Pyrethroid resistance and thiacloprid baseline susceptibility of European populations of Meligethes aeneus (Coleoptera: Nitidulidae) collected in winter oilseed rape

2011 ◽  
Vol 67 (5) ◽  
pp. 599-608 ◽  
Author(s):  
Christoph T Zimmer ◽  
Ralf Nauen
Keyword(s):  
Oilseed Rape ◽  
Pyrethroid Resistance ◽  
Meligethes Aeneus ◽  
Winter Oilseed Rape ◽  
European Populations

scholarly journals Key pests and their parasitoids on spring and winter oilseed rape in Estonia

2006 ◽  
Vol 17 (4) ◽  
Author(s):  
Eve Veromann ◽  
Anne Luik ◽  
Luule Metspalu ◽  
Ingrid Williams
Keyword(s):  
Oilseed Rape ◽  
Meligethes Aeneus ◽  
Winter Oilseed Rape ◽  
Ceutorhynchus Assimilis ◽  
Tersilochus Heterocerus ◽  
Phradis Morionellus

The pests and their hymenopterous parasitoids present in a spring and a winter oilseed rape crop in Estoniawere studied. Meligethes aeneus was themost abundant pest in both crops. Other crucifer-specialist pests included: Ceutorhynchus assimilis, C. pallidactylus, C. rapae, C. floralis, C. pleurostigma and Phyllotreta spp., but their abundance was low. Four species of parasitoids of M. aeneus larvae (Diospilus capito, Phradis morionellus, P. interstitialis and Tersilochus heterocerus) and threeof C. assimilis larvae (Mesopolobus morys, Stenomalina gracilis and Trichomalus perfectus) were also found.

scholarly journals A novel deletion in FLOWERING LOCUS T modulates flowering time in winter oilseed rape

2021 ◽  
Author(s):  
Paul Vollrath ◽  
Harmeet S. Chawla ◽  
Sarah V. Schiessl ◽  
Iulian Gabur ◽  
HueyTyng Lee ◽  
...  
Keyword(s):  
Association Mapping ◽  
Flowering Time ◽  
Oilseed Rape ◽  
Major Effect ◽  
Structural Variants ◽  
Winter Oilseed Rape ◽  
Flowering Locus T ◽  
Winter Type ◽  
Long Read ◽  
Flowering Locus

Abstract Key message A novel structural variant was discovered in the FLOWERING LOCUS T orthologue BnaFT.A02 by long-read sequencing. Nested association mapping in an elite winter oilseed rape population revealed that this 288 bp deletion associates with early flowering, putatively by modification of binding-sites for important flowering regulation genes. Abstract Perfect timing of flowering is crucial for optimal pollination and high seed yield. Extensive previous studies of flowering behavior in Brassica napus (canola, rapeseed) identified mutations in key flowering regulators which differentiate winter, semi-winter and spring ecotypes. However, because these are generally fixed in locally adapted genotypes, they have only limited relevance for fine adjustment of flowering time in elite cultivar gene pools. In crosses between ecotypes, the ecotype-specific major-effect mutations mask minor-effect loci of interest for breeding. Here, we investigated flowering time in a multiparental mapping population derived from seven elite winter oilseed rape cultivars which are fixed for major-effect mutations separating winter-type rapeseed from other ecotypes. Association mapping revealed eight genomic regions on chromosomes A02, C02 and C03 associating with fine modulation of flowering time. Long-read genomic resequencing of the seven parental lines identified seven structural variants coinciding with candidate genes for flowering time within chromosome regions associated with flowering time. Segregation patterns for these variants in the elite multiparental population and a diversity set of winter types using locus-specific assays revealed significant associations with flowering time for three deletions on chromosome A02. One of these was a previously undescribed 288 bp deletion within the second intron of FLOWERING LOCUS T on chromosome A02, emphasizing the advantage of long-read sequencing for detection of structural variants in this size range. Detailed analysis revealed the impact of this specific deletion on flowering-time modulation under extreme environments and varying day lengths in elite, winter-type oilseed rape.

Greenhouse and field experiments with winter oilseed rape cultivars resistant to Plasmodiophora brassicae Wor.

2017 ◽  
Vol 92 ◽  
pp. 60-69 ◽  
Author(s):  
Veronika Řičařová ◽  
Jan Kazda ◽  
Petr Baranyk ◽  
Pavel Ryšánek
Keyword(s):  
Oilseed Rape ◽  
Field Experiments ◽  
Plasmodiophora Brassicae ◽  
Winter Oilseed Rape

Yield response to N fertilizer and optimum N rate of winter oilseed rape under different soil indigenous N supplies

2015 ◽  
Vol 181 ◽  
pp. 52-59 ◽  
Author(s):  
Hui Li ◽  
Rihuan Cong ◽  
Tao Ren ◽  
Xiaokun Li ◽  
Changbao Ma ◽  
...  
Keyword(s):  
Oilseed Rape ◽  
N Fertilizer ◽  
Yield Response ◽  
Winter Oilseed Rape ◽  
Optimum N Rate
Sign in / Sign up

Export Citation Format

Share Document