Korean Journal of Plant Resources (한국자원식물학회지)

The Plant Resources Society of Korea (한국자원식물학회)
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Scab Resistance of Some Pear Genetic Resources and Inter Specific Hybrid Seedlings in Field Condition

포장조건에서 주요 배 유전자원과 종간교배 집단의 검은별무늬병 저항성

  • Kim, Yoon-Kyeong (Pear Research Institute, National Institute of Horticultural and Herbal Science, Rural Development Administration) ;
  • Jeong, Hae-Won (Pear Research Institute, National Institute of Horticultural and Herbal Science, Rural Development Administration) ;
  • Won, Kyung-Ho (Pear Research Institute, National Institute of Horticultural and Herbal Science, Rural Development Administration) ;
  • Kang, Sam-Seok (Pear Research Institute, National Institute of Horticultural and Herbal Science, Rural Development Administration) ;
  • Lee, Ug-Yong (Pear Research Institute, National Institute of Horticultural and Herbal Science, Rural Development Administration) ;
  • Han, Tae-Ho (Department of Horticulture, Jeonnam National University)
  • 김윤경 (국립원예특작과학원 배연구소) ;
  • 정해원 (국립원예특작과학원 배연구소) ;
  • 원경호 (국립원예특작과학원 배연구소) ;
  • 강삼석 (국립원예특작과학원 배연구소) ;
  • 이욱용 (국립원예특작과학원 배연구소) ;
  • 한태호 (전남대학교 원예학과)
  • Received : 2019.03.31
  • Accepted : 2019.06.25
  • Published : 2019.08.31
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Abstract

This study was accomplished to select breeding materials among the pear germplasm 6 species 43 accessions and check out the expression of scab incidence of inter specific hybrids of 5 crosses 609 seedlings for scab resistance breeding. Fruitlets scab incidence of P. pyrifolia, P. bretschneideri and P. ussuriensis were 59.5, 73.4 and 63.0% respectively, and also fruitlets scab incidence of interspecific hybrid cultivars between P. pyrifolia and P. bretschneideri were 77.7%. However, fruitlets scab incidence of P. communis and interspecific hybrid accessions between P. pyrifolia and P. communis were significantly less than 15%. As a result of the Duncan test, scab resistance of pear accessions were classified into two groups: P. communis and their hybrid were resistance and P. bretschneideri, P. pyrifolia, P. ussuriensis, and among their hybrid were susceptible. Also, it showed the same trend in the seedlings. Scab incidence of 'Seolwon' ${\times}$ 'Chuwhangbae' and 'Supergold' ${\times}$ 'Mantienhong' in P. pyrifolia seedlings showed more than 80%, while that of interspecific hybrid between P. pyrifolia and P. communis showed about 2%. It showed scab resistance of P. communis transferred to hybrid seedlings and expressed to be dominant in their seedlings. Namely, P. communis was good breeding materials for scab resistance.

본 연구는 주요 배유전자원 43 accession을 대상으로 육종소재로 활용할 수 있는 배 유전자원 선발과 종내 또는 종간 5개 교배집단 609 seedling에서 배 검은별무늬병 저항성 발현을 확인하고자 수행하였다. P. pyrifolia, P. bretschneideri, P. ussuriensis는 검은별무늬병 병든 과실률이 각각 59.5, 73.4, 63.0%, P. pyrifolia와 P. bretschneideri 종간 교잡으로 얻어진 품종은 77.7%로 병든 과실률이 비교적 높았으나 P. communis, P. pyrifolia ${\times}$ P. communis종간교잡에 속하는 품종들은 15% 미만의 병든 과실률을 보였다. 검은별무늬병에 대한 저항성을 종별로 구분하여 Duncan 검정한 결과, P. bretschneideri, P. pyrifolia, P. ussuriensis, pyrifolia ${\times}$ P. bretschneideri 종이 P. communis, P. pyrifolia ${\times}$ P. communis두 개 종 그룹보다 검은별무늬병 병든 과실률이 유의하게 높았고 이러한 경향은 교배집단에서도 동일하였다. P. pyrifolia 종내 교배집단은 80% 이상의 검은별무늬병 감염률을 보인 반면, P. pyrifolia ${\times}$ P. communis의종간교배 집단은 2% 수준의 낮은 배 검은별무늬병 감염률을 보였다. P. pyrifolia 와 P. communis를 종간교배 하면 서양배의 저항성 인자가 우성으로 작용하여 그 후대에서 배 검은별무늬병에 강한 개체들이 대부분 얻어지기 때문에 P. communis는 배 검은별무늬병저항성 품종 육종소재로 적합하다.

Keywords

References

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