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Article: Characterization and analysis of North American Triticale Genetic Resources

TitleCharacterization and analysis of North American Triticale Genetic Resources
Authors
Issue Date1997
PublisherCrop Science Society of America. The Journal's web site is located at http://crop.scijournals.org
Citation
Crop Science, 1997, v. 37 n. 6, p. 1951-1959 How to Cite?
AbstractA collection of more than 3000 accessions of triticale (x Triticosecale Wittmack), called the North American Triticale Genetic Resources Collection (NATGRC), was assembled from 10 active and inactive breeding programs in the USA, Canada, and Mexico for the purposes of conservation, characterization, evaluation, and documentation. Since triticale has no wild ancestors and hybrid parentage is often unknown, preservation of unique gene combinations is essential for continued utilization. The origin groups that comprised the whole collection were evaluated in field plots for 2 yr at Davis, CA. Accessions were predominantly secondary hexaploid triticales having spring growth habit. The collection was classified for spike type and 38% has spikes typical of complete (Beagle type) and 30% were substituted (Armadillo type) triticale. The Shannon-Weaver diversity index (H'), computed for seven qualitative traits, was 1.275 for the whole collection. The most diverse group was from Manitoba (1.404) and the least diverse groups were from Oregon (0.822) and CIMMYT (0.867). Over-trait mean coefficients of variation for eight quantitative traits gave similar diversity ratings as H' for each of the origin groups (r = 0.74*), suggesting that simply scored traits may be useful for assessing overall diversity in large genetic resource collections. Principal components (PC) analysis of quantitative traits showed differentation, but considerable commonality, among the Canada, Mexico, and USA groups. The CA-Davis group included hybrid derivatives from CA-Jenkins x CIMMYT groups that clustered intermediate to those groups, suggesting a genetic basis for the phenotypic clustering. The PC analysis showed that the Beagle and Armadillo types differed in several quantitative traits, showing that this classification is a useful descriptor for hexaploid triticale. The NATGRC is conserved at USDA, Aberdeen, ID, and CIMMYT, Mexico. Researchers are urged to use and contribute to this collection. The formation of a European-based collection emphasizing winter growth habit is recommended.
Persistent Identifierhttp://hdl.handle.net/10722/68439
ISSN
2015 Impact Factor: 1.55
2015 SCImago Journal Rankings: 0.793
References

 

DC FieldValueLanguage
dc.contributor.authorFurman, BJen_HK
dc.contributor.authorQualset, COen_HK
dc.contributor.authorSkovmand, Ben_HK
dc.contributor.authorHeaton, JHen_HK
dc.contributor.authorCorke, Hen_HK
dc.contributor.authorWesenberg, DMen_HK
dc.date.accessioned2010-09-06T06:04:38Z-
dc.date.available2010-09-06T06:04:38Z-
dc.date.issued1997en_HK
dc.identifier.citationCrop Science, 1997, v. 37 n. 6, p. 1951-1959en_HK
dc.identifier.issn0011-183Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/68439-
dc.description.abstractA collection of more than 3000 accessions of triticale (x Triticosecale Wittmack), called the North American Triticale Genetic Resources Collection (NATGRC), was assembled from 10 active and inactive breeding programs in the USA, Canada, and Mexico for the purposes of conservation, characterization, evaluation, and documentation. Since triticale has no wild ancestors and hybrid parentage is often unknown, preservation of unique gene combinations is essential for continued utilization. The origin groups that comprised the whole collection were evaluated in field plots for 2 yr at Davis, CA. Accessions were predominantly secondary hexaploid triticales having spring growth habit. The collection was classified for spike type and 38% has spikes typical of complete (Beagle type) and 30% were substituted (Armadillo type) triticale. The Shannon-Weaver diversity index (H'), computed for seven qualitative traits, was 1.275 for the whole collection. The most diverse group was from Manitoba (1.404) and the least diverse groups were from Oregon (0.822) and CIMMYT (0.867). Over-trait mean coefficients of variation for eight quantitative traits gave similar diversity ratings as H' for each of the origin groups (r = 0.74*), suggesting that simply scored traits may be useful for assessing overall diversity in large genetic resource collections. Principal components (PC) analysis of quantitative traits showed differentation, but considerable commonality, among the Canada, Mexico, and USA groups. The CA-Davis group included hybrid derivatives from CA-Jenkins x CIMMYT groups that clustered intermediate to those groups, suggesting a genetic basis for the phenotypic clustering. The PC analysis showed that the Beagle and Armadillo types differed in several quantitative traits, showing that this classification is a useful descriptor for hexaploid triticale. The NATGRC is conserved at USDA, Aberdeen, ID, and CIMMYT, Mexico. Researchers are urged to use and contribute to this collection. The formation of a European-based collection emphasizing winter growth habit is recommended.en_HK
dc.languageengen_HK
dc.publisherCrop Science Society of America. The Journal's web site is located at http://crop.scijournals.orgen_HK
dc.relation.ispartofCrop Scienceen_HK
dc.titleCharacterization and analysis of North American Triticale Genetic Resourcesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0011-183X&volume=37&spage=1951&epage=1959&date=1997&atitle=Characterization+and+analysis+of+North+American+triticale+genetic+resourcesen_HK
dc.identifier.emailCorke, H: harold@hku.hken_HK
dc.identifier.authorityCorke, H=rp00688en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-0031449675en_HK
dc.identifier.hkuros31587en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0031449675&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume37en_HK
dc.identifier.issue6en_HK
dc.identifier.spage1951en_HK
dc.identifier.epage1959en_HK
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridFurman, BJ=7102606887en_HK
dc.identifier.scopusauthoridQualset, CO=6603851256en_HK
dc.identifier.scopusauthoridSkovmand, B=6602680022en_HK
dc.identifier.scopusauthoridHeaton, JH=7102998590en_HK
dc.identifier.scopusauthoridCorke, H=7007102942en_HK
dc.identifier.scopusauthoridWesenberg, DM=6603884209en_HK

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