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- Author:
- Lin, YinSheng; Wang, FaLin; Ma, ChunHui
- Source:
- Acta horticulturae 2002 no.587 pp. 195-200
- ISSN:
- 0567-7572
- Subject:
- Pyrus pyrifolia; branches; breeding; cultivars; drought; economics; flowers; frost; frost injury; frost resistance; fruits; humidity; parents; pears; temperature; winter; China; Japan
- Abstract:
- ... The paper illustrates the geographical, the geomorphologic and the climatic features and Pyrus plant resources of Gansu province of China. It is based on the investigation and study of the growth, fruit habit, phenophase, fruit economic character and the resistances to freezing injury, late frost, drought, salt damage, etc. of 50 cultivars of Pyrus pyrifolia Nakai including 28 pear cultivars of Ja ...
- DOI:
- 10.17660/ActaHortic.2002.587.22
-
http://dx.doi.org/10.17660/ActaHortic.2002.587.22
- Author:
- Kisaki, K.; Nishimoto, N.; Sano, K.; Kumamoto, O.; Hashiguchi, Y.; Sakaguchi, N.
- Source:
- Acta horticulturae 2002 no.587 pp. 413-418
- ISSN:
- 0567-7572
- Subject:
- harvest date; temperature; pollination; buds; flowering; sprouting; models; calcium cyanamide; budbreak; pears; trees; plastics; dormancy breaking; color; dormancy; branches; pollen; heat treatment; greenhouses
- Abstract:
- ... Earliest harvest of field-grown Japanese pears in Kagoshima prefecture occurs in late July to early August on 'Chikusui'. To further hasten the harvest time, forcing culture was tried under a heated plastic house and dormancy breaking treatments. Treatment with chemicals to break dormancy: Three-year-old 'Kousui' trees in 70-liter pots were utilized. The potted trees were moved into a glasshouse a ...
- DOI:
- 10.17660/ActaHortic.2002.587.55
-
http://dx.doi.org/10.17660/ActaHortic.2002.587.55
- Author:
- Lin, Shenghua; Fang, Chengquan; Song, Wenqin; Zhang, Feng
- Source:
- Acta horticulturae 2002 no.587 pp. 233-236
- ISSN:
- 0567-7572
- Subject:
- DNA; Pyrus; amplified fragment length polymorphism; cluster analysis; genetic distance; genetic markers; species identification; China
- Abstract:
- ... DNA molecular markers of 10 species of Pyrus were conducted with AFLP (Amplified Fragment Length Polymorphism) technique. The results indicated that 355 DNA fragments were amplified by using 6 pairs, 9 combinations of primers, in which 281 fragments presented polymorphism and accounted for 79.2% of the total fragment numbers. On average, 39 DNA fragments were produced by a pair of primers and this ...
- DOI:
- 10.17660/ActaHortic.2002.587.28
-
http://dx.doi.org/10.17660/ActaHortic.2002.587.28
- Author:
- Nasu, H.; Osaki, H.
- Source:
- Acta horticulturae 2002 no.587 pp. 665-668
- ISSN:
- 0567-7572
- Subject:
- bark; deformation; fruits; leaves; necrosis; pears; rootstocks; shoots; trees; Japan
- Abstract:
- ... A disease of Japanese pear which induces rough bark of shoots and deformation of fruits was found in the Okayama Prefecture in Japan. The symptoms are mainly wavy leaves, rough-surfaces with bark necroses of shoots and deformation of fruits. The symptoms on the shoots and fruits appeared within 2~3 years of Japanese pear cvs. Niitaka, Atago and Housui being top-grafted onto affected trees of the p ...
- DOI:
- 10.17660/ActaHortic.2002.587.88
-
http://dx.doi.org/10.17660/ActaHortic.2002.587.88
- Author:
- Tabuchi, T.; Ito, S.; Toita, S.; Inoue, K.; Murata, K.; Shimura, I.
- Source:
- Acta horticulturae 2002 no.587 pp. 539-542
- ISSN:
- 0567-7572
- Subject:
- cell walls; ethephon; fruit drop; pears; peduncle
- Abstract:
- ... Abscission layer formation and development of Japanese pear fruit was investigated anatomically using applications of ethephon. At 30 days after application with ethephon, cell walls of the juncture tissue between the peduncle and spur were disintegrated. These responses were found initially in the epidermis and cortex regions. At 40 days after application with ethephon, intercellular cavities wer ...
- DOI:
- 10.17660/ActaHortic.2002.587.70
-
http://dx.doi.org/10.17660/ActaHortic.2002.587.70
- Author:
- Honjo, H.; Kobayashi, Y.; Watanabe, M.; Fukui, R.; Sugiura, T.
