Received: 11-02-2020 / Accepted: 09-04-2020
This study was carried out to breed the inbred variety with short grown duration, high yield, good quality and lightpest-resistant for Northern region of Vietnam. The DH12 was developed from segregational populations, which have derived from R2/R9311 line combination and selected by the pedigree method. DH12 has a short grown duration, 130-135 days in the spring season, 105-110 days in the summer season, 98-102 days in the Autumnseason. DH12 has good characteristics such as averageplantheight, roll flat leaves and light diseases infection. In field trials, DH12 has yield 7.2-7.8 tons/hectare in the spring season, 6.5-6.8 tons in summer season and 5.8-6.0 tons in the autumnseason, higher than controlvariety (Khang dan 18) from 10.1 to 22.0%. DH12 has milling rice 63.34%, head rice recovery 58.64%, long grain 6.9 mm, slender grain and good cooking quality. Thus, the breeding through cross hybrid between quality rice variety and intensive variety, and was selected by pedigree method, which can create new rice variety, has good quality, high yield and suitable cultivable with the conditions in northern Vietnam.