scholarly journals BIOCHEMICAL ASSESSMENT OF YELLOW SPRING RAPE BRASSICA NAPUS L. SEED LINES

2021 ◽  
pp. 19-25
Author(s):  
N.G. Markelova ◽  
V.V. Karpachev
Keyword(s):  
Brassica Napus ◽  
Brassica Napus L ◽  
Yellow Spring ◽  
Biochemical Assessment ◽  
Spring Rape

Introgression of long pod genotype from spring rape (Brassica napus L.) into summer turnip rape (Brassica rapa L.)

2001 ◽  
Vol 81 (1) ◽  
pp. 59-60 ◽  
Author(s):  
L. J. Lewis ◽  
D. L. Woods ◽  
B. F. Cheng
Keyword(s):  
Brassica Napus ◽  
Key Words ◽  
Seed Size ◽  
Brassica Rapa ◽  
Interspecific Hybridisation ◽  
Brassica Napus L ◽  
Turnip Rape ◽  
Pod Length ◽  
Spring Rape

Long pod character from a summer Brassica napus L. line was introgressed into turnip rape B. rapa L. cultivar AC Sunshine resulting in progeny lines with significantly longer pods and larger seed size than those of AC Sunshine, but producing no yield advantage. Key words: Brassica rapa, Brassica napus, pod length, summer turnip rape, spring rape, interspecific hybridisation

Variation in the pre-anthesis development of spring rape (Brassica napus L.)

1977 ◽  
Vol 28 (4) ◽  
pp. 597 ◽  
Author(s):  
N Thurling ◽  
LDV Das
Keyword(s):  
Growth Rate ◽  
Brassica Napus ◽  
Continuous Light ◽  
Early Flowering ◽  
The Other ◽  
Direct Effects ◽  
Brassica Napus L ◽  
Controlled Environments ◽  
Effects Of Temperature ◽  
Spring Rape

Fifteen cultivars of spring rape (Brassica napus L.) were each sown at four different times between April and October at Perth in either natural photoperiods or continuous light. Under natural photoperiods, flowering of the Japanese cultivars Chisaya and Isuzu was delayed in later sowings, but the flowering times of all other cultivars were advanced with each successive delay in sowing. When plants were grown under continuous light another two groups of cultivars could be recognized. One group comprised early-flowering Canadian cultivars which flowered later in the June sowing than in the other sowings. The other group comprised late-flowering European cultivars characterized by a slight delay in flowering in the last sowing. The direct effects of temperature on growth rate were more important than inductive responses in determining time of flowering in all cultivars except Chisaya and Isuzu, which had substantial vernalization requirements. Other cultivars such as Komet, Bronowski, Masoweicki and Norin 16 had low vernalization requirements which were largely masked by the increase in the rate of growth with higher temperatures in later sowings. In controlled environments, considerable variation in response to vernalization, temperature and photoperiod was detected between six spring rape cultivars. The early-flowering Canadian cultivars Target and Oro were the least responsive to vernalization and under continuous light did not respond at all. European and Japanese cultivars used here responded more markedly to vernalization, and their responses were greatly influenced by temperatures experienced after the completion of vernalization. Under continuous light and high temperature, the Japanese cultivars responded markedly to 4 weeks' vernalization which apparently saturated the system. The European cultivars Bronowski and Masoweicki, on the other hand, only responded moderately.

The phenology of the emergence of brassica pod midge (Dasineura brassicae Winn.) and its infestation of spring oil-seed rape (Brassica napus L.)

1987 ◽  
Vol 109 (2) ◽  
pp. 309-314 ◽  
Author(s):  
Ingrid H. Williams ◽  
A. P. Martin ◽  
Maria Kelm
Keyword(s):  
Brassica Napus ◽  
Small Proportion ◽  
Second Generation ◽  
Brassica Napus L ◽  
Oil Seed ◽  
Oil Seed Rape ◽  
Two Generations ◽  
Dasineura Brassicae ◽  
Spring Rape

SummaryThe phenology of the emergence of brassica pod midge from overwintering sites previously sown with spring oil-seed rape and its subsequent infestation of spring rape crops was studied over 3 years. Adults emerged from the overwintering sites from mid-May until early July, but infestation of spring rape did not begin until late June. Two generations occurred on spring rape. Mature larvae dropped from the pods almost daily from early to mid-July until mid-August to early September to form cocoons in the soil. A small proportion of these larvae developed into pupae and emerged as a second generation of adults to lay further eggs in the crops. Larvae from these eggs dropped to the soil to diapause within cocoons.

scholarly journals Obtaining androclinous lines of spring rape (Brassica Napus L.)

2020 ◽  
Author(s):  
A.A. Muravlev ◽  
E.V. CHesnokova ◽  
YU.A. Kolycheva
Keyword(s):  
Brassica Napus ◽  
Brassica Napus L ◽  
Spring Rape

Diallel analysis of vernalisation responses in spring rape (Brassica napus L.): a basis for adaptation to a Mediterranean environment

1999 ◽  
Vol 50 (8) ◽  
pp. 1417 ◽  
Author(s):  
S. R. Dahanayake ◽  
N. W. Galwey
Keyword(s):  
Genetic Variation ◽  
Brassica Napus ◽  
Stem Elongation ◽  
Selection Criterion ◽  
Genetic Effects ◽  
Mediterranean Environment ◽  
Stem Height ◽  
Brassica Napus L ◽  
Time To Initiation ◽  
Spring Rape

The capacity for vernalisation varies among genotypes of spring rape, Brassica napus L., and any vernalisation response reduces their suitability for cultivation in the Mediterranean environment of south-western Western Australia. The genetic basis of this variation was studied in the F1 generation of a diallel cross among 5 inbred genotypes derived from a cross between 2 cultivars differing in sensitivity to vernalisation. In non-vernalised plants the number of leaf nodes at flowering, time to flowering, stem height at flowering, and time to initiation of stem elongation showed substantial genetic variation, both additive and dominance effects being significant. The time to initiation of stem elongation was not vernalisation-sensitive, but for the other 3 characters the response to vernalisation showed significant genetic variation, largely additive. The genetic effects controlling the number of leaf nodes at flowering were clearly different from those controlling stem height at flowering, and hence could be manipulated independently by selection. Moreover, the genetic effects controlling these characters in the absence of vernalisation were different from those controlling the response to vernalisation. Discontinuities in the distributions of the parent means and other statistics for the number of leaf nodes at flowering suggested that major Mendelian genes may largely control this character and its response to vernalisation. Comparison of the number of leaf nodes at flowering in the presence and absence of a vernalising stimulus is therefore suggested as a selection criterion for the elimination of vernalisation response. However, in the absence of a vernalising stimulus, the time to flowering will be the character easiest to influence by selection.

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