Results of selection and development of cashews and pepper varieties
2005
Pham Van Bien | Nguyen Thanh Binh | Nguyen Thai Hoc | Pham Van Dau | Ton Nu Tuan Nam | Nguyen Binh Phuong
Individual selection and top grafting methods were applied for cashew in order to reduce the cashew screening period. A cashew germplasm of 1,600 individuals were collected and evaluated, more than 40 promising elite individuals were selected. Ten cultivars, namely PN1, CH1, LG1, MH2/7, MH3/5, MH4/5, MH5/4, MH6/2, §DH66-14 and §DH67-15 were approved by the Scientific Council of the Ministry of Agriculture and Rural Development for Regional Yield Evaluation. Nut yield of the recommended cultivars reached 2 to 4 tons/ha after 4 to 5 years of planting, with a recovery ratio of kernel about 29-32 percent. The survey of pepper production in the Central Highlands and in the Southeastern Region of Vietnam showed that six local varieties, namely Vinh Linh, Tieu Trung, Se Loc Ninh, Se Mo, Tieu Trau and Tien Son, and two newly-introduced varieties Lada Belangtoeng and An Do have been grown. Vinh Linh and Tieu Trung give high yield than other varieties, but Vinh Linh provides the first harvest later than other varieties about 10-12 months. Four years after planting in the collection garden, three accessions VL1, VL2 and LD1 gave high yield (5-6 t/ha) and high pepper corn density (520-570 g/L). Results from pepper varietal trial revealed that Tieu Trung and Vinh Linh are promising varieties, their yield reached 3,6-4,2 t/ha in the second harvesting.
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