Gene transfer between canola (<i>Brassica napus</i> L. and <i>B. campestris</i> L.) and related weed species

Brown, J.; Brown, A. P.

doi:10.1111/j.1744-7348.1996.tb05773.x

Cited by 70 publications

(51 citation statements)

References 36 publications

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“…The fitness of the resulting hybrids or backcrossed plants is typically reduced in early generations; the F 1 and BC 1 generations usually exhibit reduced pollen fertility and seed production (Brown and Brown, 1996;Frello et al, 1995;Mikkelsen et al, 1996b). However, Snow et al (1999) found that the magnitude of the fitness disadvantages in hybrid progeny of the cross between B. rapa and B. napus diminished with successive generations of backcrossing.…”

Section: Resultsmentioning

confidence: 99%

Monitoring the escape of transgenic oilseed rape around Japanese ports and roadsides

Saji

Nakajima

Aono

et al. 2005

Environ. Biosafety Res.

100

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An investigation was carried out to monitor the escape and spread of oilseed rape (Brassica napus) transgenic plants and the introgression of transgenes to its closely related feral species in Japan. We screened a total of about 7500 feral B. napus, 300 B. rapa, and 5800 B. juncea seedlings from maternal plants in 143 locations at several ports, roadsides, and riverbanks. The presence of glufosinate-resistance or glyphosate-resistance transgenes in these seedlings was confirmed by means of herbicide treatments and also immunochemical and DNA analyses. B. napus plants with herbicide-resistant transgenic seeds were found at five of six major ports and along two of four sampled roadsides in the Kanto District. Transgenic oilseed rape plants have not been commercially cultivated in Japan, suggesting that the transgenes would probably have come from imported transgenic seeds that were spilled during transportation to oilseed processing facilities. No transgenes were detected in seeds collected from B. napus plants growing along riverbanks in the Kanto District or in seeds from closely related species (B. rapa and B. juncea). To our knowledge, this is the first published example of feral, transgenic populations occurring in a nation where the transgenic crop has not been cultivated commercially.

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Section: Resultsmentioning

confidence: 99%

Monitoring the escape of transgenic oilseed rape around Japanese ports and roadsides

Saji

Nakajima

Aono

et al. 2005

Environ. Biosafety Res.

100

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“…(n018) Alam et al (1992), Bing et al (1991Bing et al ( , 1996b, Gupta (1997) Gupta (1997) Bn)Br Bing et al (1991Bing et al ( , 1996b, Jorgensen and Andersen (1994), Vijayakumar et al (1994), Brown and Brown (1996), Mikkelsen et al (1996a), Gupta (1997), Landbo and Jørgensen (1997) Bijral and Sharma (1996b) Bn)Erucastrum gallicum (Willd.) O.E.…”

Section: Female Parent)male Parent Citationmentioning

confidence: 99%

The Biology of Canadian Weeds. 137. Brassica napus L. and B. rapa L.

Gulden¹,

Warwick²,

Thomas³

2008

Can. J. Plant Sci.

