conference schedule and program with abstracts - Horticulture ...

O-4
Y. Xu and Y.Wang*
Introduction and application of Chinese wild Vitis species in China
College of Horticulture and Shaanxi Key Laboratory of Molecular Biology for Agriculture,
Northwest A&F University and Key Laboratory of Horticultural Plant Germplasm Resource
Utilization in Northwest China, Ministry of Agriculture Yangling, Shaanxi, China
*Corresponding author: wangyj@nwsuaf.edu.cn
China is one of major centers of origin of the Vitis species. Chinese wild Vitis species are
naturally distributed in the majority of areas throughout China, but mainly distributed in
Huazhong Area and Qinba Mountain Area located in Shaanxi and Gansu provinces in China. To
date, more than 35 species and varieties have been reported with origins in China among the
approximately 70 known species. In the past 20 years, Researchers have focused on the study of
the resistance to diseases Uncinula necator, Plasmopara viticola, Sphaceloma ampelinum,
Coniathyrium diplodiella and Glomerella cingulata of Vitis species or varieties native to China
by means of field identification, field inoculation and laboratory isolated inoculation. The results
indicated that the species and clones indigenous to China are resistant or highly resistant to the
diseases. There are differences in resistance to the diseases among all these species and clones.
However, the Chinese wild V. pseudoreticulata accession “Baihe-35-1” hold higher resistance to
disease traits than the other wild species. Cold hardiness of 17 wild Vitis species native to China,
including 38 clones, was assessed by growth, tissue browning and electrolytic conductance
methods. The results showed that the cold hardiness of V. amurensis and V. yeshanensis were
highest as compared to other species. Chinese Vitis species have many advantages over V.
vinifera such as possessing many resistant genes to main fungi diseases as well as good flavor.
Especially V. quinquangularis and V. amurensis clones hold better economical traits than the
other wild species and many disease resistant genes. So, they are used as wine materials directly
in southwest and northeast areas in China; and they exhibited high resistance to fungal diseases,
they were also easier to hybridize with V. vinifera. Thus, it is possible to use crossing to integrate
fungal disease-resistant traits from the wild Chinese Vitis into V. vinifera, thus resulting in fungal
disease-resistant new grape varieties. At present, we are interested in studying how Chinese wild
grapes sense and respond to fungal diseases using V. pseudoreticulata accession Baihe-35-1 as
material. Particularly, we are interested in understanding regulation of disease resistance
signaling mechanisms and disease resistance genes under Uncinula necator stress in Chinese
wild Vitis species. Present research involves analysis of function of target genes using biochemical
method in vitro, and also genetic and molecular characterization of Arabidopsis
mutants that are altered in response to the pathogen stimuli. The goals are to elucidate the
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