World Library  
Flag as Inappropriate
Email this Article

Maloideae

Article Id: WHEBN0000054081
Reproduction Date:

Title: Maloideae  
Author: World Heritage Encyclopedia
Language: English
Subject: Rosaceae, Prunus, Sorbus rupicola, Amygdaloideae, Gymnosporangium
Collection:
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Maloideae

The Maloideae C.Weber was the apple subfamily, a grouping used by some taxonomists within the rose family, Rosaceae. Recent molecular phylogenetic evidence[1] has shown that the traditional Spiraeoideae and Amygdaloideae form part of the same clade as the traditional Maloideae, and the correct name for this group is Amygdaloideae. Earlier circumscriptions of Maloideae are more-or-less equivalent to subtribe Malinae or to tribe Maleae. The group includes a number of plants bearing commercially important fruits, such as apples and pears, while others are cultivated as ornamentals.

In its traditional circumscription[2] this subfamily consisted exclusively of shrubs and small trees characterised by a pome, a type of accessory fruit that does not occur in other Rosaceae, and by a basal haploid chromosome count of 17 (instead of 7, 8, or 9 as in the other Rosaceae), involving approximately 28 genera with approximately 1100 species worldwide, with most species occurring in the temperate Northern Hemisphere.

Taxonomy

The subfamily was given the name Pomoideae Juss. in 1789, but this name is no longer accepted under the nomenclature codes because it is not based on a genus name. It has also been separated into its own family the Malaceae Small[3] (formerly Pomaceae Lindl.).[4]

Recent molecular data have shown that the traditional subfamily Spiraeoideae is paraphyletic,[1][5] and to best reflect relationships subfamily Amygdaloideae has been expanded to include the former Spiraeoideae and Maloideae.[1]

An earlier intermediate classification[6] expanded Maloideae to include four genera with dry non-pome fruit. These are Kageneckia, Lindleya, and Vauquelinia, which have a haploid chromosome count of 15 or 17, and Gillenia, which is herbaceous and has a haploid chromosome count of 9.

A traditional circumscription of Maloideae includes the following genera:[2]
Amelanchier - serviceberry, juneberry
Aria (see Sorbus)
Aronia - chokeberry
Chaenomeles - Japanese quince
Chamaemeles
Chamaemespilus (see Sorbus chamaemespilus)
Cormus (see Sorbus)
Cotoneaster - cotoneaster
Crataegus - hawthorn
Cydonia - quince
Dichotomanthes
Docynia
Docyniopsis
Eriobotrya - loquat
Eriolobus
Hesperomeles
Heteromeles - toyon
Malacomeles
Malus - apple, crabapple
Mespilus - medlar
Osteomeles
Peraphyllum
Photinia
Pseudocydonia - Chinese quince
Pyracantha - firethorn
Pyrus - pear
Rhaphiolepis - hawthorn
Sorbus - rowan, whitebeam, service tree
Stranvaesia = Photinia pro parte
Torminalis (see Sorbus torminalis)

intergeneric hybrids:[7]
×Amelasorbus
×Crataegosorbus
×Crataemespilus
×Malosorbus
×Sorbocotoneaster
×Sorbopyrus

and graft hybrids:
+Crataegomespilus
+Pyrocydonia (Pirocydonia)

Notes

  1. ^ a b c Potter, D.; Eriksson, T.; Evans, R.C.; Oh, S.H.; Smedmark, J.E.E.; Morgan, D.R.; Kerr, M.; Robertson, K.R.; Arsenault, M.P.; Dickinson, T.A.; Campbell, C.S. (2007). Phylogeny and classification of Rosaceae. Plant Systematics and Evolution. 266(1–2): 5–43. doi:10.1007/s00606-007-0539-9
  2. ^ a b G. K. Schulze-Menz 1964. Reihe Rosales. in A. Engler's Syllabus der Pflanzenfamilien mit besonderer Berücksichtigung der Nutzpflanzen nebst einer Übersicht über die Florenreiche und Florengebiete der Erde, Gebrüder Borntraeger, Berlin
  3. ^ GRIN Taxonomy for Plants
  4. ^ Lindley, J. (1822). Observations on the natural group of plants called Pomaceae. Transactions of the Linnean Society of London. 13: 88–106.
  5. ^ Morgan, D.R.; Soltis, D.E.; Robertson, K.R. (1994). Systematic and evolutionary implications of rbcL sequence variation in Rosaceae. American Journal of Botany. 81(7): 890–903.
  6. ^ Evans, R. C., Campbell, C. S. (2002). "The origin of the apple subfamily (Maloideae; Rosaceae) is clarified by DNA sequence data from duplicated GBSSI genes". American Journal of Botany 89 (9): 1478–1484.  
  7. ^ Stace, C.A. 1975. Hybridization and the flora of the British Isles. Academic Press, London.

References

  • Joseph R. Rohrer, Kenneth R. Robinson, James B. Phipps - Floral Morphology of Maloideae (Rosaceae) and its systematic Relevance; American Journal of Botany, 81 (5), P. 574-581; 1994
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.