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. 2008. The Biology of Canadian Weeds. 137. Brassica napus L. and B. rapa. Can. J. Plan Sci. 88: 951Á996. Brassica napus and B. rapa are native to Eurasia. In Canada, these species are commonly referred to as volunteer canola, while feral populations of B. rapa are referred to as birdrape. Brassica napus and B. rapa have been grown commercially for their seed oil content in western Canada since the middle of the last century and volunteer populations are common in fields. Escaped populations of both species are also found along roadways, railways and in waste areas; however, only B. rapa is known to have naturalized, self-sustaining feral populations in these habitats in eastern Canada. Despite these escaped and feral populations, B. napus and B. rapa are mainly a concern in agricultural fields where their combined relative abundance has increased over the past few decades. In the mid 1990s, herbicideresistant genotypes of B. napus were released for commercial production. Herbicide-resistance and the stacking of genes in volunteer populations conferring resistance to multiple herbicides have contributed to increased difficulties in controlling volunteer B. napus in some crops. However, yield loss resulting from volunteer populations is not well documented in Canada.Key words: Brassica napus, Brassica rapa, herbicide resistance, transgene escape, volunteer canola, weed biology Gulden, R. H., Warwick, S. I. et Thomas, A. G. 2008. La biologie des mauvaises herbes au Canada. 137. Brassica napus L. et B. rapa L. Can. J. Plant Sci. 88: 951Á996. Brassica napus et B. rapa sont des plantes originaires d'Eurasie. Au Canada, on les de´signe souvent sous l'expression « canola spontane´», tandis que les peuplements sauvages de B. rapa sont appele´s « navette ». Dans l'Ouest canadien, Brassica napus et B. rapa sont cultive´s commercialement pour l'huile que renferment leurs graines depuis le milieu du sie`cle dernier et les repousses spontane´es sont devenues monnaie courante dans les champs. On observe des peuplements des deux espe`ces le long des routes et des voies ferre´es ainsi que dans les terrains vagues, cependant on sait que seule B. rapa s'est acclimate´e pour donner des populations sauvages et stables dans les meˆmes habitats, dans l'est du pays. Malgre´cela, B. napus et B. rapa demeurent surtout pre´occupants dans les cultures, oul eur abondance relative, une fois combine´s, s'est accrue au cours des dernie`res de´cennies. Au milieu des anne´e 1990, des ge´notypes de B. napus re´sistants aux herbicides ont e´te´homologue´s pour la culture commerciale. Cette re´sistance et l'accumulation des ge`nes qui la codent dans les peuplements spontane´s ont concouru a`compliquer la lutte contre les repousses de B. napus dans certaines cultures. Quoi qu'il en soit, les pertes de rendement qui en re´sultent sont mal e´taye´es au Canada.

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“…However, estimates of hybridization may be underestimated, since a herbicide resistance marker was used in only the first of the above three crosses, and morphological and fertility traits in the other two crosses. Brown and Brown (1996) studied the potential for gene transfer between Brassica spp., B. napus and B. rapa, and Sa by reciprocal hand pollination in the greenhouse. Pollen germination was observed in all hybrid combinations; pollen tubes were found in the ovaries of Sa × B. rapa (included two cultivars and one weedy population) and B. napus hybrids.…”

Section: Hybridsmentioning

confidence: 99%

The biology of Canadian weeds. 8. Sinapis arvensis. L. (updated)

Warwick¹,

Beckie²,

Thomas³

et al. 2000

Can. J. Plant Sci.

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. An updated review of biological information is provided for Sinapis arvensis L. Native to the Old World, the species is widely introduced and naturalized in temperate regions around the world. The species occurs in all the provinces, the Northwest Territories, and the Yukon. It is an important weed of field crops in the Canadian prairies. A strongly persistent seedbank, competitive annual growth habit and high fecundity all contribute to its weedy nature and ensure that it will be a continuing problem. Several cases of herbicide resistance have been documented for natural populations of S. arvensis in Canada, including biotypes resistant to: i) Group 2 herbicides, which inhibit acetolactate synthase (ALS), from Manitoba in 1992 and Alberta in 1993; ii) Group 4 herbicides or synthetic auxins from Manitoba in 1991; and iii) Group 5 herbicides, which inhibit photosynthesis at photosystem II, from Ontario in 1983. The species is a close relative of Brassica nigra (L.) Koch, black mustard, and is capable of limited genetic exchange with the Brassica crop species under laboratory hybridization conditions either by conventional crossing or with the aid of ovary/embryo recovery techniques.

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Gene transfer between canola (Brassica napus L. and B. campestris L.) and related weed species

Cited by 70 publications

References 36 publications

Monitoring the escape of transgenic oilseed rape around Japanese ports and roadsides

Monitoring the escape of transgenic oilseed rape around Japanese ports and roadsides

The Biology of Canadian Weeds. 137. Brassica napus L. and B. rapa L.

The biology of Canadian weeds. 8. Sinapis arvensis. L. (updated)

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