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A study of morphological characteristics and hybridization on Lepista nuda

민자주방망이버섯(Lepista nuda )의 형태적 특성 및 교배에 관한 연구

  • Jung, Won Soon (Department of Biology, the Graduate School, Catholic University of Daegu) ;
  • Kim, Jong Bong (Department of Biology, the Graduate School, Catholic University of Daegu)
  • 정원순 (대구가톨릭대학교 대학원 생물학과) ;
  • 김종봉 (대구가톨릭대학교 대학원 생물학과)
  • Published : 2013.03.31

Abstract

In this study, twelve of Lepista nuda were collected from various localities in Korea. Also thirteen exotic L. nuda species were collected from Japan, France, Switzerland and Portugal. Spores were isolated under optical microscope. These spores were placed on the surface of YM medium for inducing to germination. Eleven mating-groups were selected by morphological characters of fruit body such as size, color and stipe patterns. Intra-isolate crosses were made between two single-spore isolates derived from mating-groups. Also, dikaryotic crossing using the isolates from L. nuda were carried out to evaluated tetrakaryon formation. Cross-mating compatibility tests also verified its dikaryotic state by microscopic or molecular genetic observation of clamp connection and Random Amplified Polymorphic DNA (RAPD) band pattern. To analyze the growth rate of hybrids and parents mycelium in dikaryons obtained from compatible mating groups were placed on PDA medium. Intra-isolate crosses determined eleven mating-groups within L. nuda. The typical clamp connection were mostly observed in mating-groups of Korean L. nuda in $K1{\times}K2$, $K1{\times}K3$, $K1{\times}K4$, $K1{\times}K6$, $K1{\times}K5$, $K2{\times}K4$, $K2{\times}K3$, $K2{\times}K6$, $K3{\times}K4$, $K4{\times}K5$, and $K4{\times}K6$. Korean L. nuda type of dikaryon, shown to cross-incompatibility with L. sordida, it seemed that mating induce more rapidly than wild types in a view of growth rate. In conclusion, it would be useful to improve mass production with better morphological characteristics through a special mating of L. nuda.

본 연구에서 한국에 자생하는 12종의 민자주방망이버섯과 13종의 프랑스, 스위스, 포루투갈, 일본 등지에서 버섯을 수집하였다. 이들 한국, 외국 품종의 민자주방망이버섯은 단핵균사를 얻기 위해 이들 버섯으로부터 단포자를 얻어 YB배지에 배양하였다. 또한 민자주방망이버섯 육종을 위하여 자실체의 형태적 특성과 단핵균주의 특성 등을 고려하여 교배 단핵균주를 선별하였다. 그 결과 선별된 11개의 교배계통($K1{\times}K2$, $K1{\times}K3$, $K1{\times}K4$, $K1{\times}K6$, $K1{\times}K5$, $K2{\times}K4$, $K2{\times}K3$, $K2{\times}K6$, $K3{\times}K4$, $K4{\times}K5$, $K4{\times}K6$)에서 clamp connection을 관찰하였으며, 또한 RAPD 패턴 분석을 통해 교배 여부를 판단하였다. 교배된 2핵균주를 다시 PDA 배지에 배양하여 교배균주의 양상을 관찰한 결과 선별된 11개의 국내 야생 민자주방망이버섯으로 이루어진 교배계통은 야생품종 2핵 균사 또는 외국 민자주방망이버섯 품종 보다 성장속도가 빠른 것을 확인 하였다. 이는 앞으로 민자주방망이버섯의 한국 고유 품종개발 시 우수 교배형 선택에 있어, 기초자료로서 유용할 것으로 판단된다.

Keywords

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