Performance of Two Rape (<i>Brassica napus</i>) Cultivars under Different Fertilizer Management Levels in the Smallholder Sector of Zimbabwe

Ganya, S.; Svotwa, Ezekia; Katsaruware, Rumbidzai Debra

doi:10.1155/2018/2351204

Cited by 7 publications

(5 citation statements)

References 17 publications

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“…Ascona (breeder: SW Seed, New South Wales, Australia), Pirola (breeder: KWS, New South Wales, Australia), Milena (breeder: KWS, New South Wales, Australia) and Pacific (breeder: Limagrain-Nickerson, Lincolnshire, UK) are canola quality lines and widely cultivated [ 63 ]. English Giant (breeder: Afrigro Seed Company, Oudtshoorn, South Africa) is one of the most popular lines in Zimbabwe (favourable because of its hardness) [ 64 ], Tina and Wilhelmsburger (type: swede) are resistant to the pathogen Plasmodiophora brassicae [ 65 , 66 ] and HANSEN × GASPARD DH LINE (breeder: KWS, New South Wales, Australia) is partially resistant to Sclerotinia sclerotiorum [ 67 ]. Tina was released in the early 1980s [ 65 ], Wilhelmsburger [ 68 ] and English Giant [ 69 ] were used in the 1960s and the rest of the varieties were available no later than 2010 [ 63 , 70 ].…”

Section: Methodsmentioning

confidence: 99%

Copy Number Variation among Resistance Genes Analogues in Brassica napus

Dolatabadian

Yuan

Bayer

et al. 2022

Genes

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Copy number variations (CNVs) are defined as deletions, duplications and insertions among individuals of a species. There is growing evidence that CNV is a major factor underlining various autoimmune disorders and diseases in humans; however, in plants, especially oilseed crops, the role of CNVs in disease resistance is not well studied. Here, we investigate the genome-wide diversity and genetic properties of CNVs in resistance gene analogues (RGAs) across eight Brassica napus lines. A total of 1137 CNV events (704 deletions and 433 duplications) were detected across 563 RGAs. The results show CNVs are more likely to occur across clustered RGAs compared to singletons. In addition, 112 RGAs were linked to a blackleg resistance QTL, of which 25 were affected by CNV. Overall, we show that the presence and abundance of CNVs differ between lines, suggesting that in B. napus, the distribution of CNVs depends on genetic background. Our findings advance the understanding of CNV as an important type of genomic structural variation in B. napus and provide a resource to support breeding of advanced canola lines.

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Section: Methodsmentioning

confidence: 99%

Copy Number Variation among Resistance Genes Analogues in Brassica napus

Dolatabadian

Yuan

Bayer

et al. 2022

Genes

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“…This applies to both the optimisation of soil and foliar fertilisation. According to Ganya et al (2018) and Amiri et al (2020), the effects of foliar fertilisation vary depending on the date of application and dose, and are modified by climatic conditions.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Microorganisms and Inorganic Preparations Applied into the Soil and Leaves on the Yield of Winter Rape (<i>Brassica Napus</i> L.)

Sikorska,

Gugała,

Zarzecka

et al. 2024

J. Ecol. Eng.

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The research was carried out in 2018-2021 at the Agricultural Experimental Station, in Poland. The factors of the experiment were three morphotypes of winter oilseed rape: population morphotype, long-stemmed morphotype, semi-dwarf morphotype. The second factor of the experiment corresponded to three ways of using the preparations: 1. Control variant, 2. Organic preparation (Ugmax) 3. Biostimulator containing P₂0₅ and K₂O, 4. Biostimulator containing silicon. The aim of the study was the reaction of three morphotypes of winter rape to soil and foliar application of microorganisms as well as inorganic preparations in different growing seasons. Elements of yield structure and yielding of winter rape were determined by a genetic factor. In all growing seasons, the best yielding was in the restored hybrid with the traditional type of growth, while the seed yield of the semi-dwarf form was lower by 5.8% on average, and by 10.0% on average in the population form. The number of seeds in the pod and the value of the yield index (HI) was the most favourable in the restored forms, and the thousand-seed weight and yield in the population form. The preparations applied to the soil and leaves increased the parameters of yield structure and yielding in all tested cultivars. Soil preparation with microorganisms as well as micro and macro elements applied in autumn before sowing seeds and in spring in the BBCH 21-36 phase significantly increased the number of seeds per pod by 3.4% on average; weight of a thousand seeds by 3.5% on average, seed yield by 15.7% on average, straw yield by 4.5% on average compared to the control variant. The ratio of seed yield-to-biomass yield was higher in the heterosis cultivars by an average of 9.2% compared to the population cultivar. The elements of the yield structure as well as the main and by-products were the highest in the growing season with the highest annual rainfall and the highest average air temperature.

