Germination Characteristics and Daily Seed Germinating Pattern in New Varieties of the Third Generation of Creeping Bentgrass Under ISTA Conditions

ISTA 생육환경에서 제3세대 크리핑 벤트그래스 신품종의 발아특성 및 일일 발아패턴

  • Kim, Kyoung-Nam (Dept. of Horticulture, College of Science and Technology, Sahmyook University) ;
  • Cho, Chi-Uong (Dept. of Horticulture, College of Science and Technology, Sahmyook University) ;
  • Bae, Yoon-Hwan (Dept. of Life Science, College of National Sciences, Daejin University) ;
  • Park, So-Hyang (Dept. of Horticulture, Graduate School, Sahmyook University)
  • 김경남 (삼육대학교 과학기술대학 원예학과) ;
  • 조치웅 (삼육대학교 과학기술대학 원예학과) ;
  • 배윤환 (대진대학교 자연과학대학 생명과학과) ;
  • 박소향 (삼육대학교 대학원 원예학과)
  • Received : 2010.04.29
  • Accepted : 2010.07.01
  • Published : 2010.08.30

Abstract

Research was initiated to investigate germination characteristics and germination pattern of creeping bentgrass (CB, Agrostis palustris Huds.). Seven varieties of CB were evaluated in the study. An alternative condition for a CB germination test required by International Seed Testing Association (ISTA) was applied in the experiment, consisting of 8-hr light at $25^{\circ}C$ and 16-hr dark at $15^{\circ}C$ (ISTA conditions). Daily and cumulative germination patterns were measured and analyzed on a daily basis. Significant differences were observed in germination pattern, days to the first germination, days to 50% germination, days to 85% germination, and germination percentage. Germination rates were different among the treatments at the end of study. There were significantly considerable variations in early germination characteristics and germination pattern among CB varieties. The first germination in all entries was initiated between 4 and 5 DAS (days after seeding) under ISTA conditions. Generally, the first germination percentage was 5 to 25%. However, such Penn-series varieties as Penn A-1, Penn A-4 and Penncross were much more vigorous over others, resulting in 50 to 75% in the first germination percentage. It took 4 to 10 DAS in reaching to days to the 50% germination, being 5 days in difference among the varieties. Days to the 85% germination were 5.90 to 11.75 DAS under ISTA conditions, being 5.85 days in variety difference. It means 1 to 2 days after days to 50% germination. Penn A-1 was the fastest variety, while T-1 the slowest one. Considering days to the first germination, days to 85% germination, and germination pattern etc, Penn A-1, Penn A-4, Penncross and L-93 were regarded as excellent varieties under ISTA conditions. From this study, in-depth information on germination characteristics and pattern would be usefully applied for golf course design and construction, when established with CB.

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