scholarly journals Glucosinolate Biosynthesis (Further Characterization of the Aldoxime-Forming Microsomal Monooxygenases in Oilseed Rape Leaves)

1995 ◽  
Vol 109 (1) ◽  
pp. 299-305 ◽  
Author(s):  
R. N. Bennett ◽  
A. J. Hick ◽  
G. W. Dawson ◽  
R. M. Wallsgrove
Keyword(s):  
Oilseed Rape ◽  
Glucosinolate Biosynthesis ◽  
Microsomal Monooxygenases

Biological and Molecular Characterization of a Crucifer Tobamovirus Infecting Oilseed Rape

2009 ◽  
Vol 47 (7-8) ◽  
pp. 451-461 ◽  
Author(s):  
Li Cai ◽  
Kunrong Chen ◽  
Xuejiang Zhang ◽  
Liying Yan ◽  
Mingsheng Hou ◽  
...  
Keyword(s):  
Molecular Characterization ◽  
Oilseed Rape

Vernalization response in spring oilseed rape (Brassica napus L.) cultivars

1994 ◽  
Vol 74 (2) ◽  
pp. 275-277 ◽  
Author(s):  
L. A. Murphy ◽  
R. Scarth
Keyword(s):  
Brassica Napus ◽  
Oilseed Rape ◽  
Vernalization Response ◽  
Brassica Napus L ◽  
Early Maturity ◽  
Breeding Programs ◽  
Cumulative Response ◽  
Cold Requirement ◽  
Key Words:Brassica

Early maturity is a major objective of oilseed rape (Brassica napus L.) breeding programs in western Canada. Maturity of crops is influenced by time of initiation and flowering. The presence of a vernalization requirement affects plant development by delaying floral initiation until the cold requirement of the plant has been satisfied. Five spring oilseed rape cultivars were screened for their response to vernalization. Vernalization treatments consisted of exposure of germinated seeds to 0–42 d at 4 °C. Plants were assessed under a 20-h photoperiod. In general, there was a cumulative response to vernalization, with a decrease in days to each developmental stage as exposure to 4 °C was increased. Vernalization treatment of 6 d at 4 °C was sufficient to decrease both the days to first flower and the final leaf number. The characterization of vernalization response is of interest because variation in flowering time in response to year-to-year variations in the environment could result. Key words:Brassica napus, canola, oilseed rape, vernalization

scholarly journals Meiosis in Polyploids and Implications for Genetic Mapping: A Review

Genes ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1517
Author(s):  
Nina Reis Soares ◽  
Marcelo Mollinari ◽  
Gleicy K. Oliveira ◽  
Guilherme S. Pereira ◽  
Maria Lucia Carneiro Vieira
Keyword(s):  
Oilseed Rape ◽  
Genetic Maps ◽  
Crop Species ◽  
Map Construction ◽  
Complex Process ◽  
New Gene ◽  
Specific Proteins ◽  
Bivalent Formation ◽  
Essential Knowledge

Plant cytogenetic studies have provided essential knowledge on chromosome behavior during meiosis, contributing to our understanding of this complex process. In this review, we describe in detail the meiotic process in auto- and allopolyploids from the onset of prophase I through pairing, recombination, and bivalent formation, highlighting recent findings on the genetic control and mode of action of specific proteins that lead to diploid-like meiosis behavior in polyploid species. During the meiosis of newly formed polyploids, related chromosomes (homologous in autopolyploids; homologous and homoeologous in allopolyploids) can combine in complex structures called multivalents. These structures occur when multiple chromosomes simultaneously pair, synapse, and recombine. We discuss the effectiveness of crossover frequency in preventing multivalent formation and favoring regular meiosis. Homoeologous recombination in particular can generate new gene (locus) combinations and phenotypes, but it may destabilize the karyotype and lead to aberrant meiotic behavior, reducing fertility. In crop species, understanding the factors that control pairing and recombination has the potential to provide plant breeders with resources to make fuller use of available chromosome variations in number and structure. We focused on wheat and oilseed rape, since there is an abundance of elucidating studies on this subject, including the molecular characterization of the Ph1 (wheat) and PrBn (oilseed rape) loci, which are known to play a crucial role in regulating meiosis. Finally, we exploited the consequences of chromosome pairing and recombination for genetic map construction in polyploids, highlighting two case studies of complex genomes: (i) modern sugarcane, which has a man-made genome harboring two subgenomes with some recombinant chromosomes; and (ii) hexaploid sweet potato, a naturally occurring polyploid. The recent inclusion of allelic dosage information has improved linkage estimation in polyploids, allowing multilocus genetic maps to be constructed.

scholarly journals Origin and evolution of transporter substrate specificity within the NPF family

eLife ◽  
2017 ◽  
Vol 6 ◽  
Author(s):  
Morten Egevang Jørgensen ◽  
Deyang Xu ◽  
Christoph Crocoll ◽  
Heidi Asschenfeldt Ernst ◽  
David Ramírez ◽  
...  
Keyword(s):  
Substrate Specificity ◽  
Biochemical Characterization ◽  
Biosynthetic Pathways ◽  
Cyanogenic Glucosides ◽  
Evolutionary Path ◽  
Substrate Specificities ◽  
Origin And Evolution ◽  
Glucosinolate Biosynthesis ◽  
Phylogenetic Lineage

Despite vast diversity in metabolites and the matching substrate specificity of their transporters, little is known about how evolution of transporter substrate specificities is linked to emergence of substrates via evolution of biosynthetic pathways. Transporter specificity towards the recently evolved glucosinolates characteristic of Brassicales is shown to evolve prior to emergence of glucosinolate biosynthesis. Furthermore, we show that glucosinolate transporters belonging to the ubiquitous NRT1/PTR FAMILY (NPF) likely evolved from transporters of the ancestral cyanogenic glucosides found across more than 2500 species outside of the Brassicales. Biochemical characterization of orthologs along the phylogenetic lineage from cassava to A. thaliana, suggests that alterations in the electrogenicity of the transporters accompanied changes in substrate specificity. Linking the evolutionary path of transporter substrate specificities to that of the biosynthetic pathways, exemplify how transporter substrate specificities originate and evolve as new biosynthesis pathways emerge.

scholarly journals Characterization of the pollen beetle, Brassicogethes aeneus, dispersal from woodlands to winter oilseed rape fields

PLoS ONE ◽  
2017 ◽  
Vol 12 (8) ◽  
pp. e0183878 ◽  
Author(s):  
Amandine Suzanne Juhel ◽  
Corentin Mario Barbu ◽  
Pierre Franck ◽  
Jean Roger-Estrade ◽  
Arnaud Butier ◽  
...  
Keyword(s):  
Oilseed Rape ◽  
Winter Oilseed Rape ◽  
Pollen Beetle ◽  
Brassicogethes Aeneus

124 Characterization of oilseed rape allergens

1996 ◽  
Vol 97 (1) ◽  
pp. 213-213 ◽  
Author(s):  
M FOCKE ◽  
W HEMMER ◽  
R BRACUN ◽  
S WOLF ◽  
F WANTKE ◽  
...  
Keyword(s):  
Oilseed Rape

scholarly journals Characterization of the interactions between architecture and source–sink relationships in winter oilseed rape (Brassica napus) using the GreenLab model

2010 ◽  
Vol 107 (5) ◽  
pp. 765-779 ◽  
Author(s):  
Alexandra Jullien ◽  
Amélie Mathieu ◽  
Jean-Michel Allirand ◽  
Amélie Pinet ◽  
Philippe de Reffye ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Oilseed Rape ◽  
Winter Oilseed Rape ◽  
Source Sink
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