Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Skewed Inheritance of EST-SSR Alleles in Reciprocal Crosses of Cut Roses

절화장미 품종간 정역교배에 있어서 EST-SSR 마커의 유전

  • Kim, Jin-Ki (Flower Research Institute, Gyeongnam Agricultural Research & Extension Services) ;
  • Ahn, Dong-Chun (Flower Research Institute, Gyeongnam Agricultural Research & Extension Services) ;
  • Oh, Hye-Jeong (Department of Horticultural Bioscience, Pusan National University) ;
  • Kim, Kwang-Hwan (Department of Horticultural Bioscience, Pusan National University) ;
  • Choi, Young-Mi (Department of Horticultural Bioscience, Pusan National University) ;
  • Oh, Seung-Yong (Seung Yong Horticultural Consulting & Management Institute) ;
  • Kang, Nam-Jun (Department of Horticulture, Division of Applied Life Science (BK21 Program), Graduate School, Gyeongsang National University) ;
  • Jeong, Byoung-Ryong (Department of Horticulture, Division of Applied Life Science (BK21 Program), Graduate School, Gyeongsang National University) ;
  • Kim, Zhoo-Hyeon (Department of Horticulture, Division of Applied Life Science (BK21 Program), Graduate School, Gyeongsang National University) ;
  • Park, Young-Hoon (Department of Horticultural Bioscience, Pusan National University)
  • Received : 2010.02.05
  • Accepted : 2010.03.30
  • Published : 2010.08.31
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Abstract

Matroclinal inheritance of morphological characters in interspecific crosses of Rosa spp. can be influenced by cytoplasmic inheritance, apomixis, and asynaptic heterogamy. In asynaptic heterogamy, which is often observed from interspecific crosses of Rosa sect. $Caninae$, the polyploidy of the seed parent (especially for 5x=35) is recovered in the progeny through the pollens that include only a set of bivalents (x=7) and egg cells that contain a set of bivalents (x=7) and other univalents (3x=21). In this study, we investigated the causes of matroclinal offsprings observed from reciprocal crosses of tetraploid cut rose cultivars ($Rosa$ $hybrida$ L.) by analyzing EST-SSR marker distribution in the progeny populations. From EST-SSR marker analysis of eight offsprings per six reciprocal crosses among six cultivars, cases of cytoplasmic inheritance were not observed. Apomixis was also very rare as compared to the reports on interspecific crosses of sect. $Caninae$; only one apomitic plant was identified from the cross 'Redtem' ${\times}$ 'Red Sandra'. Although a clear-cut pattern of asynaptic heterogamy was not found, cultivar-specific marker transmission skewed to seed parent in four cultivars implied that genetic inheritance can be highly influenced by the seed parent depending on crosses among cut rose cultivars; especially, 10 out of 11 alleles specific to 'Yellow King' distributed in progenies at higher ratios when the cultivars were crossed as the seed parent.

장미속 종간교잡 후대에서 발견되는 경모유전(matroclinal inheritance) 현상은 세포질 유전, 단위결과, 그리고 비대합적 배우자생식(asynaptic heterogamy)의 결과로 설명될 수 있다. 비대합적 배우자생식은 $Caninae$ 아절($Rosa$ $hybrida$ L. sect. $Caninae$ DC.)의 종간교잡에서 독특하게 관찰되며, 5배체의 경우, 화분세포를 통해서는 2가염색체(2x=14)를 이루는 상동게놈 중 한 게놈(x=7)만이, 난세포에서는 이러한 게놈(x=7)과 더불어 1가 염색체를 이루는 나머지 게놈들(3x=21)이 동시에 유전되어 후대에서 종자친의 배수성(5x=35)이 회복된다. 본 연구에서는 절화장미 품종간 정역교배시 대립유전자의 후대유전 빈도를 관찰함으로써, 4배체 품종교배에서 관찰되는 경모유전의 요인을 분석하고자 하였다. 절화장미 6품종을 이용한 6개 정역교배조합 당 8개의 후대개체를 총 30개의 EST-SSR 마커로 검정해 본 결과, 뚜렷한 세포질 유전의 경우는 발견되지 않았다. 또한, 단위결과의 경우도 'Redtem' ${\times}$ 'Red Sandra' 조합의 후대개체 하나에서만 발견되어, $Caninae$ 아절의 종간교잡에서와 비교하여 상당히 낮은 빈도였다. 비대합적 배우자생식의 예도 $Caninae$ 아절의 경우처럼 뚜렷하게 나타나지는 않았다. 하지만, 6개 공시품종 중, 4개의 품종에서 화분친 보다 종자친으로 교배시 품종 특이적 마커의 후대유전빈도가 상대적으로 높게 나타나 품종에 따라 대립유전자의 모계유전적 성향이 존재함을 증명하였다. 특히 'Yellow King'의 경우, 11개의 대립유전자 중 10개가 종자친일 경우에 후대집단에서 높은 빈도로 나타나 공시품종 중 가장 강한 모계유전성을 보였다.

Keywords

References

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