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useful molecular markers. The efficiency of detecting molecular markers associated with a target trait depends on broad-sense heritability in QTL analysis in addition to the genetic marker density on linkage maps ( Ukai, 2000 ). Japanese pear ( Pyrus

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the effect of lignin on the quality of chinese white pear fruit ( Pyrus bretschneideri ). Stone cells, formed by the accumulation of lignin and other substances, represent one crucial factor that affects the taste of fruit ( Rogers and Campbell, 2004

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., 2014 , 2015 ). 1-MCP inhibits CHL activity and maintains green color in vegetables and fruit ( Chen et al., 2009 ; Gong and Mattheis, 2003 ). Recent studies indicate that 1-MCP can delay chlorophyll degradation in asian pears ( Pyrus bretschneideri

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( Fortunella sp.), loquat ( Eriobotrya japonica ), blueberry ( Vaccinium sp.), blackberry ( Rubus subgenus Rubus ), grape ( Vitis sp.), muscadine ( Vitis rotundifolia ), passion fruit ( Passiflora sp.), fig ( Ficus carica ), and pear ( Pyrus communis

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), and Western Oregon ( Hemphill et al., 1992 ). Fire blight [ Erwinia amylovora (Burr.)] is a major limiting problem in the production of european pears ( Pyrus communis L.) in the western United States. Fire blight–resistant european pears often are

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Yield components of 8- to 10-year-old trees were compared among `Kieffer' [Pyrus communis (L.) x Pyrus pyrifolia (Burro.)] and `Harrow Delight' and `Harvest Queen' [Pyrus communis (L.)]. `Kieffer' set more fruit than the other cultivars, even though flower density was similar. `Kieffer' also had similar size or larger fruit than `Harrow Delight' or `Harvest Queen'. Path analysis showed that the direct and indirect effect of fruit number on yield was important for all cultivars. Flower density only had a small direct effect on yield and this was at times negative. Fruit size had a small effect on yield when compared to fruit number.

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.J. Zhang, X.F. Wang, R. Yang, S.L. 2015 Expression analysis of lignin-associated genes in hard end pear ( Pyrus pyrifolia Whangkeumbae) and its response to calcium chloride treatment conditions J. Plant Growth Regul. 34 251 262 Ma, H.C. 2010 Studies on

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Abstract

Various concentrations of salicylhydroxamic acid and alpha, alpha-dipyridyl (reported inhibitors of cyanide-insensitive respiration) applied to fruit of ‘Bose’ pear (Pyrus communis L.) reduced fruit softening. The application of silver ions, reported to inhibit ethylene action, delayed ripening.

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Abstract

Treatment with 2-mercaptobenzothiazole (MBT) inhibited the friction discoloration of fruit of ‘d’Anjou’ pear (Pyrus communis L.). The inhibition was apparently due to inactivation of the pear polyphenoloxidase.

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Abstract

Repeated winter rain or water soaking in the laboratory reduced the time required for breaking winter rest of ‘Bartlett’ pear (Pyrus communis L.) and ‘Starkrimson’ apple (Malus domestica Borkh.). Possibly a water soluble inhibitor is leached from the buds.

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