Physiological and yield effects of uniconazole on winter rape (Brassica napus L.)

1996 ◽  
Vol 15 (2) ◽  
pp. 69-73 ◽  
Author(s):  
W. Zhou ◽  
Q. Ye
Keyword(s):  
Brassica Napus ◽  
Winter Rape ◽  
Brassica Napus L

scholarly journals Varietal Diversity of Seed Glucosinolates Content and its Composition in Japanese Winter Rape (Brassica napus L.).

1995 ◽  
Vol 45 (3) ◽  
pp. 357-364
Author(s):  
Masahiko Ishida ◽  
Yoshinao Okuyama ◽  
Yoshihito Takahata ◽  
Norihiko Kaizuma
Keyword(s):  
Brassica Napus ◽  
Varietal Diversity ◽  
Winter Rape ◽  
Brassica Napus L ◽  
Seed Glucosinolates

scholarly journals DOUBLE CROPPING WINTER RAPESEED AND GRAIN SORGHUM

1986 ◽  
Vol 66 (3) ◽  
pp. 425-430 ◽  
Author(s):  
R. R. DUNCAN ◽  
C. S. HOVELAND
Keyword(s):  
Glycine Max ◽  
Brassica Napus ◽  
Cropping System ◽  
Grain Sorghum ◽  
Winter Rape ◽  
Brassica Napus L ◽  
Double Cropping ◽  
Glycine Max L ◽  
Winter Rapeseed ◽  
Sorghum Bicolor L

Since rainfall generally exceeds 500 mm during the winter months and soil erosion is a problem in the southern U.S.A., a cover crop is essential to reduce soil losses. Continuous cultivation of a crop on the same land also provides the opportunity for pest problems to develop. A winter rapeseed (Brassica napus L.)-grain sorghum (Sorghum bicolor (L). Moench.) double-cropping system was investigated in the field from 1981 to 1984. Conventional tillage (CT) and no-till (NT) systems were used for both crops. Gullivar rape was planted in October and harvested in June. Winter rapeseed yields averaged 2.87 t ha−1 on CT plots in 1982. Averaged over 1983 and 1984, rape yields were 1.66 and 0.73 t ha−1 on CT and NT plots, respectively. However, the seeding method biased the rapeseed performance. Problems were encountered with winter weed control and pod shattering in the winter rape plots. Two sorghum hybrids, R. C. Young Oro Txtra and Funks G-550, were planted in June and harvested in October. Grain yields were not significantly different between hybrids (Oro 5.69 t ha−1, Funk 5.67 t ha−1) or between tillage systems (CT 5.59 t ha−1, NT 5.78 t ha−1). Grain yield differences were noted for year × hybrid × tillage interactions. Rape was a weed problem in the sorghum plots. The winter rape-sorghum double-cropping system offers an alternative to current winter small grains-sorghum/soybean (Glycine max (L.) Merr.) or winter annual legume-sorghum/soybean (Glycine max (L.) Merr.) systems; however, markets for the winter rapeseed and production economic analyses are needed prior to adoption of the system. Additional winter rapeseed research is needed to evaluate yields properly under NT conditions.Key words: Sorghum bicolor (L.) Moench, Brassica napus L., conservation tillage, multiple cropping, sorghum, rapeseed

Cytogenetic analysis of plants regenerated from tissue explants and mesophyll protoplasts of winter rape, Brassica napus L.

1984 ◽  
Vol 26 (6) ◽  
pp. 752-761 ◽  
Author(s):  
C. A. Newell ◽  
M. L. Rhoads ◽  
D. L. Bidney
Keyword(s):  
Brassica Napus ◽  
Chromosome Number ◽  
Germ Line ◽  
Male Sterile ◽  
Male Sterile Line ◽  
Winter Rape ◽  
Brassica Napus L ◽  
Mesophyll Protoplasts ◽  
Regenerated Plants ◽  
Chromosome Associations

