한국농림기상학회지 (Korean Journal of Agricultural and Forest Meteorology)

  • 제15권4호
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  • Pages.234-244
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  • 2013
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  • 1229-5671(pISSN)
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  • 2288-1859(eISSN)
한국농림기상학회 (Korean Society of Agricultural and Forest Meteorology)
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느티나무 종자특성의 지리적 변이와 1년생 유묘의 생장

Geographic Variation of Seed Characteristics and 1-year-old Seedling Growth of Zelkova serrata

  • 김인식 (국립산림과학원 산림유전자원부) ;
  • 이주환 (국립산림과학원 산림유전자원부)
  • Kim, In Sik (Department of Forest Genetic Resources, Korea Forest Research Institute) ;
  • Lee, Joo Hwan (Department of Forest Genetic Resources, Korea Forest Research Institute)
  • 투고 : 2013.10.07
  • 심사 : 2013.12.09
  • 발행 : 2013.12.30
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초록

본 연구는 느티나무 집단의 종자특성 변이에 영향을 미치는 요인과 종자특성이 유묘생장에 미치는 영향을 구명하고자 수행되었다. 이를 위해 느티나무16개 집단에서 종자를 채취하여 특성을 조사하였으며, 포지에서 1년간 양묘한 후 묘목의 생장을 조사했다. 종자특성과 유묘생장에 영향을 미치는 요인을 구명하고자 조사형질과 종자채취 집단의 지리적기후적 인자와의 상관분석을 실시했다. 종자특성에 대한 분산분석 결과, 모든 측정형질에서 집단 간에 유의한 차이가 있었다. 지리적 요인과의 상관을 분석한 결과, 종자길이와 종자폭은 위도, 경도, 해발고, 해안으로부터 거리와 정의 상관을 보여준 반면, 종자형상비는 부의 상관을 나타냈다. 기후인자와의 상관을 분석한 결과, 종자길이와 종자폭은 종자채취 집단의 연평균 기온 및 생육기(3~8월)의 평균기온과 부의 상관을 나타냈으며, 종자형상비는 이들과 정의 상관을 보여주었다. 천립중은 지리적요인과 상관이 없었고, 기후인자 중 건조지수와 유의하지만 낮은 정의 상관을 나타냈다. 용적중은 위도, 경도와 낮은 부의 상관을 나타냈으며, 생육기 (3~8월)의 평균 습도와 정의 상관을 나타냈다. 종자충실율은 위도, 경도와 유의한 부의 상관을 보였으며, 건조지수와는 유의한 부의 상관을 나타냈다. 유묘의 생장은 묘고와 근원경 모두 집단 간, 집단 내 가계 간 그리고 가계 내 개체 간에 유의한 차이가 있는 것으로 나타났다. 묘고와 근원경은 모두 경도 및 생육기(3~8월) 평균 습도와 유의한 부의 상관을 나타냈다. 종자특성과 유묘생장의 상관을 분석한 결과, 묘고생장은 종자특성과 상관이 없었으며, 근원경은 천립중 및 용적중과 유의하지만 낮은 부의 상관을 나타냈다. 이러한 점을 볼 때, 느티나무 1년생 유묘의 생장은 종자특성의 영향이 크지 않은 것으로 판단되었다. 전반적으로 볼때, 종자특성과 유묘생장은 집단 간에 유의한 차이가 있었지만, 지리적 또는 기후적 요인과의 상관성이 낮아 그 경향성이 뚜렷하지 않은 것으로 나타났다. 따라서, 1년생 유묘에 대한 분석만으로는 느티나무 집단의 유전적 특성 및 지리적 변이를 정확히 추정하기 어렵다고 판단되며, 추후 산지시험을 통한 조림지 적응성 및 생장특성 검정 결과를 토대로 느티나무 집단에 대한 평가가 이루어져야 할 것으로 보인다.

This study was conducted to determine the factors affecting to seed characteristics and seedling growth of Zelkova serrata. The seeds were collected from sixteen populations of Z. serrata and the seed characteristics (i.e., seed length, width, weight and full seed rate) were measured. We also measured the 1-year-old seedling growth of each population at nursery. All seed characteristics showed significant differences in population level. Seed length and seed width were positively correlated with latitude, longitude, altitude and distance from coast line of sampling site. Seed length and seed width also negatively correlated with annual mean temperature, mean temperature of growing season (Mar.~Oct.). The ratio of seed length/seed width showed inverse trend in case of seed length and seed width. Seed weight/1,000 grains had no correlation with geographic factors but showed negative correlation with annual mean dryness index. Seed weight/L showed negative correlation with latitude and longitude and positive correlation with mean temperature of growing season of sampling site. Full seed rate showed negative correlation with latitude, longitude and annual mean dryness index of sampling site. There were significant differences among populations, among family within population and among individuals within family in seedling growth. Height and diameter of root collar of seedling showed negative correlation with longitude and mean humidity of growing season of sampling site. Height growth of seedlings was not correlated with any seed characteristics but, diameter at root collar showed low negative correlation with seed weight/1,000 grains and seed weight/L. We discussed the implications of the results in view of tree improvement of Z. serrata.

키워드

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