• Journal of Applied Biological Chemistry
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• 제59권4호
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• pp.337-343
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• 2016

배는 과즙이 풍부하고 단맛이 뛰어나 우리나라에서 가장 즐겨 먹는 과일 중의 하나이다. 현재 국내에서 재배되고 있는 '신고' 품종의 재배면적은 81.5 %를 차지하고 있으며 대부분 생과로 소비하고 있다. 이러한 단일 품종의 편중화로 배의 재배 면적의 13.3 %를 신품종으로 갱신하고 있다. 최근 신품종 등 다양한 배에 대한 소비자의 요구가 커지고 있어 '신고' 품종에 대한 소비가 현저히 감소하고 있으며 그 수요는 증가하지 않는 실정이다. 이를 극복하기 위해 다양한 신품종 배들이 도입되고 있으며, 이들의 물리적, 화학적 및 생리활성 연구도 활발히 진행되고 있다. 따라서 본 연구에서는 지금까지 연구해 온 신품종 배들의 이화학적 및 항산화 활성에 대해 소개하고자 한다.

• 한국식품저장유통학회지
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• 제20권2호
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• pp.222-226
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• 2013

국내 육성 배 신품종과 신고 품종의 부위별 생리활성을 확인하고자 총 폴리페놀 화합물 및 총 플라보노이드 함량과 전자공여능, 아질산염 소거능 등 항산화 활성을 비교하였다. 총 폴리페놀 함량은 품종별로는 추황배와 한아름이 다른 품종에 비해 높았으며, 과피, 과육, 과심이 각각 178~235, 95~113, 177~229 mg/100 g으로, 과피>과심>과육의 순으로 높아 부위별로 차이가 있었다. 총 플라보노이드 함량은 품종별로 추황배와 감천배가 높았으며, 과피, 과육, 과심이 각각 29.2~40.2, 24.3~34.3, 26.9~38.8 mg/100 g으로 과피가 과육과 과심에 비해 높았다. 전자공여능은 품종별로는 추황배와 감천배가, 부위별로는 과육(7.6~17.7%)이나 과심(29.1~38.2%)보다 과피(29.7~57.7%)에서 더 높은 소거능을 보였다. 아질산소거능은 추황배와 한아름이 18.0, 17.9%로 가장 높았으며, 부위별로는 과피(21.0~49.8%)>과심(11.8~16.2%)>과육(7.8~9.7%)의 순으로 높았으며, 특히 과피의 항산화활성이 우수하였다.

• Journal of Plant Biotechnology
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• 제4권2호
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• pp.45-52
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• 2002

A lot of SSRs (simple sequence repeats) in peach and pear from enriched genomic libraries and in peach from a cDNA library were developed. These SSRs were applied to other related species, giving phenograms of 52 Prunes and 60 pear accessions. Apple SSRs could also be successfully used in Pyrus spp. Thirteen morphological traits were characterized on the basis of the linkage map obtained from an $F_2$ population of peach. This map was compiled with those morphological markers and 83 DNA markers, including SSR markers used as anchor loci, to compare different peach maps. Molecular markers tightly linked to new root-knot nematode resistance genes were also found. A linkage map including disease related genes, pear scab resistance and black spot susceptibility, in the Japanese pear Kinchaku were constructed using 118 RAPD markers. Another linkage map, of the European pear Bartlett, was also constructed with 226 markers, including 49 SSRs from pear, apple, peach and cherry. Maps of other Japanese pear cultivars, i.e., Kousui and Housui, were also constructed. These maps were the first results of pear species.

• 한국식물생명공학회:학술대회논문집
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• 한국식물생명공학회 2002년도 추계학술대회
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• pp.101-109
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• 2002

A lot of SSRs (simple sequence repeats) in peach and pear from enriched genomic libraries and in peach from a cDNA library were developed. These SSRs were applied to other related species, giving phenograms of 52 Prunus and 60 pear accessions. Apple SSRs could also be successfully used in Pyrus spp. Thirteen morphological traits were characterized on the basis of the linkage map obtained from an $F_2$ population of peach. This map was compiled with those morphological markers and 83 DNA markers, including SSR markers used as anchor loci, to compare different peach maps. Molecular markers tightly linked to new root-knot nematode resistance genes were also found. A linkage map including disease-related genes, pear scab resistance and black spot susceptibility, in the Japanese pear Kinchaku were constructed using 118 RAPD markers. Another linkage map, of the European pear Bartlett, was also constructed with 226 markers, including 49 SSRs from pear, apple, peach and chewy. Maps of other Japanese pear cultivars, i.e., Kousui and Housui, were also constructed. These maps were the first results of pear species.