- Source:
- Acta horticulturae 2002 no.587 pp. 389-395
- ISSN:
- 0567-7572
- Subject:
- canopy; flowering; mulching; pears; sprouting; temperature; tree crown; trees
- Abstract:
- ... This study was conducted to develop the method of controlling the flowering date of Japanese pear (cvs. Kousui and Housui). The covering methods with reflective film (Du Pont, Tyvek) were used. Exp.1: In early November, 1998, 40 trees each were used for 4 treatments; 1) covered above the top of the trees, 2) mulched under the trees, 3) covered above and under the trees and 4) control. Exp.2: In ea ...
- DOI:
- 10.17660/ActaHortic.2002.587.52
-
http://dx.doi.org/10.17660/ActaHortic.2002.587.52
- Author:
- Sui, Hongtao.; Li, Juncai; Liu, Cheng; Wang, Jiazhen
- Source:
- Acta horticulturae 2002 no.587 pp. 291-297
- ISSN:
- 0567-7572
- Subject:
- Pyrus communis; Venturia pirina; calyx; color; crossing; flavor; fruits; new variety; pears; ripening; sugars; trees; vigor; China
- Abstract:
- ... Most Asian pears are green or brown with light flavor. The new variety of pear 'Golden Pearl', selected from a crossing of Pyrus communis L. 'Bartlett' × P. bretschneideri Rehd. 'Hongxiaoli', is large, red and crisp with good flavor. The fruit of Golden Pearl pear is large, average 224g. It is short spindle, and the surface color is bright red on the top with a light-yellow ground color. The stalk ...
- DOI:
- 10.17660/ActaHortic.2002.587.37
-
http://dx.doi.org/10.17660/ActaHortic.2002.587.37
- Author:
- Motomura, Y.
- Source:
- Acta horticulturae 2002 no.587 pp. 525-532
- ISSN:
- 0567-7572
- Subject:
- alcohols; antioxidant activity; apples; ascorbic acid; cell wall components; cultivars; esterification; free radical scavengers; lemons; linoleic acid; oxidation; pears; pectins; temperature; water solubility
- Abstract:
- ... Water-soluble and hot water-soluble pectic fractions, extracted from alcohol insoluble solid (AIS) of fruit flesh of eight cultivars of Asian pear, acted as antioxidants against ascorbic acid oxidation, while HCl-soluble pectic fractions showed no effect. The activity was higher in hot water-soluble fractions than water-soluble fractions. Pectins from apples and lemons demonstrated antioxidant act ...
- DOI:
- 10.17660/ActaHortic.2002.587.68
-
http://dx.doi.org/10.17660/ActaHortic.2002.587.68
- Author:
- La Franchie, E.J.
- Source:
- Acta horticulturae 2002 no.587 pp. 599-604
- ISSN:
- 0567-7572
- Subject:
- Apoidea; apples; crabs; cultivars; exports; flowering; flowers; fruit set; germination; growers; pears; pellets; pollen; self-pollination; viability; New Zealand
- Abstract:
- ... New Zealand Asian Pear/nashi growers have experienced variable crop loads between years in the export cultivar 'Housui'. Normal practice is for pollination to be achieved via bees placed in the orchard during flowering. The purpose of this study was to determine which pollen type would be an effective pollen source for 'Housui' if artificial pollen were to be applied. Pollen was applied to bagged ...
- DOI:
- 10.17660/ActaHortic.2002.587.79
-
http://dx.doi.org/10.17660/ActaHortic.2002.587.79
- Author:
- Yoneyama, K.; Makita, M.
- Source:
- Acta horticulturae 2002 no.587 pp. 147-150
- ISSN:
- 0567-7572
- Subject:
- Pyrus; cultivars; ecology; fruits; highlands; indigenous species; mountains; pastures; roads; trees; villages; Japan
- Abstract:
- ... This paper reports the ecology and distribution of Iwateyamanashi, which has been little known thus far, based on the investigation conducted in the Kitakami Highlands in Iwate Prefecture, Japan, approx. Lat. 40°N. Most Iwateyamanashi trees were found at about 400m above sea level. No trees were seen at 700m above the sea or higher. The trees spotted all stood on their own in villages and pastures ...
- DOI:
- 10.17660/ActaHortic.2002.587.15
-
http://dx.doi.org/10.17660/ActaHortic.2002.587.15
- Author:
- Nee, Cheng-chu; Tsai, Chung-han; Anstine, Daniel D.
