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Zhengwang Jiang, Feiyan Tang, Hongwen Huang, Hongju Hu, and Qiliang Chen

The sand pear ( Pyrus pyrifolia Nakai) is one of the most important fruit tree crops in China and is extensively cultivated in central and southwest China. The species occurs naturally in southern and western China, recognized as the center of

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Yan-xin Duan, Ying Xu, Ran Wang, and Chun-hui Ma

‘Akizuki’ ( Pyrus pyrifolia Nakai), a Japanese pear, plays an important role in pear production in China because of its good quality characteristics such as large fruit, pretty shape, delicate pulp. and high soluble solid content. However, with the

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Dongfeng Liu, Junbei Ni, Ruiyuan Wu, and Yuanwen Teng

activity and gene expression. Fig. 1. Temperature schedule for high-temperature treatment during late stage of fruit enlargement in Pyrus pyrifolia ‘Wonhwang’. ( A ) Daily high temperature (40 °C) from 1200 to 1500 hr for high-temperature treatment. ( B

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Zhong-Bin Wu, Hsin-Mei Ku, Yuh-Kun Chen, Chung-Jan Chang, and Fuh-Jyh Jan

information on the molecular variability and phylogenetic relationship among ACLSV populations. Materials and Methods Virus isolation and maintenance. Leaves of the pear cultivar Hengshen ( Pyrus pyrifolia var. Hengshen) showing symptoms of

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Akihiro Itai, Takaaki Igori, Naoko Fujita, Mayumi Egusa, Motoichiro Kodama, and Hideki Murayama

concomitant with gene expression of ethylene biosynthetic enzymes. Materials and Methods Plant material. Japanese pear ( Pyrus pyrifolia Nakai) ‘Nijisseiki’ was grown at the Tottori University orchard. Immature leaves were detached and transferred to the

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Chun-hui Shi, Xiao-qing Wang, Xue-ying Zhang, Lian-ying Shen, Jun Luo, and Yu-xing Zhang

Fruit color is a commercially important quality for sand pear ( Pyrus pyrifolia Nakai). Sand pear can be divided into russet, semi-russet, and green types based on the color of the peel, which is typically composed of a cuticle layer, an epidermis

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Sogo Nishio, Masahiko Yamada, Yutaka Sawamura, Norio Takada, and Toshihiro Saito

Inheritance of ripening time of fruit of Japanese pear ( Pyrus pyrifolia Nakai) Jpn. J. Breed. 43 289 298 Bell, R.L. Janick, J. 1990 Quantitative genetic analysis of fruit quality in pear J. Amer. Soc. Hort. Sci. 115 829 834 Campbell, R.C. 1974 Statistics for

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Daisuke Sakamoto, Shinnosuke Kusaba, and Yuri Nakamura

, Q. Qian, M. Teng, Y. 2015 Effects of exogenous application of GA 4+7 and N-(2-chloro-4-pyridyl)-N′-phenylurea on induced parthenocarpy and fruit quality in Pyrus pyrifolia ‘Cuiguan’ Plant Growth Regulat. 76 251 258 Ohara, H. Sakamoto, D. Ohkawa, K

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Jae-Young Lee*, Yong-Koo Kim, and Hee-Seung Park

To maintain appropriate tree shapes for Asian pear trees, multi-leader system would be more suitable, which could be obtained from the proper training systems. Controlling apical dominance should be the major factor for tree shape management and this might be modified by branch bending or pruning methods. When the tree shape was managed with Alternate Fan System, too narrower branch angle depressed flower bud formation because of the vigorous shoot growth but too wider angle also decreased that formation because of the numerous water sprouts. The tree with 75 degrees of internally deviated angle performed superior result in fruiting process. Additionally, heading-back pruning could be another for water sprout emerging. For that reason, the severer heading-back pruning stimulated the more water sprout emerging. The proper pruning method could be obtained by considering the relation between main stem width and sum of remained branch width.

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Wol-Soo Kim and Jung-An Jo

Many trials to supply germanium to fruit have been carried out since tests have confirmed germanium's role as a medical substance. Supplying germanium in orchards by soil and foliar application was not effective because of loss from rainfall. In order to increase germanium absorption by fruit, this study carried out tree trunk injections during the growing season. Two types of germanium, GeO (inorganic type) and Ge-132 (organic type), in concentrations of 5, 10, 25, and 50 mg·L–1 were supplied to `Niitaka' pear trees by trunk injection (1.5 L/tree), four times at 15-day intervals from June 2004. The treatment with 50 mg·L–1 GeO showed decreased fruit weight, but 50 mg·L–1 Ge-132 showed no difference to the control and other treatments. Fruit lenticels were increased in size by all of the Ge treatments in comparison to control fruit. Soluble solids as well as Hunter value `a' of the fruits of all Ge treatments were higher than that of the control. Flesh browning after peeling the fruit was delayed by the germanium treatment, and polyphenoloxidase (PPO) activities were lowered. Postharvest potentials were maintained at high levels for fruit firmness, physiological disorders, and decayed fruit during cold storage at 0 to 1 °C for 2 months.