Plasticity of seed weight compensates reductions in seed number of oilseed rape in response to shading at flowering

2017 ◽  
Vol 84 ◽  
pp. 113-124 ◽  
Author(s):  
Marcelo H. Labra ◽  
Paul C. Struik ◽  
Jochem B. Evers ◽  
Daniel F. Calderini
Keyword(s):  
Oilseed Rape ◽  
Seed Weight ◽  
Seed Number

scholarly journals Sowing Date and Rate Effect on Winter Oilseed Rape (Brassica napus L.) Yield Components’ Formation

2016 ◽  
Vol 70 (6) ◽  
pp. 384-392 ◽  
Author(s):  
Oskars Balodis ◽  
Zinta Gaile
Keyword(s):  
Oilseed Rape ◽  
Yield Components ◽  
Seed Weight ◽  
Plant Density ◽  
Plant Productivity ◽  
Sowing Date ◽  
Individual Plant ◽  
Seed Number ◽  
Winter Oilseed Rape ◽  
Pod Number

Abstract Crop yield per area is the product of plant density and productivity of an individual plant. Plant density and the time of winter oilseed rape sowing influences yield components (parameters of individual plant productivity), such as pod number per plant, seed number per pod, plant productivity, seed weight, and plant branching. The aim of this three-year (2008–2010) study was to investigate winter oilseed rape yield components depending on sowing date (five sowing dates) and sowing rate (four sowing rates for each variety) as initial cause of plant density at harvest for two type winter oilseed rape varieties (open pollinated ‘Californium’ and hybrid ‘Excalibur’). Field trials were carried out at the Research and Study Farm “Vecauce” of the Latvia University of Agriculture. Winter oilseed rape yield components (pod number per plant and seed number per pod, plant productivity (seed number per plant and plant productivity in g) as well as the number of primary branches per plant) were affected (p < 0.05) by sowing date and rate for both varieties. In general, no significant effect of sowing rate on 1000-seed weight was observed (p > 0.05), but sowing date influenced this component significantly (p < 0.05). A yield compensation mechanism was demonstrated by significant (p < 0.05) negative correlations between plant density at harvest and parameters of individual plant productivity.

scholarly journals Action of growth regulators on production of soybean cultivar Davis

1981 ◽  
Vol 38 (1) ◽  
pp. 127-138 ◽  
Author(s):  
Paulo R.C. Castro ◽  
Roberto S. Moraes
Keyword(s):  
Glycine Max ◽  
Gibberellic Acid ◽  
Growth Regulators ◽  
Seed Weight ◽  
Dry Weight ◽  
Soybean Plant ◽  
Trimethylammonium Chloride ◽  
Seed Number ◽  
Exogenous Growth ◽  
Soybean Plants

This research deals with the effects of exogenous growth regulators on production of soybean plant (Glycine max cv.. Davis) under greenhouse conditions, At the flower anthesis, 2,3,5-triiodobenzoic acid (TIBA) 20 ppm was applied. Other two applications with TiBA, with intervals of four days, were realized. Before flowering, Agrostemin (1 g/10 ml/3 1), gibberellic acid (GA) 100 ppm, and (2-chloroethyl) trimethylammonium chloride (CCC) 2,000 ppm were applied. It was observed that CCC and TIBA reduced stem dry weight. Soybean plants treated with TIBA reduced weight of pods without seeds , seed number and seed weight.

Identification of a major QTL for silique length and seed weight in oilseed rape (Brassica napus L.)

2012 ◽  
Vol 125 (2) ◽  
pp. 285-296 ◽  
Author(s):  
Pu Yang ◽  
Chang Shu ◽  
Lin Chen ◽  
Jinsong Xu ◽  
Jiangsheng Wu ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Oilseed Rape ◽  
Seed Weight ◽  
Brassica Napus L ◽  
Silique Length ◽  
Major Qtl

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.

The optimum foliar zinc source and level for improving Zn content in seed of chickpea

2015 ◽  
Vol 38 (6) ◽  
Author(s):  
Nihal Kayan ◽  
Nurdilek Gulmezoglu ◽  
Mehmet Demir Kaya
Keyword(s):  
Plant Height ◽  
Seed Yield ◽  
Yield Components ◽  
Seed Weight ◽  
Harvest Index ◽  
Foliar Application ◽  
Seed Number ◽  
Plant Seed ◽  
Zn Content ◽  
Pod Number

The comparative effect of 0, 0.2, 0.4, 0.6 and 0.8% Zn levels of zinc chelate (Zn-EDTA; 8% Zn) and zinc sulfate (23% Zn) applied as foliar sprays for assuaging zinc deficiency of chickpea cv. Gökçe was evaluated under field condition. The sprays were applied on the plants before blooming stage during 2012 and 2013 growing seasons and seed yield, yield components like plant height, pod number per plant, seed number per plant, hundred seed weight, harvest index and mineral concentrations (nitrogen, phosphorus, zinc and iron) in seeds were investigated. Plant height, pod number per plant, seed number per plant, hundred seed weight, harvest index and seed yield were investigated. The results showed that increased zinc doses caused an increase in Zn content of seed, while seed yield was not affected similarly. In general, plant height, pod number and seed number per plant increased by the application of zinc. Lower dose of Zn-EDTA and higher dose of ZnSO<sub>4</sub> gave higher yield components. Seed weight, harvest index and seed yield were not significantly influenced by Zn sources and doses; however, mineral concentration of seeds enhanced when Zn doses were increased. It was concluded that foliar application of zinc resulted in an increase in seed mineral contents rather than seed yield of chickpea. The dose of 0.6% with Zn-EDTA was the optimum combination for Zn enrichment in seed of chickpea.

