KẾT QUẢ NGHIÊN CỨU, CHỌN TẠO GIỐNG DÂU LAI GQ2 CHO CÁC TỈNH MIỀN BẮC VÀ MIỀN TRUNG

Hybrid mulberry variety GQ2 was bred by crossing Que 1 mulberry variety with No2 which was selected in germplasm imported from Guangdong and Guangzhou, China. Experiment has shown that the variety has characteristics of vigorous growth and development, larger leaf size (17% in length and 11% in width) than controlled variety - VH13. Therefore leaf/twig ratio was also 14% higher in GQ2 compared with the control. Average leaf productivity in GQ2 was 31.70 tons, that is 15% higher than controlled variety at three experiment sites in two difficult ecological regions. Quality testing showed that there was no difference in leaves quality between two varities. GQ2 variety is more vulnerable to diseases but better resilient to pestilent insects than controlled variety.