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RISS 인기검색어
- 검색키워드
- 저자 : Rak Chun Seong(成樂春) (검색결과 2 건)
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Rak Chun Seong(成樂春)해리 시 마이너(Harry C. Minor),Eun Hi Hong(洪殷憙) 한국육종학회 1986 한국육종학회지 Vol.18 No.1
Germination and seedling elongation of soybeans(cults : ‘Essex’ and ‘Williams’), and sunflowers cults. ‘Seed Tec’ 327 and ‘SIGCO 449’) were measured at three temperatures(15.0, 22.5, and 30.0 C) and four soil water potentials(-1.80, -0.50, -0.04, and 0.02 MPa), with and without treatment with super slurper. Measurements were made at 0, 1, 2, 4, and 8 days. Seedling moisture uptake and seedling development were affected by temperature, soil water potential, and cultivar of each of the two species. Super slurper did not significantly affect seedling growth. Highly significant positive correlations were found between seedling moisture content and seedling length. Negative correlations were found between seedling dry weight and the other dependent variables. Multiple regression equations for seedling moisture content of two species were developed as a function of cultivar, temperature, soil water potential, and interaction terms in germination time. Soybeans required more time to achieve the initial one cm of seedling length than sunflowers at the lower soil water potential(-1.80 MPa), but less time at the high soil water potential(-0.02 MPa).
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Rak Chun Seong(成樂春),Jai Sung Shim(沈載成),Keun Yong Park(朴根龍) 한국육종학회 1988 한국육종학회지 Vol.20 No.2
Germination and seedling elongation of three hybrids and their five inbreds of corn [Suwon 19 : KS 5 x KS 6, Hoengsongok : (KS 15 x KS 16) KS 5, and Jinjuok : (KS 15 x KS 16) Ga 209]were measured at two temperatures (15 and 30 C) and four polyethylene glycol (PEG) 10,000 solutions (0, 20, 30 and 35g/100gH₂o). Adjustments of PEG 10,000 solutions were based on water potentials of 0.0, -0.5, -1.1 and -1.5 MPa at room temperature. Observations were taken at 3, 6, 9 and 12 days for 15 C and 1, 2, 3 and 4 days for 30C. Fifteen seeds of each of three corn hybrids and their five inbreds were placed on Whatman No. 1(9cm) filter paper in plastic petridishes, and adjusted to 15 ml of the proper PEG 10,000 solution supplemented with 0.2 percent thiram using automatic syringe. The dishes were covered with cap. The seeds were germinated at a constant temperature of 15 or 30 C under dark conditions for programmed period. Seedling moisture content and seedling length of three corn hybrids and their five inbeds were decreased as PEG concentration increased both at 15 and 30C. Varietal differences in seedling moisture content and seedling length of corn were found among eight hybrids and inbreds at temperatures of 15 and 30 C. Mean seedling moisture content of inbred KS 16 showed the highest, and inbred KS 15 was observed the lowest among eight hybrids and inbreds. however, mean seedling lengths of three hybrids were greater than inbreds from 20 to 30g/100g water of PEG concentrations. Hybrid Jinjuok showed the greatest mean seeding length among three hybrids. The results of this study indicated that germination test of corn seeds in aqueous solutions of PEG has potential for screening corn genotypes for improved emergence at moisture stress.
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