Chromosome Numbers of Canadian Weeds. I

Mulligan, Gerald A.

doi:10.1139/b57-064

Cited by 109 publications

(74 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…serriola is a diploid species with a reported chromosome number of 2n = 18, for specimens from Québec, Ontario and Saskatchewan (Mulligan 1957) and Europe (Feráková 1977).…”

Section: Description and Account Of Variationmentioning

confidence: 99%

The biology of Canadian weeds. 122. Lactuca serriola L.

Weaver¹,

Downs²

2003

Can. J. Plant Sci.

View full text Add to dashboard Cite

Weaver, S. E. and Downs, M. P. 2003. The biology of Canadian weeds. 122. Lactuca serriola L. Can. J. Plant Sci. 83: 619-628. Lactuca serriola (prickly lettuce, compass plant) is a winter or summer annual, introduced to Canada from Eurasia, and found in all provinces except Newfoundland. It occupies a variety of disturbed sites, and is becoming an increasing problem in crops grown with reduced tillage. Most seedlings emerge in autumn and form overwintering rosettes, with a smaller peak of emergence in spring. Flowering occurs from July through September. Seed production is proportional to stem height, and ranges up to 200 000 seeds per plant. The wind-dispersed seeds have no primary dormancy and form only a short-term seed bank (1 to 3 yr). Many populations in the western United States and southern Australia have developed resistance to Group 2 herbicides, which inhibit the enzyme acetolactate synthase. Prickly lettuce is closely related to, and inter-fertile with, cultivated lettuce, Lactuca sativa L. On la trouve dans toutes les provinces sauf Terre-Neuve. L'espèce envahit divers lieux perturbés et pose un problème grandissant dans les cultures quand il n'y a pas travail du sol. La plupart des plantules lèvent à l'automne pour former des rosettes qui survivent à l'hiver, mais quelques-unes germent au printemps. La floraison s'étend de juillet à septembre. La production de graines est proportionnelle à la hauteur de la tige et peut atteindre 200 000 par plant. Les semences sont disséminées par le vent et n'ont pas de dormance primaire. Elles ne constituent donc d'une réserve à court terme (de 1 à 3 ans). Maints peuplements de l'ouest des États-Unis et du sud de l'Australie ont développé une résistance aux herbicides du groupe 2, qui inhibent l'acétolactate synthase. La laitue sauvage est étroitement apparentée à la laitue frisée, Lactuca sativa L., les deux espèces se fécondant mutuellement.

show abstract

“…serriola is a diploid species with a reported chromosome number of 2n = 18, for specimens from Québec, Ontario and Saskatchewan (Mulligan 1957) and Europe (Feráková 1977).…”

Section: Description and Account Of Variationmentioning

confidence: 99%

The biology of Canadian weeds. 122. Lactuca serriola L.

Weaver¹,

Downs²

2003

Can. J. Plant Sci.

View full text Add to dashboard Cite

show abstract

“…2a), from the southern region of Vancouver Island to the eastern shores of Newfoundland (Scoggan 1979 (Pobedimova 1961;Kay 1965Kay , 1969Kay , 1912Hamet-Ahti 1967 (Woo 1989 (Kessler 1989b Saskatchewan (1928), at Lacombe and Sylvan Lake. Alberta (1933) (Mulligan 1959 (Woo 1989). …”

Section: Geographical Distributionmentioning

confidence: 99%

The biology of Canadian weeds. 99. Matricaria perforata Mérat (Asteraceae)

Woo¹,

Harms²,

Thomas³

et al. 1991

Can. J. Plant Sci.

View full text Add to dashboard Cite

“…Chromosome number reported as both ?n:16 and2n:32 in Europe (Clapham et al 1962). In North America only 2n:16 has been reported (Mulligan 1957 sharply pointed stipules and the mucronate leaftip serve to distinguishM. lupulina from Trifulium dubium (Robinson 1949 (Baum 1968 (Gleason 1963 For personal use only.…”

Section: Namesmentioning

confidence: 99%