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Pyrus

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Wild Crop Relatives: Genomic and Breeding Resources

Abstract

Species of the genus Pyrus, commonly referred to as pears, are pome fruits related to apples and quince. There are at least 26 widely recognized primary species and 10 naturally occurring interspecific hybrid taxa, which are distributed in Europe, temperate Asia, and mountainous areas of northern Africa. There is little well-documented information on the conservation status of pear species, although several taxa are listed in the IUCN Red List. Conservation efforts tend to be mostly in ex situ collections of cultivars, and more seed collection from wild populations is desirable. All species of Pyrus are intercrossable and there are no major incompatibility barriers to . There are four main cultivated species, which have been the focus of most intra- and interspecific hybridization for the development of scion cultivars. However, several other species are sources of valuable traits, principally for the development of rootstocks, or directly for ornamental cultivars. Intergeneric hybridization is difficult and hybrid lethality and low fertility of the hybrids is common. However, ×Sorbopyrus auricularis is a naturally occurring intergeneric hybrid of mountain ash and pear, and ×Pyronia veitchii is a hybrid of Pyrus pyrifolia and Cydonia oblonga. Various apple × pear hybrids have also been produced, especially when special techniques such as embryo rescue are used.

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Authors and Affiliations

  1. United States Department of Agriculture, Agricultural Research Service, Appalachian Fruit Research Station, Kearneysville, WV, 25430, USA

    Richard L. Bell

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  1. Richard L. Bell
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  2. Akihiro Itai
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Correspondence to Richard L. Bell .

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Editors and Affiliations

  1. Institute of Nutraceutical Research, Clemson University, Jordan Hall 109, Clemson, 29634, South Carolina, USA

    Chittaranjan Kole

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© 2011 Springer-Verlag Berlin Heidelberg

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Bell, R.L., Itai, A. (2011). Pyrus. In: Kole, C. (eds) Wild Crop Relatives: Genomic and Breeding Resources. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-16057-8_8

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