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마경복(Kyeong-Bok Ma),천종필(Jong-Pil Chun),김정배(Jung-Bae Kim),도경란(Kyung-Ran Do),조광식(Kwang-Sik Cho),최진호(Jin-Ho Choi),황해성(Hae-Sung Hwang) 한국원예학회 2012 원예과학기술지 Vol.30 No.1
This study was conducted to elucidate the cause of micro-cracking in the exocarp of ‘Jinmi’ peach (Prunus persica). through the microscopic observation of fruit skin development in 4 varieties such as ‘Jinmi’, ‘Kanoiwa Hakuto’, ‘Kawanakajima Hakuto’, and ‘Yumyeong’. Micro-cracking was noted in 59.1% of ‘Jinmi’, 30.6% of ‘Kanoiwa Hakuto’, 21.5% ‘Kawanakajima Hakuto’ and 6.4% of ‘Yumyeong’, respectively. The development of intercellular spaces, which increased rapidly with the fruit development, was easily observed at 69 days after full bloom. Histological studies revealed that the number of outer epiderm cell layers of ‘Jinmi’ was smaller than that of the other three cultivars, and thinner than the ‘Kawanakajima Hakuto’ and ‘Yumyeong’. Moreover, ‘Jinmi’ exhibited smaller and flatter shapes in the sub-epidermal cell layer than those of the ‘Kawanakajima Hakuto’ and ‘Yumyeong’ at harvest season. Therefore, these results suggest that micro-cracking of ‘Jinmi’ fruit skin was due to poor-developed outer epidermis and well-developed intercellular spaces just under exocarp as compared with other varieties.
김윤경(Yoon-Kyeong Kim),강삼석(Sam-Seok Kang),원경호(Kyung-Ho Won),신일섭(Il-Sheob Shin),조광식(Kwang-Sik Cho),마경복(Kyeong-Bok Ma),김명수(Myung-Su Kim),최장전(Jang-Jeon Choi),최진호(Jin-Ho Choi) 한국원예학회 2016 원예과학기술지 Vol.34 No.4
To develop scab-resistant pear (Pyrus spp.) varieties with fruits that are as crisp and juicy as Asian pears, a cross was made between ‘Whangkeumbae’ and ‘Bartlett’ varieties (P. pyrifolia × P. communis) at the Pear Research Institute of the National Institute of Horticultural & Herbal Science, Rural Development Administration, in 1994. Among the 285 seedlings, ‘Greensis’ was first selected in 2006 for its good eating quality and named in 2012 after regional adaptation tests in nine regions and ten experimental plots from 2007 to 2012. The tree showed a vigorous growth habit and semi-spreading characteristics, like ‘Whangkeumbae’. The optimum fruit harvest date was also around Sept. 26 and fruit was round in shape and green in skin color at maturity. Average fruit weight was 470g, and the soluble solids content was 12.4°Brix. The flesh was very crisp and juicy, and had good eating quality. Its’ leaf size was similar with ‘Bartlett’ and smaller than ‘Whangkeumbae’. The average of full bloom date of ‘Greensis’ was determined as Apr. 26, which was six days later than ‘Whangkeumbae’ and similar with ‘Bartlett’. S genotypes of ‘Greensis’ were identified as S4Se by S-allele PCR product sequencing analysis. It seems that the S4 allele was inherited from ‘Whangkeumbae’ and the Se allele from ‘Bartlett’. ‘Greensis’ displayed strong resistance to scab disease caused by Venturia nashicola , similar to European pear cultivars like ‘Beurre Hardy’ and, ‘Conference’. ‘Greensis’ was also highly resistant to black leaf spot (Alternaria kikuchiana ) in the field.