Effects of Green-stage Grazing on Rainfed Barley in Northern Syria. I. Tiller Production and Other Agronomic Characters

1989 ◽  
Vol 25 (4) ◽  
pp. 493-500 ◽  
Author(s):  
S. K. Yau ◽  
M. S. Mekni ◽  
I. Naji
Keyword(s):  
Plant Height ◽  
Seed Weight ◽  
Unit Area ◽  
Seed Number ◽  
Agronomic Characters ◽  
Barley Landraces ◽  
Green Stage ◽  
Tiller Mortality

SUMMARYEffects of simulated and actual grazing at the tillering stage on tiller production and other agronomic characters were studied over a number of seasons at two sites in northern Syria with two local barley landraces. In general, grazing encouraged tiller production but reduced head number per unit area because of a higher tiller mortality or infertility. Seed number per head and seed weight were not affected by grazing except in one season. Grazing delayed heading and maturity and reduced plant height. Simulated and actual grazing produced similar effects on the different characters investigated.

scholarly journals Effect of Chlorocholine Chloride and Triazoles – Tebuconazole and Flusilazole on Winter Oilseed Rape (Brassica Napus Var. Oleifera L.) in Response to the Application Term and Sowing Density

2013 ◽  
Vol 53 (1) ◽  
pp. 79-88 ◽  
Author(s):  
Kinga Matysiak ◽  
Sylwia Kaczmarek
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Oilseed Rape ◽  
Growth Regulators ◽  
Plant Density ◽  
Positive Impact ◽  
Weather Conditions ◽  
Seed Number ◽  
Winter Oilseed Rape ◽  
Chlorocholine Chloride

Abstract Winter oilseed rape is strongly responsive to changes in the plant density. Any change in plant density significantly affects the morphological characteristics and yield of the crop. In addition, plant growth habit can be modified by the use of plant growth regulators. Apart from plant growth regulators like eg. chlorocholine chloride some triazoles have dual properties (fungicide and plant growth regulator) eg. tebuconazole. The trials were carried out in the years 2006-2008 at the Institute of Plant Protection - National Research Institute in Poznan (Poland). The treatments consisted of chlorocholine chloride, tebuconazole and flusilazole applied in spring at the growth stage BBCH 30 and BBCH 50 of winter oilseed rape. The field trials were conducted with two sowing densities of winter oilseed rape: 60 seeds/ m2 and 120 seeds/m2. The vegetation seasons varied according to the weather conditions, and the second testing year was characterised by drought in May and June. In the experiments plant height, SPAD units, number of siliques per plant, seed number per silique, weight of thousand seeds, yield, protein and fat content in the seeds were estimated. The increase of silique numbers per plant appeared only at the lower sowing density as a result of the application of tebuconazole or a mixture of tebuconazole with CCC. Flusilazole had a positive impact on seed number per silique. At both sowing densities, changes in the weight of a thousand seeds under the influence of the test preparations, were observed only in that year which had wet weather conditions. A more favourable effect of the test substances on the weight of a thousand seeds was obtained at the lower sowing density. All the tested substances positively affected SPAD unit values at the lower sowing density. At the higher sowing density, SPAD unit values increased after the application of flusilazole, and after a mixture of CCC + tebuconazole. The tested substances had a positive impact on plant yield but they did not affect the protein and fat content in oilseed rape seeds.

scholarly journals Winter Oilseed Rape (Brassica napus L.) Yield Components in Agro–ecological Conditions of Banja Luka Region

2018 ◽  
Vol 18 (3) ◽  
pp. 175
Author(s):  
Danijela Kondić ◽  
Đurađ Hajder ◽  
Saša Marinković ◽  
Miloš Nožinić
Keyword(s):  
Oilseed Rape ◽  
Yield Components ◽  
Seed Weight ◽  
Seed Mass ◽  
Index Number ◽  
Total Production ◽  
Important Species ◽  
Ecological Conditions ◽  
Growing Seasons ◽  
Banja Luka

Due to its numerous agricultural and industrial purposes, oilseed rape is a very important species. The total production of oilseed rape in the Republic of Srpska is faced with noticeable variation throughout years, with an increase in last three years. The oilseed rape yield is strongly influenced by environmental factors. The objective of this study was to analyze yield components of oilseed rape in agro–ecological conditions of Banja Luka. Four oilseed rape hybrids were used: PR46W21, PR46W20, PR46W14 and PR45DO3 in two growing seasons: 2012/13 and 2013/14. Yield components tested were: pod mass (g), seed mass per pod (g), pod index (%), number of seeds per pod and 1000–seed weight (g). Factorial 2×4 ANOVA and Fisher's LSD test were used to analyze data, with growing seasons (years) and hybrids as factors. Growing season significantly affected the pod mass (g), total seed mass per pod (g) and 1000–seed weight. Generally, higher yield component values were obtained in the second examined year (2013/14).

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