Plants were regenerated from seedling tissue explants of four lines of winter rape (Brassica napus L.) including a cytoplasmic male sterile line carrying Raphanus sativus L. cytoplasm, and from leaf mesophyll protoplasts of the cytoplasmic male sterile line. Chromosome number variability was investigated in 102 regenerated plants. Mitotic root-tip cells were scored initially; those plants exhibiting mixoploidy or an altered chromosome number were reexamined at meiosis to confirm the presence of alterations in germ line cells. Plants regenerated from seedling explants included 2n = 38 diploids (87.0%) similar to the parental line, monosomics (7.8%), trisomics (2.6%), and 2n = 76 tetraploids (1.3%). The germ line number was not resolved in one mixoploid (1.3%). Protoplast-derived regenerated plants were diploid (44%), hypodiploid (20%), and tetraploid or hypotetraploid (36%). Meiotic analysis of regenerated plants showed a range of multiple chromosome associations with no plants consistently exhibiting bivalent formation only. Chromosomal alterations other than number may have been induced by culture, but could not be substantiated since multiple chromosome associations were also frequent in control plants grown from seed.Key words: plant regeneration, protoplast regeneration, Brassica napus, cytogenetics.

Studies on some toxic substances in brassica napus L. var. Winter Rape, cultivated in Chile

1969 ◽  
Vol 17 (4) ◽  
pp. 257-264 ◽  
Author(s):  
Luc�a Bra�es ◽  
Elvira Ballester
Keyword(s):  
Brassica Napus ◽  
Toxic Substances ◽  
Winter Rape ◽  
Brassica Napus L

scholarly journals Activation of rape (Brassica napus L.) embryo during seed germination. III. Ultrastructure of dry embryo axis

2014 ◽  
Vol 53 (2) ◽  
pp. 171-186 ◽  
Author(s):  
Mieczysław Kuraś
Keyword(s):  
Brassica Napus ◽  
Cell Ultrastructure ◽  
Embryo Axis ◽  
Storage Material ◽  
Cell Organelles ◽  
Normal Appearance ◽  
Winter Rape ◽  
Brassica Napus L ◽  
Dense Cytoplasm ◽  
Storage Organs

Mature dry winter rape (<em>Brassica napus</em> L.), var. <em>oleifera</em>, cv. Górczański embryos were studied in the light and the electron microscope. Considerable modifications and regression of the cell ultrastructure were noted in the resting embryo as compared with the metabolically active cells. The degree of regression of the ultrastructure differed in the particular organs and tissues of the embryo. Of most regressed character are the cells of the storage organs - the hypocotyl and cotyledones. They are almost completely filled with protein and lipid bodies. The small spaces between them are filled with dense cytoplasm with a lobular nucleus and not numerous, difficult to identify, plastids and mitochondria. The cells of the shoot primordium and radicle, particularly of the protoderm at the boundary of the hypocotyl and root and columella of root cap have a less regressed ultrastructure. They contain less storage material, a less dense cytoplasm and nearly all cell organelles with a normal appearance. The mitochondria are quite numerous with rather large cristae. Plastids are large with characteristic infolds filled with cytoplasm and some lamellae and a few agglomerations of plastoglobules. The nucleus is lobular with distinctly double and porous nuclear envelope and uniformly dense nucleolus. These cells do not contain dictyosomes and the ER is reduced to short, mostly rough cisternae and vesicles. Cells within the columella itself are also differentiated. The least regression of ultrastructure is seen in the cells of external layers containing the most numerous and most active looking mitochondria and more ER structures. The promeristem cells are similar to those of the deeper columella layers but their mitochondria are more regressed. The cells of the lateral parts of the cap and radicle cells, distant from the promeristem are more similar to the hypocotyl cells.

Development of an Effective In Vitro Regeneration System for Ukrainian Breeding Winter Rape Brassica napus L.

2020 ◽  
Vol 54 (4) ◽  
pp. 341-346 ◽  
Author(s):  
I. S. Hnatyuk ◽  
O. I. Varchenko ◽  
M. V. Kuchuk ◽  
M. F. Parii ◽  
Yu. V. Symonenko
Keyword(s):  
Brassica Napus ◽  
In Vitro Regeneration ◽  
Regeneration System ◽  
Winter Rape ◽  
Brassica Napus L
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