| Studies on the Description standard and Computerized Management of Wild Grapevine Germplasm Resources Native to ChinaPostgraduate: Ruan Shili Tutor:Prof. Li Hua(College of Enology, Northwest Sci-Tech University of Agriculture and Forestry, Yangling, Shaanxi, 712100) In this paper, we have carried out a systematic research for wild grape botanical morphological characteristic, fruit properties, phenological phases and adaption of international and domestic descriptors to wild grapevine. Computer information management system of wild grapevine resources is specially studied, using about 180 wild clones from 19 different countrysides, 54 villages of Yunxi, Hu Bei province. The color of wild grapevines' different organs (including shoot tip, young leaf, mature leaf, vein, node, internode and fruit) varied greatly. Its types differ in grape species, organs and growing phases, and also can be classified basically to 23 strains. Present descriptors couldn't adapt to the practicality of wild species, so we suggest that color properties be plotted systematically, uniformly coded and chromatogram be established, so as to facilitate the study of wild grapevine native to China. The differences of floss characteristic growing on organs' surface is also distinct. There have 11 kinds of floss for wild species. Present descriptors must be revised in order to adapt the nature of wild grapevine. We proposed that initial floss description items (erect hair, prostrate hair) could be emended to floss type and floss distribution intensity, and enneametric systematics is recommended to describe the latter item according to IBPGR descriptors.Tendril forfication also vary obviously with different wild grapevine. There have two forfication types for wild grapevine in Yunxi, one of them called "once forfication" (Y model), another called "secondary forfication" (only one of first forfication ongoing second divarication).Wild grapevines whose Tendril forfication type belong to the former have: V. pseudorticulata W.T. Wang, V. piasaezkii Maxzim.;while those type belong to the latter have: V. Quinquanularis Rehd, V. ficifolia Bunge and V. romaneti Roman.. And tendril forfication type is recommended be added to the present descriptors.Among the grapevine description character, color of shoot tip(OIV 002,003),tendrils distribution type,changing of leaf type,hair on lower surface of mature leaf(OIV 084,085),size of mature leaf(OIV 065),hair on shoot tip(OIV 004,005),basic shape of teeth, bunch density(OIV 204) are very important in wild grapevine taxonomy native to Yunxi.Hair on petiole, tendrils length(OIV 017),leaf shape(OIV 067),number of lobes(OIV 068),petiole length(OIV 092) have less important taxonomy value. The mature leaf architecture properties can be used to distinguish different wild grapevine. Twenty-seven leaf architecture variables can be classified to three sorts by using principal component analysis. Among them, 15 variables can be used to efficient indexes for wild grapevine classification and identification, and also for the basis of wild grapevine discrimination.Basing on existing descriptors of grapevine resources and actual instance of Yunxi, we put forward a standard for recording and description suited to wild grapevine native to Yunxi.Wild Grapevine Resources Information Management System (WGRIMS) of Yunxi is accidencely established using Visual FoxPro 6.0 as tools and Windows 98 as platform, basing on the international and domestic descriptors and the practicality of wild grapevine. The database has 10 subschema including fields description database, basis information(passport information)database, shoot and tendrils database, young leaf database, mature leaf database, leaf architecture database, inflorescence and fruit database, seed information database, phenological phases database, adversity resistances database. Consumers can carry out database structure maintenance, data browsing, storing, amending, editing, inquiring, printing,... |
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