Heat Stress during Flowering in Summer Brassica

Morrison, Malcolm J.; Stewart, D. W.

doi:10.2135/cropsci2002.0797

Cited by 137 publications

(135 citation statements)

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“…In domesticated B. napus, flowering was reached at about 576 GDD (about 47 d), pod fill was reached at about 860 GDD (about 66 d) and maturity was reached at about 1157 GDD (about 87 d) in western Canada (Morrison et al 1989;Kimber and McGregor 1995) with similar thermal time requirements in eastern Canada (Morrison and Stewart 2002). Domesticated B. rapa required about 60 d to reach maturity in western Canada (Kimber and McGregor 1995).…”

Section: Historymentioning

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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Section: Historymentioning

confidence: 99%

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

Gulden¹,

Warwick²,

Thomas³

2008

Can. J. Plant Sci.

View full text Add to dashboard Cite

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“…The period from 1998 to 2010, now known in Australia as the millennium drought (Verdon-Kidd et al 2014) was characterised by dry autumns, late planting rains and limited soil water storage, together with hot, dry springs which favoured cereals such as wheat and barley over canola. As the area of canola declined and the crop retreated to the more reliable rainfall areas, the overall yield levels were maintained, except for the notable drought years of 2002 and2006 (Fig. 2).…”

Section: Background and Production Trendsmentioning

confidence: 99%

“…Lilley et al (2015) recently incorporated frost and heat indices into simulation predictions based on limited published data on the impacts of temperature extremes on yield in the field, and although field validation is limited, yield predictions were improved in a recent study on sowing time effects in NSW (Kirkegaard et al 2016). Improved understanding of the impacts of temperature extremes on yield and quality in canola and improving genetic tolerance remain key objectives for physiologists (Morrison and Stewart 2002;Robertson and Lilley 2016) and breeders in Australia and elsewhere. Morrison et al (2016b) present a novel screening technique to investigate the impacts of heat on pollen germination, which is often assumed to be the major cause of sterility and yield loss under heat stress.…”

Section: Phenology Physiology and Modellingmentioning

confidence: 99%

Drivers of trends in Australian canola productivity and future prospects

2016

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“…For the temperate legume crop pea (Pisum sativum L.), a temperate above 25°C can be considered as limiting (Guilioni et al, 2003). Regarding the differing effects of temperature on the plant physiology in each range, stress-inducing temperature has been defined as severe when temperature exceeds 35°C for a few hours a day for a few days (Guilioni & Jeuffroy, 2010 (Morrison & Stewart, 2002). In temperate cereals as wheat, two heat ranges may produce distinct negative reactions: a moderate high temperature range between 15 and 32°C, and a severe heat stress above 32°C (Wardlaw & Wrigley, 1994).…”

Section: Impact Of Heat Stress On Plant N Fluxesmentioning

confidence: 99%