scholarly journals Production of Restorer Lines from Segregating Progenies of Brassica napus L. Having Good Agronomic Value

2020 ◽  
Vol 8 (4) ◽  
pp. 400-409
Author(s):  
A. K. M. Aminul Islam ◽  
F. M. Era ◽  
N. K. Aminul Chowdhury
Keyword(s):  
Brassica Napus ◽  
Seed Yield ◽  
Seed Weight ◽  
Pollen Sterility ◽  
The Other ◽  
Restorer Line ◽  
Brassica Napus L ◽  
Maximum Value ◽  
Plant Fertility ◽  
Number Of Seeds

Forty four testcross progenies obtained from crossing between five CMS and forty one candidate lines were evaluated both in field and laboratory condition to identify candidate restorer line(s). Nineteen testcross progenies were recorded as fully fertile with 100% plant fertility by counting the number of fertile plants from the total number of plants per lines. On the other hand from pollen fertility test, 11 testcross progenies [206A × 001(6), 9905A × 030(2), 9905A × 027(6) (0.57), 206A × 37(1) (0.68), 9904A × 027(4) (0.83), 248A × 020(6) (1.08), 248A × 018 (1.12), 248A × 022 (1.13), 248A × 017 (1.58), 248A × 038(2) (1.96) and 248A × 001(6) (2.02)] were found with 0-2.02% pollen sterility that could be mentioned as fertile or restorer lines for making hybrids. Agronomic performances were also satisfactory for these selected test cross progenies. The genotype 248A × 017 took the shortest time (30.00) for first flowering as well as ripening followed by 248A × 007(1). The highest number of pods per plant was observed in the testcross progeny 248A × 022 (649.59) and the highest number of seeds per pod (30.33) in 248A × 020(6). For seed weight per plant, 206A × 001(6) was recorded with maximum value (0.08g) while the lowest (23.33) number of seeds per plant was found in this progeny. In case of seed yield per plant, 248A × 022 gave the highest yield (30.30). The seed yield of the progenies 248A × 017 (23.49), 9905A × 027(6) (20.39), 248A × 001(6) (17.26), 9904A × 027(4) (17.02) and 248A × 038(2) (16.53) were also in the highest level.

EFFECTS OF METHOD AND RATE OF SEEDING ON YIELD OF BRASSICA NAPUS

1978 ◽  
Vol 58 (2) ◽  
pp. 549-550 ◽  
Author(s):  
J. M. CLARKE ◽  
F. R. CLARKE ◽  
G. M. SIMPSON
Keyword(s):  
Brassica Napus ◽  
Seed Weight ◽  
Brassica Napus L ◽  
Seeding Method ◽  
Number Of Seeds

Broadcast and drill seeding of Brassica napus L. were compared at four seeding rates. Drill-seeded material yielded more than broadcast-seeded material, particularly at the low seeding rates. Broadcast-seeded plants had more branches and pods than drill-seeded plants. Seeding method did not affect number of seeds per pod or 1,000-seed weight.

scholarly journals Estimation of heterosis for yield-related traits for single cross and three-way cross hybrids of oilseed rape (Brassica napus L.)

Euphytica ◽  
2019 ◽  
Vol 215 (10) ◽  
Author(s):  
Joanna Wolko ◽  
Agnieszka Dobrzycka ◽  
Jan Bocianowski ◽  
Iwona Bartkowiak-Broda
Keyword(s):  
Brassica Napus ◽  
Oilseed Rape ◽  
Seed Yield ◽  
Seed Weight ◽  
Single Cross ◽  
Positive Heterosis ◽  
Silique Length ◽  
Thousand Seed Weight ◽  
Number Of Seeds ◽  
Number Of Branches

Abstract Rapeseed breeding programs are focused mainly on improving plant potential and seed yield. One of the ways to improve seed yield in oilseed rape is heterosis, which is hybrid vigor that results in a greater biomass, increased seed yield, and faster development. The purpose of this study was to estimate yield-related trait heterosis for single cross and three-way cross hybrids of winter oilseed rape (Brassica napus L.). A population of 60 doubled-haploid (DH) lines and two generations of hybrids were evaluated in field trials to assess six yield-related traits: plant height, number of branches per plant, number of siliques per plant, silique length, number of seeds per silique, and thousand seed weight. Heterosis effects for each trait were estimated by a comparison of the particular hybrid with: (1) the trait mean over both parents—mid-parent heterosis and (2) to the value of better parent—best-parent heterosis. Traits with clear positive heterosis and traits with varied heterosis were observed in this study. For the first group, we include plant height, silique length, and the number of seeds per silique—a large number of hybrids expressed significant positive heterosis for these traits, independent from the year of observations and the type of hybrid. For the second group, with varied heterosis, we can include the number of branches and siliques per plant and thousand seed weight. For these traits, hybrids exhibited both positive and negative significant heterosis, without a clear pattern for the years and types of hybrids.

