刚果(布)耐花叶病高产木薯品种筛选

Screening Cassava Varieties with Resistance to Cassava Mosaic Disease in Congo(Brazzavill)

木薯花叶病对非洲国家每年的木薯生产造成很大损失。为获得耐花叶病木薯品种,对17个木薯栽培种（包括6个华南系列品种）在中国援刚果（布）农业技术示范中心进行了适应性试验。结果表明,K-265的产量最高,为42.15 t/hm2,8个月后发病率较轻,为12%,属于耐花叶病的高产木薯品种,适宜在刚果（布）大面积推广种植。I93产量中等,为25.95 t/hm2,但叶片的花叶病发病率最低,是1个高耐花叶病毒病的木薯品种,在刚果（布）花叶病高发地区可推广种植。华南系列木薯品种除SC101外,其他5个品种均属高感花叶病品种,产量在7.90~13.26 t/hm2,不适合在刚果（布）推广种植。

Cassava mosaic disease（CMD） causes severe losses to the cassava production in African countries each year. Seventeen cassava verities included 6 cultivars of South China series were planted in Congo Agricultural Demonstration Center to select varieties with resistance to CMD. The results showed that the varity K-265 had the highest yield of 42.15 t/hm2. The CMD incidence of K-265 was 12% after 8 months planting. It belonged to the CMD resistant cassava varieties, and would be adaptable to plant in Congo（ Brazzaville）. The varity I93 had a moderate yield of 25.95 t/hm2, but it had the lowest CMD incidence with 4%. It was a high CMD tolerant variety to be adaptable to plant in the CMD pandemics areas in Congo（ Brazzavill）. Besides SC101, the other five cultivars of South China cassava were susceptible to CMD with low yield from 7.90 t/hm2 to 13.26 t/hm2. They would be not adaptable to plant in Congo（Brazzaville）.