Spring-sown winter-type canola (Brassica napus) as summer–autumn forage for sheep production in southern Australia

2020 ◽  
Author(s):  
M. C. Raeside ◽  
J. Byron ◽  
F. Cameron ◽  
C. MacDonald ◽  
D. L. Partington ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Winter Type ◽  
Sheep Production

scholarly journals Diverse regulatory factors associate with flowering time and yield responses in winter-type Brassica napus

BMC Genomics ◽  
2015 ◽  
Vol 16 (1) ◽  
Author(s):  
Sarah Schiessl ◽  
Federico Iniguez-Luy ◽  
Wei Qian ◽  
Rod J. Snowdon
Keyword(s):  
Brassica Napus ◽  
Flowering Time ◽  
Regulatory Factors ◽  
Winter Type ◽  
Yield Responses

Characterization of flowering time and SSR marker analysis of spring and winter type Brassica napus L. germplasm

Euphytica ◽  
2006 ◽  
Vol 153 (1-2) ◽  
pp. 43-57 ◽  
Author(s):  
Von Mark V. Cruz ◽  
Richard Luhman ◽  
Laura F. Marek ◽  
Charlie L. Rife ◽  
Randy C. Shoemaker ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Flowering Time ◽  
Ssr Marker ◽  
Brassica Napus L ◽  
Winter Type ◽  
Marker Analysis

scholarly journals Potential for Seed Transmission of Verticillium longisporum in Oilseed Rape (Brassica napus)

Plant Disease ◽  
2019 ◽  
Vol 103 (8) ◽  
pp. 1843-1849 ◽  
Author(s):  
Xiaorong Zheng ◽  
Daniel Teshome Lopisso ◽  
Alice Bisola Eseola ◽  
Birger Koopmann ◽  
Andreas von Tiedemann
Keyword(s):  
Brassica Napus ◽  
Oilseed Rape ◽  
Seed Transmission ◽  
Soil Conditions ◽  
Plant Colonization ◽  
Winter Oilseed Rape ◽  
Field Inoculation ◽  
Verticillium Longisporum ◽  
Winter Type ◽  
Spring Type

Verticillium longisporum is a soilborne vascular fungal pathogen that has spread throughout the European oilseed rape cultivation area since the 1980s and was detected in canola fields in Canada in 2014. In a series of greenhouse and field inoculation experiments using V. longisporum-resistant and susceptible cultivars of winter and spring types of oilseed rape, the present study investigated the potential of V. longisporum dissemination by seeds of Brassica napus. Greenhouse inoculation studies with a DsRed-labeled isolate of V. longisporum confirmed the systemic growth of the pathogen from roots to seeds. Further monitoring of plant colonization in the greenhouse with a species-specific real-time polymerase chain reaction assay verified the pathogen growth from roots to stem bases, pods, and seeds in root-inoculated plants. The frequency of recovery of viable colonies of V. longisporum from seeds harvested from greenhouse-grown inoculated plants ranged from 0.08 to 13.3%. The frequency of seed transmission in the greenhouse differed in oilseed rape cultivars varying in susceptibility to V. longisporum. Subsequent studies on transmission of the disease into the offspring revealed that only 1.7 to 2.3% of plants showed disease symptoms as confirmed by the formation of microsclerotia in the stems. Results from field-grown plants differed from the greenhouse studies. The degree of seed transmission in the field was dependent on the crop type. Although only low concentrations of DNA of V. longisporum were detectable in seeds harvested from severely infected winter oilseed rape, significantly greater concentrations of fungal DNA were found in seeds of spring-type oilseed rape, at similar soil conditions and inoculum densities. Correspondingly, plating seeds that were harvested from infected plants on agar yielded viable V. longisporum colonies only from seeds of the spring-type but not of the winter-type plants. Lack of seed infection in the winter-type crop was confirmed in two seasons. Equally, none of the offspring grown from seeds from severely diseased winter oilseed rape plants developed symptoms of Verticillium stem striping. The results suggest that the rate of seed transmission of V. longisporum depends on the degree of plant colonization, which is significantly faster under greenhouse than field conditions and in a spring-sown crop compared with an autumn-sown oilseed rape crop. According to our studies, disease transmission by seeds from European winter oilseed rape production cannot be confirmed.

scholarly journals An Insight into the Responses of Early-Maturing Brassica napus to Different Low-Temperature Stresses

2020 ◽  
Author(s):  
Xin He
Keyword(s):  
Brassica Napus ◽  
Low Temperature ◽  
Molecular Mechanisms ◽  
Temperature Stresses ◽  
Brassica Napus L ◽  
Winter Type ◽  
Early Maturing ◽  
Biennial Plants ◽  
Winter Rapeseed ◽  
Insight Into

Rapeseed (Brassica napus L.) is an important oil crop worldwide, responds to vernalization, and shows an excellent tolerance to cold stresses during vegetative stage. The winter-type and semi-winter-type rapeseed were typical winter biennial plants in Europe and China. In recent years, more and more early-maturing semi-winter rapeseed varieties were planted across China. Unfortunately, the early-maturing rapeseed varieties with low cold tolerance have higher risk of freeze injury in cold winter and spring. The molecular mechanisms for coping with different low-temperature stress conditions in rapeseed recently had gained more attention and development. The present review gives an insight into the responses of early-maturing B. napus to different low-temperature stresses (chilling, freezing, cold-acclimation, and vernalization), and the strategies to improve tolerance against low-temperature stresses are also discussed.

Effect of defoliation on spring-sown winter-type canola (Brassica napus) grain yield, quality and morphology

2020 ◽  
Author(s):  
M. C. Raeside ◽  
J. Byron ◽  
F. Cameron ◽  
C. MacDonald ◽  
D. L. Partington ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Grain Yield ◽  
Winter Type ◽  
Yield Quality
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