Developing and testing an algorithm for site-specific N fertilization of winter oilseed rape

2017 ◽  
Vol 136 ◽  
pp. 228-237 ◽  
Author(s):  
Ingo Pahlmann ◽  
Ulf Böttcher ◽  
Henning Kage
Keyword(s):  
Oilseed Rape ◽  
N Fertilization ◽  
Winter Oilseed Rape ◽  
Site Specific

On-farm trials of site-specific N management for maximum winter oilseed rape (Brassica napus L.) yield

2017 ◽  
Vol 40 (9) ◽  
pp. 1300-1311
Author(s):  
Bo Liu ◽  
Tao Ren ◽  
Jianwei Lu ◽  
Xiaokun Li ◽  
Rihuan Cong ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Oilseed Rape ◽  
Winter Oilseed Rape ◽  
Brassica Napus L ◽  
Site Specific ◽  
N Management ◽  
On Farm

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
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