INFLUENCE OF IRRIGATION AND SEEDING RATES ON YIELD AND YIELD COMPONENTS OF BRASSICA NAPUS CV. TOWER

1978 ◽  
Vol 58 (3) ◽  
pp. 731-737 ◽  
Author(s):  
J. M. CLARKE ◽  
G. M. SIMPSON
Keyword(s):  
Brassica Napus ◽  
Yield Components ◽  
Seed Weight ◽  
Plant Morphology ◽  
Yield Component ◽  
Seeding Rate ◽  
Brassica Napus L ◽  
Relationship Of ◽  
The Relationship ◽  
Number Of Seeds

An analysis of the yield components of rape (Brassica napus L.) was carried out under field conditions for 2 yr at Saskatoon. Plant morphology and the crop environment were altered by the use of four planting densities and three water regimes. The number of branches per plant was scarcely affected by irrigation, but was reduced by high seeding rates. Number of pods per plant was increased by irrigation and reduced by high seeding rates. The number of seeds per pod was increased by irrigation, but reduced by high seeding rates. The 1,000-seed weight was increased both by irrigation and increased seeding rate, as was seed yield. Yield was positively correlated with 1,000-seed weight in both years. Yield component compensation was evident in the relationship of 1,000-seed weight to pod number and number of seeds per pod.

THE EFFECTS OF LEAF REMOVAL ON YIELD AND YIELD COMPONENTS OF BRASSICA NAPUS

1978 ◽  
Vol 58 (4) ◽  
pp. 1103-1105 ◽  
Author(s):  
J. M. CLARKE
Keyword(s):  
Brassica Napus ◽  
Seed Yield ◽  
Yield Components ◽  
Seed Weight ◽  
Field Conditions ◽  
Leaf Removal ◽  
Brassica Napus L ◽  
Yield And Yield Components

The effects of time of leaf removal on Brassica napus L. were studied under field conditions at Saskatoon in 1976 and at Swift Current in 1977. Leaf removal at the start of flowering reduced the number of pods per plant, increased seed weight, and reduced seed yield. Leaf removal at the end of flowering did not affect yield or its components.

scholarly journals INTRA-PLANT VARIATION IN NUMBER OF SEEDS PER POD AND SEED WEIGHT IN BRASSICA NAPUS ’TOWER’

1979 ◽  
Vol 59 (4) ◽  
pp. 959-962 ◽  
Author(s):  
JOHN M. CLARKE
Keyword(s):  
Brassica Napus ◽  
Seed Weight ◽  
Field Trials ◽  
Lower Branch ◽  
Seed Number ◽  
Brassica Napus L ◽  
Plant Variation ◽  
Developing Seeds ◽  
General Decline ◽  
Number Of Seeds

Field trials were conducted at Saskatoon in 1976, and at Swift Current in 1977, to investigate intra-plant variation in number of seeds per pod and seed weight in Brassica napus L. ’Tower’. Number of pods was greatest on the main raceme, least on the lowest branch. Seed number per pod was also highest on the main raceme, as was seed weight. In 1976, number of seeds per pod and seed weight were higher in pods from the lower half of the main raceme than from those on the upper half. A study of the trends in number of seeds per pod between the end of flowering and maturity revealed a general decline in number of seeds per pod and an increase in the number of aborted seeds at the lower branch positions. At the end of flowering, pods from all branch positions had equal numbers of developing seeds.

scholarly journals Genetic analysis of Plant Height, Yield Components and Seed Yield in Rapeseed (Brassica Napus L.) Cultivars

2014 ◽  
Vol 67 (1) ◽  
pp. 61-74
Author(s):  
Valiollah Rameeh
Keyword(s):  
Brassica Napus ◽  
Plant Height ◽  
Seed Yield ◽  
Combining Ability ◽  
Seed Weight ◽  
Main Axis ◽  
Brassica Napus L ◽  
Narrow Sense Heritability ◽  
Recessive Genes ◽  
Additive Genetic Effects

Abstract Half F2 diallel crosses of spring rapeseed (Brassica napus L.) varieties along with their parents were evaluated for plant height, first siliqua height, siliquae on main axis, siliquae per plant, 1000-seed weight and seed yield. The Analysis of variance based on Cockerham’s method revealed significant mean squares of general combining ability (GCA), specific combining ability (SCA) for all the traits indicating that both additive and non-additive genetic effects were involved in controlling these traits. Parent vs crosses mean square which is indicating average heterosis was significant for all the traits. In Hayman’s method the regression lines estimated for all the traits except plant height cut the Wr axis below the origin in the negative zone, suggesting the overdominance type of gene action for these traits except plant height. Based on the array points on the regression lines, 19H had maximum dominant genes for siliquae on main axis, siliquae per plant 1000-seed weight and seed yield, being closest to the origin, while 0ption500 possessed recessive genes for first siliqua height, siliquae per plant and 1000-seed weight, as evidenced by its distant position from the origin. Due to low narrow-sense heritability estimates for most of the traits, selection for improving these traits should be carried out in delayed segregating generations.

