sativus L.) from Flanders and the present-day Netherlands. Proc. Intern. Symp. on Brassica/Ninth Crucifer Genetics Workshop 407, pp. 29-33. [Also published in Tendencias Actuales en Genetica-1996, pp. 73-77.] 169
Sugar beets and related wild species – from collecting to utilisation Sugar beets and related wild species – from collecting to utilisation L. FRESE 1 Abstract During the past two decades the interest in collecting and safeguarding Beta germplasm has increased continuously. A new taxonomic system accepted by the largest user group, the World Beta Network, is reported and commented here. Aspects of ex situ management of Beta germplasm holdings are described and the threat of genetic erosion in Beta ex situ as well as in situ is discussed. The establishment and improvement of information systems and a core collection for Beta facilitate users’ access to collections, today. Since mid of the 1980s researchers are screening collections mainly in order to detect disease resistance. The total amount of disease evaluation data recorded by GRIN and the IDBB is close to 7,400 data. Useful accessions have been found and resistance traits are being introgressed or incorporated into the sugar beet breeding pool. Introduction Cultivated beets are used for vegetable (leaf, petiole, root), forage and sugar production. With a total world-wide production area of 6.96 million hectare in 1998 (HOLTSCHULTE 2000), the sugar beet is the most important crop amongst the cultivated forms. Many beet pests and diseases are known (ANONYMOUS 1995); one of the most important sugar beet disease is the leaf spot (Cercospora beticola) affecting more than a third of all sugar beet fields world-wide (HOLTSCHULTE 2000). It can easily be understood that the development and continued improvement of resistant cultivars is of great importance to all sugar beet producing countries. The growing demand for an environmentally sound agricultural production also promoted the search for accessions with novel genes for disease resistance. In addition to disease resistance, tolerance to abiotic stress receives increasing attention. On the background of the forecasted global climatic change it seems to be prudent to start screening for drought tolerance in Beta already today. Higher tolerance to salt stress plays a role in arid production areas. In particular wild beets growing along the sea shores are known for their natural salt tolerance. Research 1 Federal Centre for Breeding Research on Cultivated Plants (BAZ) Gene Bank Bundesallee 50 D-38116 Braunschweig, Germany 170
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A.C. ZEVEN<br />
• Many fruits are depicted. They may have been harvested from single standing volunteer<br />
trees, which remained after negative mass selection (man will have removed ‘disliked’<br />
trees) or from orchards with grafts after positive mass selection (obtained from ‘liked’<br />
trees).<br />
• Bearded and beardless wheat ears have been painted. The latter type look similar to<br />
those of the landrace ‘Zeeuwse Witte’ (Zeeland White).<br />
• Although kale has been depicted and described in herbals this crop is not painted. I<br />
have no explanation for this.<br />
• Jan van de Groen described in the 17 th century in his book De Hovenier, six types of<br />
lettuce. On paintings we find only two types. This author described only one carrot form,<br />
whereas on paintings several are depicted. This indicates that paintings and early descriptions<br />
complement each other.<br />
Final conclusion<br />
Paintings with vegetables, some arable crops and many ornamental plants depicted, form<br />
a rich source for the study of the evolution of cultivated crops.<br />
References<br />
ZEVEN, A.C. and G.J. STEMERDINK (1986): A cluster analysis of eight mediaeval manuscripts<br />
based on depicted plant taxa. - Journ. d’Agric. et Bot. Appl. 33, 225-241.<br />
ZEVEN, A.C. and W.A. BRANDENBURG (1986): Use of paintings from the 16 th to 18 th centuries<br />
to study the history of domesticated plants. - Economic Botany 40, 397-408. [Also<br />
published as: Gemälde alter flämischer und holländischer Meister als Wegweiser des<br />
Werdegangs unserer Kulturpflanzen. - Veröff. Landw.-Chem. Bundesanstalt Linz: 19<br />
(1988) 13-21.]<br />
ZEVEN, A.C. (1996): Sixteenth to eighteenth century depictions of cole crops (Brassica<br />
oleracea L.), turnips (B. rapa L. cultivar group Vegetable turnips) and radish (Raphanus<br />
sativus L.) from Flanders and the present-day Netherlands. Proc. Intern. Symp.<br />
on Brassica/Ninth Crucifer Genetics Workshop 407, pp. 29-33. [Also published in<br />
Tendencias Actuales en Genetica-1996, pp. 73-77.]<br />
169