On some relationships between <i>Avena sativa</i> and <i>A. fatua</i> (Gramineae) as studied from Canadian material

Baum, Bernard R.

doi:10.1139/b68-135

Cited by 15 publications

(6 citation statements)

References 12 publications

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“…Yet despite these similarities, this study has also highlighted several features of genome organisation (e.g., the Type II translocation) that show this accession of A. fatua to be genetically distinct from the other hexaploids studied. If the Type II translocation is found to be conserved in other A. fatua accessions then, from a taxonomic perspective, this information combined with more traditional morphological evidence adds further support to the recommendation by Baum (1968) that the full specific status of A. fatua is valid and should be retained.…”

Section: Resultsmentioning

confidence: 65%

“…Second, the hybridisation of this tetraploid with a third diploid species to form a triploid, which then underwent a second cycle of chromosome doubling to produce the hexaploid (Thomas 1992). Based on a similar genomic composition and the observation that all hexaploid taxa are interfertile, it has been suggested that they may all belong to a single biological species (Ladizinsky and Zohary 1971), although Baum (1968) concluded that A. sativa and A. fatua deserved the rank of species based on detailed morphological analysis.…”

Section: Introductionmentioning

confidence: 99%

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Genome structure and evolution in the allohexaploid weed Avena fatua L. (Poaceae)

Yang

Hanson²,

Bennett³

et al. 1999

Genome

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Allohexaploid wild oat, Avena fatua L. (Poaceae; 2n = 6x = 42), is one of the world's worst weeds, yet unlike some of the other Avena hexaploids, its genomic structure has been relatively little researched. Consequently, in situ hybridisation was carried out on one accession of A. fatua using an 18S-25S ribosomal DNA (rDNA) sequence and genomic DNA from A. strigosa (AA-genome diploid) and A. clauda (CC-genome diploid) as probes. Comparing these results with those for other hexaploids studied previously: (i) confirmed that the genomic composition of A. fatua was similar to the other hexaploid Avena taxa (i.e., AACCDD), (ii) identified major sites of rDNA on three pairs of A/D-genome chromosomes, in common with other Avena hexaploids, and (iii) revealed eight chromosome pairs carrying intergenomic translocations between the A/D- and C-genomes in the accession studied. Based on karyotype structure, the identity of some of these recombinant chromosomes was proposed, and this showed that some of these could be divided into two types, (i) those common to all hexaploid Avena species analysed (3 translocations) and (ii) one translocation in this A. fatua accession not previously observed in reports on other hexaploid Avena species. If this translocation is found to be unique to A. fatua, then this information, combined with more traditional morphological data, will add support to the view that A. fatua is genetically distinct from other hexaploid Avena species and thus should retain its full specific status.

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Section: Resultsmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Genome structure and evolution in the allohexaploid weed Avena fatua L. (Poaceae)

Yang

Hanson²,

Bennett³

et al. 1999

Genome

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“…The variable colours of the seeds of A. fatua can be contrasted with the yellowish-white seeds of A. sativa, and the characteristic seed dormancy of A. fatua with near absence of dormancy in the cultivar. Baum (1968) was cited on less visible differences in the lodicules and epiblasts. The lodicule of A. sativa is distinguished by an attached side lobe, which is absent in A. fatua.…”

Section: Description and Account Of Variationmentioning

confidence: 99%

The Biology of Canadian Weeds. 27.Avena fatuaL. (updated)

Beckie

FrancisArdath²,

HallLinda

2012

Can. J. Plant Sci.

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L. M. 2012. The Biology of Canadian Weeds. 27. Avena fatua L. (Updated). Can. J. Plant Sci. 92:1329Á1357. An updated review of biological information is provided for Avena fatua. A widespread species originating in Eurasia, A. fatua is one of the 10 worst annual weeds of temperate agricultural regions of the world. Key weediness traits of this highly selfing species include fecundity, seed shatter, and a large and persistent seed bank with variable degrees of primary seed dormancy. The species occurs in all Canadian provinces and most states in the USA. In Canada, it is most troublesome as a weed in the prairies, where it has spread throughout crop areas in all climatic zones. Depending upon plant density and relative time of emergence, A. fatua competition may reduce annual crop yields by as much as 70%. First cohort emergence of A. fatua coincides with planting and emergence of spring-seeded crops, although additional cohorts can emerge throughout the growing season. Avena fatua is more abundant in zerothan intensive-tillage systems; the former regime promotes earlier and greater emergence because of a shallower and less persistent seed bank. Despite the introduction of highly efficacious herbicides in the 1970s and 1980s, abundance of the species has not declined across the Canadian prairies or elsewhere. The continual evolution of herbicide-resistant A. fatua populations, seed spread via farm machinery, and limited herbicide modes of action for its control threaten sustained annual field crop production in many temperate agricultural areas. Further adoption and integration of multiple non-herbicidal weed management practices, such as enhanced crop seeding rate, competitive crops and cultivars, and precision fertilizer placement, should help mitigate A. fatua interference. The species has some beneficial uses as an alternative feed and food constituent or industrial feedstock, as well as potential in cultivated oat (Avena sativa L.) improvement. Key words: Avena fatua, wild oat, folle avoine, weed biology Beckie, H. J., Francis, A. et Hall, L. M. 2012. La biologie des mauvaises herbes au Canada. 27. Avena fatua L. (mise aj our). Can. J. Plant Sci. 92: 1329Á1357. L'article propose une mise au point sur la biologie d'Avena fatua. Espe`ce d'Eurasie largement re´pandue, la folle avoine figure parmi les dix pires adventices annuelles dans les re´gions agricoles ac limat tempe´re´du monde.Les principaux caracte`res qui font de cette espe`ce autofe´conde´e une mauvaise herbe sont la fe´condite´, l'e´gre`nement et un important re´servoir de graines persistantes a`dormance primaire de degre´variable. La folle avoine existe dans toutes les provinces du Canada et dans la majorite´des É tats ame´ricains. Au Canada, elle s'ave`re particulie`rement proble´matique dans les Prairies, ou`elle a gagne´les re´gions cultive´es de toutes les zones climatiques. Selon la densite´du peuplement et le moment relatif ou`a lieu la leve´e, A. fatua peut re´duire le rendement des cultures annuelles de jusqu'a`70 %. La germination de la pre...

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“…The lodicule of the cultivated oats is of the Sativa-type (Baum, 1968). Only a very small number of lodicules were of the Fatua-type and were interpreted as A. sativa X fatua (or sterilis) F1 hybrids or F1-like phenotypes (Baum, 1968, and1969a). The great majority of lodicules in the 5000 samples were of the Sativatype.…”

Section: The Paleamentioning

confidence: 99%

On some relationships between Avena sativa and A. fatua (Gramineae) as studied from Canadian material

Cited by 15 publications

References 12 publications

Genome structure and evolution in the allohexaploid weed Avena fatua L. (Poaceae)

Genome structure and evolution in the allohexaploid weed Avena fatua L. (Poaceae)

The Biology of Canadian Weeds. 27.Avena fatuaL. (updated)

ORGANOPHYLETIC TRENDS IN SEVERAL MICROMORPHOLOGICAL FLORAL TRAITS IN THE HEXAPLOID CULTIVATED OATS (AVENA)

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