Genetic Variability, Correlation and Path Analysis in Advanced Lines of Rapeseed (Brassica Napus L.) for Yield Components

2014 ◽  
Vol 47 (1) ◽  
pp. 71-79 ◽  
Author(s):  
Ejaz Ul-Hasan ◽  
H.S.B. Mustafa ◽  
Tahira Bibi ◽  
T. Mahmood
Keyword(s):  
Brassica Napus ◽  
Path Analysis ◽  
Plant Height ◽  
Seed Yield ◽  
Yield Components ◽  
Seed Weight ◽  
Significant Positive Correlation ◽  
Brassica Napus L ◽  
Yield Improvement ◽  
Days To Maturity

ABSTRACT The present research was carried out to determine the best selection criteria for yield improvement in rapeseed (Brassica napus L.). Nine genotypes of Brassica napus were sown at Oilseeds Research Institute, Faisalabad, during the years 2011- 2012, to evaluate the means and components of variability (genotypic and phenotypic), heritability (h2 B.S), correlation (genotypic and phenotypic) and path analysis for yield and various yield components. At phenotypic and genotypic level, seed yield/plant had significant positive correlation with plant height, seeds/plant and siliqua/plant. A positive and highly significant genetic relationship was found between plant height and seeds/plant, siliqua length and seeds/siliqua, days to maturity and 1000 seed weight, days to flowering and seeds/plant, days to maturity and seeds/plant. Path coefficient revealed that the seeds/siliqua, 1000 seed weight, days to flowering, days to maturity and seeds/plant had direct positive contribution towards seed yield per plant. For rapeseed breeding seed per plant was the variable with maximum potential of selection for seed yield improvement because this trait possessed high h2 B.S, highly significant positive correlation and maximum positive direct effects with yield

scholarly journals Response of Some Soyabean Genotypes to Spraying with Potassium Silicate and Its effect on Yield and its Components, as Well as on Pod Worm Infestation Rate

2021 ◽  
pp. 38-52
Author(s):  
Nagat G. Abdallah ◽  
S. R. Nagib ◽  
Hoda E. A. Ibrahim
Keyword(s):  
Seed Yield ◽  
Seed Weight ◽  
Field Experiments ◽  
Foliar Spray ◽  
Potassium Silicate ◽  
The Other ◽  
Chl A ◽  
Worm Infestation ◽  
Seed Index ◽  
Number Of Seeds

A field experiments were conducted at Mallawy Agric. station, (latitude of 28 N, longitude of 30 E and altitude of 49 m above sea level), El-Minia Governorate, Egypt, during two successive growing seasons (2019 /2020) to study the effect of different concentrations of potassium silicate (P.Si), 0,3,6 and 9cm3/L foliar spray, under four soyabean genotypes, i.e. Giza 111, Giza22, Line3(H3L119 selected from Giza82) and Line7(H4L130 selected from Giza83) on yield ,its attributes and seed chemical analysis as well as pod warm infestation. The results indicated that, in both seasons foliar spraying of potassium silicate had highly significant effect on all studied character except seed index (S.I.). The concentration (6 cm3/L.) gave the highest values of seed yield (S.Y./F.) at 31.8 and 31.2% in the two seasons, respectively, as compared to control, as well as decreased the pod worm infestation (P.W.%) by 64.85% average both seasons. In the other hand Giza 22 surpassed the other genotypes regarding most characters, also the interaction between potassium silicate and soyabean genotypes had significant effect for all studied traits in both seasons, except seed weight/plant(S.W.) in the first season, the best values for all traits were obtained by foliar spraying of potassium silicate(6 cm3/L.) with Giza 22, furthermore the interaction ships among seed yield and its attributes through simple correlation( r) and regression(b) analysis were evaluated. Regarding correlation coefficients the seed yield was positively and significantly correlated with number of seeds /plant (No.S/P), number of pods plant-1 (No.p/p), Seed weight/ plant and seed index A strong correlation of seed yield with these traits indicated that, simultaneous improvement of these traits is possible. These findings indicate that selection for each of number of seeds plant-1, number of pods plant-1, seed weight/ plant and 1000-seed weight would be accompanied by high yielding ability under such conditions. Also, the seed yield was positively and significantly correlated with quantity traits Protein percent, oil percent, chlorophyl a (chl,a) + b (chl,b) and carotin(crt.), using silicon may be involved in cell elongation and/or cell division. negative and significant correlations were observed between seed yield (ton/fed.) and each of Infestation pods (P.W.%) and seeds (S.W.%) with pod worm percent. Decrease in these traits will ultimately Increase the seed yield. Regression procedure indicated that 6cm3/L. of potassium silicate gave the highest yield and yield components and reduce the pod worm infestation.

