Details for: PI 706720, Pyrus communis L., US-Mich 437


Summary Data
Taxonomy:
Pyrus communis L.
Top Name:
US-Mich 437
Origin:
Developed – West Virginia, United States
Received by NPGS:
Feb 2025
Improvement Status:
Breeding material
Form Received:
Scion
Life Form:
Tree
Availability
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Core Passport Data
Taxonomy:
Pyrus communis L.
Top Name:
US-Mich 437
Origin:
Developed – West Virginia, United States
Received by NPGS:
Feb 2025
Improvement Status:
Breeding material
Form Received:
Scion
Life Form:
Tree
Source History
Developed
February 2025.
West Virginia, United States
Coordinates: 39.3463, -77.8821 (Map it)
Elevation: 182m.

Developer(s):
Accession Names and Identifiers
US-Mich 437
Type: Developer identifier
Group: BREEDING GERMPLASM
enhanced crosses or advanced selections

US-Michigan 437
Type: Developer identifier
Group: OTHERNUM
other identifier

CPYR 3171
Type: Site identifier
Group: LOCAL
Corvallis local number

Mich-US 437
Type: Developer identifier
Group: OTHERNUM
other identifier

Narrative
Important breeding selection from USDA Michigan. Between 1916 and 1919, a cooperative breeding program between USDA and the Michigan Agricultural Experiment Station (established by Michigan Agriculture College, now known as Michigan State University) in South Haven, MI was initiated (Magness, 1937; van der Zwet and Keil, 1979). It was led by USDA Botanists William F. Wight and Don Ward along with graduate student Stanley Johnston (later a Michigan State University professor) (Magness, 1937; van der Zwet and Keil, 1979). The aim of this program was to intercross pear germplasm with moderate fire blight resistance with high fruit quality pears. The most impactful crosses were generated from seedlings of ‘Barseck’ ([‘Bartlett’ × ‘Seckel’] × ‘Barlett’). The breeding line Mich-US 437, believed to be ‘Barseck’ × ‘Barlett’ was produced and was featured prominently as a parent in the later USDA breeding program (van der Zwet and Keil, 1979). As with ‘Waite’, genotyping analyses found that Mich-US 437 is actually ‘Vermont Beauty’ × ‘Barlett’ (Montanari et al., 2020) (Supplementary Figure 2), with ‘Vermont Beauty’ a descendant of ‘Seckel’ and ‘White Doyenné’, a parent of ‘Bartlett’ (Montanari et al., 2020). Quote from Gottschalk et al. 2024. Direction of cross is unknown.
Pyrus communis L.
Genus:
Pyrus
Section:
Pyrus
Family:
Rosaceae
Subfamily:
Amygdaloideae
Tribe:
Maleae
Subtribe:
Malinae
Nomen number:

30474
Place of publication:

Sp. pl. 1:479, 2:1200. 1753
Comment:
probably of hybrid origin
Verified:
07/07/2011 by ARS Systematic Botanists.
Other conspecific taxa
Pyrus communis L. subsp. caucasica (Fed.) Browicz (77 active accession[s])
Pyrus communis L. subsp. communis (39 active accession[s])
Pyrus communis L. subsp. pyraster (L.) Ehrh. (113 active accession[s])
Autonyms (not in current use), synonyms and invalid designations
Heterotypic Synonym(s)
Pyrus asiae-mediae (Popov) Maleev
Pyrus balansae Decne.
Pyrus bourgaeana Decne.
Pyrus communis L. subsp. bourgaeana (Decne.) Nyman
Pyrus communis L. var. mariana Willk.
Pyrus domestica Medik.
Pyrus elata Rubtzov
Pyrus medvedevii Rubtzov

Common names
LanguageNameAlternate namenoteseqCitation
Englishpear  1Wiersema, J. H. & B. León. 1999. World economic plants: a standard reference CRC Press, Boca Raton, FL.
Frenchpoirier  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
GermanBirnbaum  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
GermanBirne  2Reichel, S. 1998. pers. comm. Note: re. German common names
GermanBirnenbaum  2Reichel, S. 1998. pers. comm. Note: re. German common names
Italianpera  2Hanelt, P., ed. 2001. Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6
Italianpero  2Hanelt, P., ed. 2001. Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6
Japanese Rōmajiseiyō-nashi  2Ohwi, J. 1965. Flora of Japan (Engl. ed.).
Portuguesepereira  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
Spanishpera  2Hanelt, P., ed. 2001. Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6
Spanishperal  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
Swedishpäron  2Aldén, B., S. Ryman, & M. Hjertson. 2012. Svensk Kulturväxtdatabas, SKUD (Swedish Cultivated and Utility Plants Database; online resource)
Transcribed Chinesexi yang li as Pyrus communis var. sativa2Wu Zheng-yi & P. H. Raven et al., eds. 1994-. Flora of China (English edition). Note: = Pyrus communis var. sativa
Transcribed Koreanbyeongbaenamu  2Mun-Chan, B. et al. 1986. A checklist of the Korean cultivated plants. Kulturpflanze 34:122.
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Pedigree
Female external name:
Vermont Beauty
Male external name:
Bartlett
Pollination type:
CONTROLLED
Description:
Vermont Beauty x Bartlett