- Source:
- Acta horticulturae 2002 no.587 pp. 61-69
- ISSN:
- 0567-7572
- Subject:
- Erwinia amylovora; Pyrus pyrifolia; breeding; buds; clones; cultivars; disease control; extinction; flowers; germplasm; indigenous species; industry; land use; markets; pears; rootstocks; temperate zones; trees; China; Japan; Korean Peninsula; Taiwan; United States
- Abstract:
- ... An estimated 72% of all known pear species are native to Asia. The United States houses 1,500 clones, 40 % of these holdings are Asian pear cultivars. Land development throughout Asia poses a serious threat to indigenous Asian pear species. Some of these are facing extinction, i.e. P. koehnei. It is an imperative that Asian countries cooperate in a germplasm protection and preservation research ve ...
- DOI:
- 10.17660/ActaHortic.2002.587.3
-
http://dx.doi.org/10.17660/ActaHortic.2002.587.3
- Author:
- Subhadrabandhu, Suranant; Prapthuk, Wirat; Thanaruj, Chinnapan
- Source:
- Acta horticulturae 2002 no.587 pp. 89-96
- ISSN:
- 0567-7572
- Subject:
- breeding; budbreak; buds; chilling requirement; climate; composts; cooling; development projects; disease control; dormancy; dormancy breaking; flowering; fruits; growers; harvesting; highlands; industrialization; irrigation; markets; packaging; pears; pests; researchers; rootstocks; trees; villages; China; India; Japan; Korean Peninsula; Myanmar; Thailand
- Abstract:
- ... Asian pear production in Thailand is very small compared with the production in some Asian countries, like Korea, Japan, China and India. In the South East Asian region, Thailand and Myanmar grow the Asian pear. The production of Asian pear in Thailand is confined to the highland areas in northern Thailand, where the climate is rather mild and a period of chilling occurs in winter to break bud dor ...
- DOI:
- 10.17660/ActaHortic.2002.587.6
-
http://dx.doi.org/10.17660/ActaHortic.2002.587.6
- Author:
- White, Allan
- Source:
- Acta horticulturae 2002 no.587 pp. 107-111
- ISSN:
- 0567-7572
- Subject:
- breeding; markets; new variety; pears; raw fruit; Australia; Europe; New Zealand; United States
- Abstract:
- ... Asian pear is a minor crop in New Zealand and Australia with areas of 150 hectares in New Zealand and 500 hectares in Australia. Most of the production in New Zealand is exported to the USA and Europe as fresh fruit whereas in Australia most of their production is sold on the local market. The main variety in New Zealand is Housui and in Australia, Nijisseiki. Research in New Zealand is focused on ...
- DOI:
- 10.17660/ActaHortic.2002.587.8
-
http://dx.doi.org/10.17660/ActaHortic.2002.587.8
- Author:
- Li, Thomas S.C.
- Source:
- Acta horticulturae 2002 no.587 pp. 129-131
- ISSN:
- 0567-7572
- Subject:
- alternative crops; crop management; farmers; orchards; pears; postharvest treatment; prices; British Columbia
- Abstract:
- ... Demand and prices for Asian pears increased rapidly in recent years which promoted Asian pear cultivation in Canada. The results of variety trails in British Columbia indicated that Asian pears can be cultivated with similar crop management as European pears except extra caution is needed during harvest and post-harvest handling. It is a promising new alternative crop with high economic values for ...
- DOI:
- 10.17660/ActaHortic.2002.587.12
-
http://dx.doi.org/10.17660/ActaHortic.2002.587.12
- Author:
- Chijiwa, H.; Hayashi, K.; Ushijima, K.
- Source:
- Acta horticulturae 2002 no.587 pp. 685-689
- ISSN:
- 0567-7572
- Subject:
- Pyrus pyrifolia; fruit quality; harvesting; pears; prediction; specific gravity; texture
- Abstract:
- ... The pithiness called 'suiri' in Japanese pear fruit is one of the most serious physiological disorders that deteriorates flesh texture. A simple diagnosis of the pithy fruit using specific gravity and an incidence prediction method of pithiness was devised. The symptom arose when the specific gravity of the fruit dropped under 0.95 and the degree of pithiness increased with the further decrease of ...
