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• Hybridization between Landrace and Exotic Germplasm of Hippeastrum (HippeastrumHerb.) in Vietnam Condition

  Pham Thi Minh Phuong, Tran Thi Minh Hang, Vu Van Liet

  Date Received: 25-04-2014 / Date Accepted: 15-07-2014

   Abstract PDF (VIETNAMESE)

  A hippeastrum breeding program by crosses between landrace and exotic gremplasm was carried out in Vietnam national university of Agriculture. The objective of our study was to create new hippeastrum cultivars diverse in flower color and shape for the domestic production. Genetic materials included three landrace accessions collected in Vietnam, namely H109, H112, and H126, which were used as female in crossing with three exotic cultivars imported from Japan, H. elvas, H. suzana, and H. splash. Our study proved that there was ability in crossing between the landrace and exotic of hippeastrum germplasm in Vietnam condition. The results showed that the rate of seed setting ranged from 26.9% to 55.9%, and the rate of seed germination ranged from 52.0% to 85.75%.. The hybrid seedlings grew well under condition in Hanoi. Among the crosses, three hybrids showed first flowering 20-21 months after germination. Evaluation of hybrids on the flower color and shape identified THL9-5, and THL4-7. The THL9-5 showed triangular flower shape, big flower diameter (average 17.2 cm), semi-double form (8-9 petals/flower) with dark scarlet red petal (45B). The THL4-7 had a round flower shape with flower diameter of 19.5cm, single form (6 petals/flower) with pink petals (53D). The big petals of THL4-7 exhibited good flower balance. These hybridis showed difference in the flower color and/or flower shape in comparing to the Hippeastrum varieties being cultivated in Vietnam. Having short flower stalks, they are promising for potted flower production. Our study is the first report on hippeastrum breeding, especial creating semi – double form of hippeastrum in Vietnam

• Breeding of Double Flower Hippeastrum (Hippeastrumsp.) for NorthernRegion of Vietnam

  Pham Thi Minh Phuong, Vu Van Liet

  Date Received: 17-03-2016 / Date Accepted: 05-05-2016

   Abstract PDF (VIETNAMESE)

  In recent years, Hippeastrumcultivars grown in Vietnam arehighly diverseinflower color, shapeandsize. However, the bulb supply is limited and the bulb’s price is expensive, especiallyofthe double hippeastrum. To develop double hippeastrum varieties using Vietnamese Hippeastrum genetic resource, six crosses between six Vietnamese hippeastrumaccessions (fmale parents) and 2 double flower hippeastrum varieties (male parents) were made atVietnam National University of Agriculture in 2012. Withsixhybridfruits collecteda total of 286 hybrid seedlings were produced. Evaluationof111 hybrids on majorcharacteristics,speciallythose foruse as potting plants or cut flower production, 29 hybrids were selected of which 13 had semi double petal and 16 full double petals. The hybrids showed diversity in the flower color (orange red, red, deep red, pink, white with red stripeor red with white stripeetc.). The flowershad 7,7 - 17,0 petals with/without fragrance. The flower diameter varied from 12,2cm (TH1-25) to 18,2cm (TH12-17) and the longevity rangedfrom 5 days (TH12-49) to 14 days (TH3-3 và TH12-23). These hybrids are the invaluable germplasmfor the double flower hippeastrum breeding in Vietnam.

• Study onin Vitro Micropropagation of Six hybridsHippeastrum esquestre (Aition) Herb.

  Pham Duc Trong, Nguyen Hanh Hoa, Phi Thi Cam Mien

  Date Received: 19-03-2014 / Date Accepted: 29-05-2014

   Abstract PDF (VIETNAMESE)

  This study was conducted to establish a preliminary protocol for in vitrorapid propagation of six Hybrids of H.esquestre. Results showed that the optimal medium for shoot initiation from bulb scales of six hybrids (H1, H3, H5, H37, H85, H12) wasMS + 2-3mg/lBA +1.0 mg/l kinetin + 0,25mg/l αNAA.Shoot propagation was 2.79-3.75 shoots/explant. Small shoot and bulds were divided in to four parts and cultured in to MS + 3-5mg/l BA +1.0 mg/l kinetin + 0,25mg/l αNAA.Shoot propagation was 4.23-5.65 shoots/explant.Rootingmedium consisting of MS+ 1.5-2.0mg/l NAAinduced shoots with 100%root formation. Well-rooted plantlets were successfully transplanted to sand and rice husk substrate (3:1). The rate of plants survival was 100% and plants grew and developed well.

• In vitro Propagation for Hippeastrum equestre (Aiton) Herb.

  Pham Viet Hoang, Nguyen Anh Duc, Nguyen Thi Thuy Hanh, Dinh Thai Hoang, Nguyen Viet Long

  Date Received: 12-11-2025 / Date Accepted: 30-12-2025 / Date Published: 23-01-2026

   Abstract PDF (VIETNAMESE)

  The study aimed to complete an in vitro propagation protocol for Hippeastrum equestre (Aiton) Herb. The in vitro propagation experiments were carried out on MS media containing 30 g/l sucrose, 6 g/l agar, 0.5 g/l active charcoal with different concentrations of 6-Benzylaminopurine (BA), 2,4-dichlorophenoxyacetic (2,4-D), α-Napthaleneacetic Acid (α-NAA), and Indole-3-Acetic Acid (IAA). The results showed that plant material treated with Presept at 5 g/l for 50 minutes achieved the highest survival rate (90%). Shooting medium supplemented with 3 mg/l BA and 1.0 mg/l 2,4-D gained the highest shooting ability. Rooting medium supplemented with 1 mg/l α-NAA or 1.5 mg/l IAA was optimal for the highest rooting ability, with a rooting rate of 100% and number of roots/explant ranging from 3.33 to 4.00. In the nursery, coir : soil : organic fertilizer substrate with a ratio of 6:3:1 (v/v) yielded the highest survival rate (100%), leaf number (3.53 leaves/plant), and plant height (16.34 cm). The result could be utilized for large-scale propagation of Hippeastrum in Vietnam.

  DOI: https://doi.org/10.31817/tckhnnvn.2026.24.1.02