ISHS Acta Horticulturae 402: International Symposium on Cultivar Improvement of Horticultural Crops. Part 1: Vegetable Crops
A PRELIMINARY REPORT ON SCREENING THE RESISTANCE OF WATERMELON VARIETIES TO FUSARIUM WILT |
| Authors: | Z. Xuewei, H. Xuesen, G. Qinsheng, J. DingLiang, N. Li |
| Abstract:
Watermelon production in China, which has been gradually increasing since the early 1980's, has been damaged severely by vascular Fusarium wilt. To find an effective method of control, we stared to screen the resistance of watermelon germplasm ot Fusarium wilt, and to breed resisatant varietes. More than 500 germplasm materials were screened by using root-dipping inculation method at the seedling stage. The experiment results showed that none were highly resistant; 29 were moderatly resistant, accounting for 5.66%; 41 were slightly resistant, accounting for 7.99%; 443 were susceptible, accounting for 86.35%. Nearly all resistant germplasm were introduced form abroad, indicating that they could be applied as resistance resources in breeding. Screening disease resistance of germplasm is not only basic work of germplasm research but also an inseperated part of platn breeding for disease resistance. The screening of disease resistance in watermelon germplasm and watermelon breeding for disease resistance have been conducted since early this century in western countries. As a result, many disease resistant varieties have been developed, such as "Conqueror", "Charleston Gray", "Calhoun Gray", "Summit", "Crimson Sweet", "Jubilee", "Dixielee", "Smokylee" etc. These varieties have been intruduced sucessively of our country, and have promoted watermelon breeding, especially disease resistance breeding, in China. The screening of watermelon germplasm resistance to Fusarium wilt has been conducted in our working group since the China's Cooperation Group of Watermelon Disease Resistance Breeding established in October 1986. The materials were provided by the Division of Watermelon & Muskmelon and Watermelon Disease Resistance Breeding Group in our institute. More than 500 germplasm materials had been screened primarily, some of them underwent multiple screening. Some resistant varieties found may be applied to watermelon production or used as resistance resources in breeding. | |
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