• 한국식물생명공학회:학술대회논문집
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• 한국식물생명공학회 2002년도 춘계학술대회
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• pp.101-109
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• 2002

A lot of SSRs (simple sequence repeats) in peach and pear from enriched genomic libraries and in peach from a cDHA library were developed. These SSRs were applied to other related species, giving phenograms of 52 Prunus and 60 pear accessions. Apple SSRs could also be successfully used in Pyrus spp. Thirteen morphological traits were characterized on the basis of the linkage map obtained from an Fa population of peach. This map was compiled with those morphological markers and 83 DHA markers, including SSR markers used as anchor loci, to compare different peach maps. Molecular markers tightly linked to new root-knot nematode resistance genes were also found. A linkage map including disease-related genes, pear scab resistance and black spot susceptibility, in the Japanese pear Kinchaku were constructed using 118 RAPD markers. Another linkage map, of the European pear Bartlett, was also constructed with 226 markers, including 49 SSRs from pear, apple, peach and cherry. Maps of other Japanese pear cultivars, i.e., Kousui and Housui, were also constructed. These maps were the first results of pear species.

• 한국식물병리학회지
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• 제10권3호
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• pp.169-174
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• 1994

A new unidentified pear leaf spot disease presumed to first occur in the late 1970's has recently become prevalent over the pear growing areas, and caused the greatest problem for pear production in Korea. The disease began to develop on pear leaves at mid- to late May, peaked at mid- to late une, but stopped further development until September in cool climate. Leaf lesions are 0.9∼2.5 mm in diam., oval or irregular to rectangular in shape, first appeared reddish purple, later changed to dark brown, and to whitish grey in the late season. Lesions were limited to appear only on the mature, hardened leaves, initially from leaf margin or near the leaf veins, and later scattered over the leaf surface. Individual lesions usually did not enlarge, but often coalesced each other, commonly causing shot holes and eventual early falling. The disease was most severe on the major pear cultivars Niitaka and Okusankichi ranged with 4 to 100% infections in trees, depending on the orchards, but not on the cultivar Chojuro. Damages from the disease included lower fruit weight, and higher acid and less sugar content in fruits, resulting in lowering the overall fruit quality. Etiology of the disease including identification of the causal organism is in a separate paper.

• 한국미생물·생명공학회지
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• 제37권3호
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• pp.213-218
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• 2009

The goal of this study was to develop new functional pear wine using six Asian pears (Pyrus pyrifolia, Nakai), namely Wonhwang, Niitaka, Whangkeumbae, Whasan, Gamcheonbae and Chuwhangbae. To select optimal yeast and pear, we investigated the physicochemical properties of the pear wines from fermentation of musts of six pear cultivars at $25^{\circ}C$ for 7 days by several yeasts. $11.2%{\sim}12.4%$ of ethanol from musts of 'Wonhwang', 'Whangkeumbae' and 'Whasan' were produced by Saccharomyces cerevisiae K-7 and 12.8% of ethanol was also produced from 'Niitaka' by commercial Saccharomyces cerevisiae C-2. 9.9% and 11.4% of ethanol were produced from musts of 'Gamcheonbae' and 'Chuwhangbae' by Saccharomyces cerevisiae KCTC 7904, respectively. Among several pear wines, Niitaka pear wine showed the best acceptability in the sensory evaluation, and Niitaka pear wine and Whangkeumbae pear wine showed 31.1% and 27.8% of antihypertensive angiotensin I-converting enzyme(ACE) inhibitory activity, respectively. However, the other functionalities were not detected or very low. Furthermore, Niitaka-strawberry mixed fermentation wine was showed the excellent acceptability and high antihypertensive ACE inhibitory activity of 64.9%.