- DOI:
- 10.17660/ActaHortic.2002.587.91
-
http://dx.doi.org/10.17660/ActaHortic.2002.587.91
- Author:
- Teng, Yuanwen; Tanabe, Kenji; Tamura, Fumio; Itai, Akihiro
- Source:
- Acta horticulturae 2002 no.587 pp. 139-145
- ISSN:
- 0567-7572
- Subject:
- cluster analysis; cultivars; genetic relationships; genetic variation; pears; random amplified polymorphic DNA technique; sand; China; Japan; Korean Peninsula
- Abstract:
- ... A total of 92 pear accessions mainly native to East Asia were subjected to RAPD analysis to evaluate genetic variation and relationships among the accessions. Cultivars of P. communis were quite distinct from Asian pear cultivars. Cluster analysis identified five major groups. Chinese white pears clustered together with Chinese sand pears. The majority of Japanese pear cultivars fell into one majo ...
- DOI:
- 10.17660/ActaHortic.2002.587.14
-
http://dx.doi.org/10.17660/ActaHortic.2002.587.14
- Author:
- Fang, Chengquan; Chen, Xinye; Lin, Shenghua
- Source:
- Acta horticulturae 2002 no.587 pp. 285-290
- ISSN:
- 0567-7572
- Subject:
- Pyrus bretschneideri; cold tolerance; cultivars; disease resistance; fruit quality; interspecific hybridization; pears; pedigree; ripening; spraying; suberization; trees
- Abstract:
- ... ‘Huasu’ is a new, an early maturing, high quality, high yield and disease-resistant pear cultivar from interspecific hybridization of ‘Zaosu’ (Pyrus bretschneideri) × ‘Yakumo’ (P. pyrifolia). The fruit ripens 10~15 days earlier than ‘Zaosu’. The fruit is about 200~250g in weight on average, round in shape with yellowish green skin. The flesh is yellowish white, fine, crisp, juicy, sour-sweet, pala ...
- DOI:
- 10.17660/ActaHortic.2002.587.36
-
http://dx.doi.org/10.17660/ActaHortic.2002.587.36
- Author:
- Hwang, Hae-Sung; Shin, Il-Sheob; Kim, Whee-Cheon; Cho, Hyun-Mo; Shin, Yong-Uk; Hwang, Jeong-Hwan
- Source:
- Acta horticulturae 2002 no.587 pp. 299-306
- ISSN:
- 0567-7572
- Subject:
- fresh market; harvest date; cultivars; tree growth; total soluble solids; Alternaria; breeding; Pyrus pyrifolia; pears; fruit quality; trees; color; ripening; markets
- Abstract:
- ... Shincheon pear (Pyrus pyrifolia Nakai) originated as a cross between Niitaka (non-patented, released in 1929) and Chuwhangbae (patented, released in 1985). In 1998, Shincheon was released as a high quality, early-season pear for the fresh market by the National Horticultural Research Institute (NHRI) in Suwon. This cultivar was first selected in 1996, and its regional adaptability was checked out ...
- DOI:
- 10.17660/ActaHortic.2002.587.39
-
http://dx.doi.org/10.17660/ActaHortic.2002.587.39
- Author:
- Shibata, K.; Kawashima, K.; Hishitani, M.
- Source:
- Acta horticulturae 2002 no.587 pp. 319-321
- ISSN:
- 0567-7572
- Subject:
- Pyrus pyrifolia; acidity; breeding; brix; buds; cultivars; flowering; flowers; horticulture; pears; taste; temperature; trees
- Abstract:
- ... Japanese pear (Pyrus pyrifolia Nakai) cultivar 'Akemizu' was bred from a cross of 'Shinsui' × '42-6' at the Kanagawa Horticultural Experimental Station. 'Akemizu' is an early-maturing cultivar which is harvested a week to ten days earlier than 'Shinsui'. The skin is yellowish red brown, and the fruit is round, averaging 320 g. The fruit features a Brix of roughly 13%, with slight acidity and fine, ...
- DOI:
- 10.17660/ActaHortic.2002.587.43
-
http://dx.doi.org/10.17660/ActaHortic.2002.587.43
- Author:
- Peng, S.A.; Li, G.H.; Luo, C.
- Source:
- Acta horticulturae 2002 no.587 pp. 505-509
- ISSN:
- 0567-7572
- Subject:
- Pyrus pyrifolia; calcium; cultivars; early development; fruiting; pears
- Abstract:
- ... Changes of Ca and calmodulin (CaM) contents were analyzed in two pear cultivars, 'Shinseiki' and 'Syounan' that differed markedly in maturity and storage between each other. The results showed that a high content of Ca appeared during young fruit development in both cultivars, but on the whole, Ca content during different stages in 'Shinseiki' with early maturity and inferior storage characteristi ...
- DOI:
- 10.17660/ActaHortic.2002.587.65
-
http://dx.doi.org/10.17660/ActaHortic.2002.587.65