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“…4 In the southern African context, like in Zimbabwe, oilseed rape (Brassica napus L.) is grown for its leaves and is one of the primary vegetable crops due to its high profitability, all-year round production and its short lifespan as compared to other leafy vegetables. 5 However, oilseed rape has high nutrient requirements which can be met through mineral and/or organic fertiliser applications to attain optimum yield. 6 Resultantly, continuous cropping without sufficient nutrient replenishment reduces productivity and poses a serious threat to the sustainable use of soil.…”

Section: Introductionmentioning

confidence: 99%

“…Soil infertility characterised by nutrient deficiencies, soil acidity and declining soil organic matter has been recognised as the fundamental biophysical constraint to crop productivity among smallholder farms, 7 thus various efforts have been directed towards addressing this problem. Ganya et al 5 showed that nitrogen fertilisation at increasing rates significantly increases oilseed rape biomass yield, while leguminous trees' biomass yields have been tested in isolation and in combination with N-fertiliser with positive results. 8,9 However, the prohibitive prices of mineral fertilisers 10 and risk of soil acidification 11 may discourage its recommendation.…”

Section: Introductionmentioning

confidence: 99%

Nutrient uptake, yield and taste of oilseed rape (Brassica napus L.) and soil chemical properties following amendment with uncomposted and composted tobacco waste and cattle manure

et al. 2020

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The inadequacy of the nutrient supply of most tropical and sub-tropical soils may be curbed through organic material recycling, thus reducing the need for mineral fertiliser use. To promote tobacco waste recycling in a smallholder food-cash crop production system, nutrient uptake, dry biomass yield and taste of oilseed rape (Brassica napus L.) and soil chemical properties were determined on a sandy loam soil under field conditions. The experiment was a randomised complete block design with three blocks and eight treatments, namely, control (no amendment), mineral fertiliser (121, 30.8, 24.6 kg/ha N, P and K, respectively), uncomposted tobacco leaf scrap (TSC) and compost of TSC and cattle manure (TSC-CM) at 5, 20 and 40 t/ha. N, P and K uptake and dry biomass yield of oilseed rape were higher (p<0.05) than control with 40 t/ha TSC-CM and mineral fertiliser application at 3 weeks after transplanting (WAT), while significant improvements with TSC were observed from 5 WAT. Mineral N, extractable P and exchangeable K were higher than control with TSC-CM at 20 t/ha and 40 t/ha at 3 WAT, and higher with TSC at 9 WAT. Soil organic carbon was more improved with TSC application than TSC-CM at 9 WAT. Organoleptic testing revealed an intensely bitter taste in oilseed rape with mineral fertiliser, 20 t/ha and 40 t/ha TSC at 3 WAT, although it diminished with time. A trade-off of nutrient uptake, yield, taste of oilseed rape and soil properties improvement is attainable with application of TSC-CM at 40 t/ha, while if composting is not feasible, TSC application at 20 t/ha is a viable alternative. Thus, judicious utilisation of tobacco waste offers a viable solution to the problem of low soil fertility on sandy soils and can reduce the need for mineral fertiliser use, while promising sustainable soil management.

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Performance of Two Rape (Brassica napus) Cultivars under Different Fertilizer Management Levels in the Smallholder Sector of Zimbabwe

Cited by 7 publications

References 17 publications

Copy Number Variation among Resistance Genes Analogues in Brassica napus

Copy Number Variation among Resistance Genes Analogues in Brassica napus

The Effect of Microorganisms and Inorganic Preparations Applied into the Soil and Leaves on the Yield of Winter Rape (<i>Brassica Napus</i> L.)

Nutrient uptake, yield and taste of oilseed rape (Brassica napus L.) and soil chemical properties following amendment with uncomposted and composted tobacco waste and cattle manure

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