• 농업과학연구
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• 제38권3호
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• pp.405-411
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• 2011

In this study, we evaluated the changes of fruit quality indices during fruit development and ripening in Korean new pear cultivar 'Wonhwang' and 'Whasan' to determine appropriate harvest time and to enhance the marketability. The fruit of each cultivar harvested from 100 days after full bloom (DAFB) to 135 and 150 DAFB in 'Wonhwang' and 'Whasan', respectively. The fruit growth of both cultivars showed a typical single sigmoidal pattern. Flesh firmness of two cultivars decreased continuously with fruit development and ripening, reaching a final level of about 2.6 kgF at harvest stage. The starch content of fruit sap was much higher in the fruits of early development stage than the later stage of fruit ripening. In 'Wonhwang' pears, the starch level decreased coincide with fruit ripening (130 DAFB), while that of 'Whasan' decreased from very early stage of fruit development (120 DAFB), 30 days before full ripe. 'Whasan' pear showed much lower acidity level of about 0.13% during fruit development and ripening period compared with that of 'Wonhwang'. Therefore, the ratio of soluble solids to total acidity (TSS/acid) increased gradually with fruit development and ripening, reaching a final level of 80 and 98 in 'Wonhwang' and 'Whasan', respectively. There were no climateric rise of fruit respiration during fruit ripening periods in two oriental pear cultivar. The changes of skin color difference including hunter vale $a^*$ which means loss of green color occurred only after onset of ripening in two cultivars.

• The Plant Pathology Journal
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• 제32권6호
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• pp.545-551
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• 2016

A bacterial pathogen, Pseudomonas syringae pv. actinidiae (Psa), is a causal agent of kiwifruit bacterial canker worldwide. Psa biovar 3 (Psa3) was first detected in 2011 at an orchard in Dodeok-myeon, Goheung-gun, Jeonnam Province in Korea. In this study, we present the results of an epidemiological study regarding Psa3 occurrence on kiwifruit orchards in Korea for the period of 2013 to 2015. Since the first detection of Psa3 in 2011, there was no further case reported by 2013. However, Psa3 was rapidly spreading to 33 orchards in 2014; except for three orchards in Sacheon-si, Gyeongnam Province, most cases were reported in Jeju Island. Entering 2015, bacterial canker by Psa3 became a pandemic in Korea, spreading to 72 orchards in Jeju Island, Jeonnam, and Gyeongnam Provinces. Our epidemiological study indicated that the first Psa3 incidence in 2011 might result from an introduction of Psa3 through imported seedlings from China in 2006. Apart from this, it was estimated that most Psa3 outbreaks from 2014 to 2015 were caused by pollens imported from New Zealand and China for artificial pollination. Most kiwifruit cultivars growing in Korea were infected with Psa3; yellow-fleshed cultivars (Yellow-king, Hort16A, Enza-gold, Zecy-gold, and Haegeum), red-fleshed cultivars (Hongyang and Enza-Red), green-fleshed cultivars (Hayward and Daeheung), and even a kiwiberry (Skinny-green). However, susceptibility to canker differed among cultivars; yellow- and red-fleshed cultivars showed much more severe symptoms compared to the green-fleshed cultivars of kiwifruit and a kiwiberry.

• 한국육종학회지
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• 제41권4호
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• pp.534-538
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• 2009

"옥보석" 품종은 농촌진흥청 국립원예특작과학원 배시험장에서 1993년 "남고"와 "양청매"를 교배하여 2001년부터 2004년에 걸쳐 1차 선발하고, 2005년에 2차 선발하여 2006년 최종 선발하여 명명되었다. 과실은 약 14.0g으로 약간 작은 편이지만 다수성이며 과육률은 약 88.3% 이다. 원예적 성숙기는 6월 중순, 생리적 성숙기는 6월 하순이다. 만개기는 남고보다 약 4일 가량 늦고, 꽃은 분홍색 홑꽃이다. 과실은 검은별무늬병과 세균성구멍병에 비교적 강하다. "옥보석"의 화분량은 100화당 약 96 mg으로 화분이 풍부하므로 다른 품종의 수분수로의 이용은 가능하나 주 재배품종과의 자가불화합성 여부의 확인이 필요하다. "옥보석"은 설탕절임용으로도 이용 가능하며 특히 양조용으로 적합하다.