Received: 06-03-2020
Accepted: 11-06-2020
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Determination of some Technical Factors for Cucumber F1Hybrid Gl1-2 Seed Production in Northern Delta and Midlands
,
Pham My Linh
2
,
Tran Thi Minh Hang
3
Keywords
Cucumber, F1hybrid seed, variety GL1-2, Hybrid seed production
Abstract
GL1-2 is a cucumber F1hybrid variety produced successfully by researchers of Fruit & Vegetable Research Institute and approved by Ministry of Agriculture & Rural Development in 2014. This variety possesses several desired characteristics: vigorous growth, good flowering and fruiting, high yield (50 - 60 tons/ha) both in spring-summer and winter seasons in Northern Delta and Midlands areas, good fruit quality, resistance to downy mildew and powdery mildew diseases. In order to develop the seed production process, increase yield and quality of F1hybrid GL1-2 seeds, we carried out the study on determination of optimum planting ratio of parental lines, pollination time and time to harvest fruits. Three experiments were arranged in a randomized complete block with seven treatments of experiment 1 (parental ratio), five treatments of experiment 2 (pollination time), five treatments of experiment 3 (fruit age) and three replications. The experiments were set up in Spring and Summer 2017 in two provinces Thai Nguyen and Ha Noi. Our results showed that optimum planting ratio of GL1-2 parental lines was 1/4, from 8 to 9amwas an optimum time to do hand-pollination, and optimum time to harvest hybrid fruits was from 30 to 35 days after pollination, giving the best F1seed yield and quality.
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