VH13 - F1 hybrid mulberry variety

VH13 - F1 hybrid mulberry variety was created by the Central Sericultural Research Centre. Scientific council, Ministry of Agriculture and Rural Development allow experimenting VH13 - F1 hybrid mulberry variety at some region in September 2000 (temporary recognition). After that, in April 2006, it was officially recognized as national mulberry variety. Because of using F1 heterosis and sexual propagation so VH13 hybrid mulberry has a lot of advantage such as: strong growth, high total branch length/tree (60,50m/tree), short node (3,0 - 3,3cm), the duration for mature leaves is average, leaf productivity reaches 48 tons/ha/year upwards (in stable mulberry field), increasing 36 percent than Ha Bac one, more 60 percent than Bau Trang, Bau Den Bao Loc and equivalence with Chinese variety. VH13 mulberry tree has less bloom, thick leaf, dark green, short node (3,0 - 3,2cm), good quality leaves. The protein content in its leaf is 22 - 24 percent while in Ha Bac and Chinese variety is 21,24 percent and 24,40 percent respectively. The cocoon yield of silkworm which was fed by VH13 mulberry leaves is higher 10 percent than compared to it when using Ha Bac mulberry leaves and more 19 percent than Chinese mulberry leaves. Shell ratio increase more than 13 percent, thicker cocoon shell, higher cocoon quality. 4th and 5th instars growth duration shorten one day. Mulberry consumption per one kg cocoon reduces more 16°/a than compared to Ha Bac and more 24 percent than compared to Chinese variety. Note that VH13 mulberry variety generates many leaves in autumn which is suitable for rearing high quality white cocoon silkworm. Advantage of VH13 mulberry variety in cultivation characteristics manifest: easy leaf plucking, less branch scratch than Ha bac and VI-19, harvesting yield increase upper 30 percent in comparison with old varieties, VH13 has wide adaptability to different ecological regions, different soil kinds (river side land, coastal land, hill land and mountainous area), high multiplication coefficient: 300kg mulberry seed per 1 ha parents mulberry gardent/1 year, material expenses for newly planting reduce 28 percent, all year round planting season, high planting survival above 90 percent and higher than planting by cutting. Especially, VH13 mulberry tree can growth rather well in drought region. VH13 s effected disease ratio, disease index (which caused by some fungi kinds) are lower than Ha Bac and Chinese mulberry varieties.