scholarly journals Interrelationship between yield and yield related traits of spring canola (Brassica napus L.) genotypes

Genetika ◽  
2007 ◽  
Vol 39 (3) ◽  
pp. 325-332 ◽  
Author(s):  
Sonja Ivanovska ◽  
Cane Stojkovski ◽  
Zoran Dimov ◽  
Ana Marjanovic-Jeromela ◽  
Mirjana Jankulovska ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Seed Yield ◽  
Seed Weight ◽  
Coefficient Of Determination ◽  
Path Coefficient ◽  
Path Coefficient Analysis ◽  
Brassica Napus L ◽  
Plant Seed ◽  
Spring Canola ◽  
Pod Length

The research was conducted in order to determine yield related characters which are more effective as selection criteria than yield itself. Three spring canola (Brassica napus L.) genotypes have been investigated for plant height, number of primary branches (including the main raceme), number of pods per plant, pod length, number of seeds per pod, seed weight per pod and 1000 seed weight and their correlations with seed yield per plant. Seed yield had highest correlation with number of pods per plant (r= 0.935 and r= 0.973 in Skopje and Strumica, respectively), followed by seed weight per pod (r= 0.693 and r= 0.729) and 1000 seed weight (r= 0.627 and r= 0.680). Path coefficient analysis was used to identify the direct and indirect effect of studied characters on seed yield. Number of pods per plant (p=0.759 and p=0.877 for Skopje and Strumica, respectively) and seed weight per pod (p=0.216 and p=0.225) had the highest direct effect on seed yield in both locations followed by 1000 seed weight (p=0.056 and p=0.010). The coefficient of determination (R2) was 0.943.

Interrelationships Among Grain Yield and Related Traits of Candidate Restorer Lines of Brassica Napus L.

2021 ◽  
Vol 24 (1) ◽  
pp. 51-64
Author(s):  
AKM Aminul Islam ◽  
NK Chowdhury ◽  
FM Era ◽  
MG Rasul
Keyword(s):  
Brassica Napus ◽  
Seed Yield ◽  
Coefficient Of Variation ◽  
Seed Weight ◽  
Agronomic Traits ◽  
Path Coefficient ◽  
Phenotypic Effect ◽  
Wide Range ◽  
Pod Length ◽  
Number Of Seeds

Forty-three candidate restorer lines of Brassica napus were evaluated for 11 agronomic traits for genetic variability and interrelationships among yield traits to find out yield contributing traits. A wide range of variability and character association was observed among the lines. The line BNR-017 took the lowest time for first (26.67 days) and 100% flowering (41.00 days) whereas BNR-031 (74.33 days) and BNR-034 (74.00 days) matured earlier. The lines BNR-022 (1.07m) and BNR-026 (1.02m) were found with the shortest plant stature and all other lines were in average plant height of around 1.35m. The lines BNR-039, BNR-011, BNR-001, BNR-013 and BNR-014 were found the best performer for number of pods per plant, seeds per pod and seed yield per plant. Estimates of genotypic and phenotypic coefficient of variation were high (≥30%) for seed yield per plant (30.52 and 33.13, respectively). High broad sense heritability was recorded for 1000-seed weight (97.69%), days to ripening (97.12%), days to first flowering (96.80%), days to 100% flowering (95.50%) and pod length (92.74%). Significant and negative correlation was observed between seed yield per plant and number of seeds per pod, -0.217* and -0.192*, respectively both at genotypic and phenotypic level, while the highest positive and significant genotypic (0.786**) and phenotypic (0.795**) correlation were found with pod length. Path co-efficient analysis showed the highest positive and direct phenotypic effect of number of seeds per pod (1.221) on seed yield per plant while days to first flowering had the maximum negative direct effect (-0.039). The results of genotypic and phenotypic coefficient of variation, heritability and genetic advance in percent of mean, correlation co-efficient and path coefficient revealed that pods per plant, pod length, seeds per pod and 1000-seed weight could be used as selection criteria to increase seed yield in rapeseed. Ann. Bangladesh Agric. (2020) 24(1) : 51-64

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