Korean Journal of Breeding Science (한국육종학회지)

The Korean Society of Breeding Science (한국육종학회)
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Differences of Physiological Responses According to Growing Conditions Between Superior Family and Inferior Family in Pinus densiflora

소나무 생장 우수가계와 불랑가계의 생육환경에 따른 생리적 반응 차이

  • Oh, Chang-Young (Department of Forest Genetic Resources, Korea Forest Research Institute) ;
  • Han, Sang-Urk (Department of Forest Genetic Resources, Korea Forest Research Institute) ;
  • Kim, Chang-Soo (Department of Forest Genetic Resources, Korea Forest Research Institute)
  • 오창영 (국립산림과학원 산림유전자원부) ;
  • 한상억 (국립산림과학원 산림유전자원부) ;
  • 김장수 (국립산림과학원 산림유전자원부)
  • Received : 2008.05.02
  • Published : 2008.06.10
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Abstract

We conducted this study to compare physiological response according to growing conditions between superior and inferior family of Pinus densiflora. In 1981, open-pollinated (OP) progenies of P. densiflora were planted in Chuncheon (CC) and Naju (NJ). We selected KW2 as a superior family and KW23 as a inferior family based on volume index among 30 OP progenies. We calculated general combining ability of each 30 OP progenies in each sites, and compared family growth rank. We collected needles of selected families in CC and NJ, and analyzed chlorophyll content, nitrated reductase (NR) activity, nitrogen content, and superoxide dismutase (SOD) acitivity. In CC, chlorophyll content and nitrogen content were more in needles of KW2 than those of KW23. In NJ, KW2 showed higher NR activity than KW23, and according to site, families in CC showed higher NR activity than those in NJ. SOD activities of both families were higher in NJ, and KW23 showed higher activity than KW2 in both sites. Consequently, inconsistency of the growth performance of two families was caused by different genetic and physiological responses.

소나무 풍매차대 중에서 생장 우수가계와 불량가계 간의 생육 환경에 따른 생리적인 반응 차이를 알아보고자 본 연구를 수행하였다. 본 연구에 사용된 풍매 차대는 1981년에 강원, 춘천, 전남 나주 지역에 조성한 차대검정림에서 풍매차대 30가계 중에서 재적지수에 따라 선발한 것으로 생장 우수 가계인 강원 2호와 불량가계인 강원 23호를 대상으로 하였다. 선발 가계의 지역 내에서의 재적지수 표준화를 통하여 30가계에 대한 일반조합능력을 산출하여 생장 순위를 비교하였으며, 선발된 두 가계를 대상으로 잎을 채취하여 엽록소 함량, 질산, 환원효소 활성, 질소 함량 및 SOD 활성을 분석하였다. 엽록소 함량과 질소 함량은 춘천지역에서 강원2호가 높은 것으로 나타났다. 질산환원효소 활성은 나주지역에서 강원2호가 강원23호보다 높게 나타났으며, 가계별로 춘천 지역이 나주 지역에 비하여 활성이 높은 것으로 나타났다. 나주 지역의 SOD활성이 높게 나타났으며, 지역별 가계간에는 두 지역 모두 강원23호가 높은 것으로 나타났다. 본 연구 결과 두 가계가 생육 환경에 따라서 유전적 작용과 생리적 반응이 다르기 때문에 생장 차이가 나타난 것으로 판단된다.

Keywords

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