Effects of temperature and PEG solution on germination and seedling elongation in corn hybrids and inbreds

• 발행기관: 한국육종학회
• 저자명: Rak Chun Seong(成樂春) Jai Sung Shim(沈載成) Keun Yong Park(朴根龍)
• 간행물 정보: 『한국육종학회지』Vol.20 No.2, 35~41쪽, 전체 7쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 1988.06.30

영문 초록

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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LITERATURE CITED