Spatial distribution of sunflower cultivars and the relationship between growth features

Martin, Thomas Newton; Pavinato, Paulo Sérgio; Lorentz, Leandro Homrich; Zielinski, Renice Paula; Refatti, Rosana

doi:10.1590/s1806-66902012000200017

Cited by 11 publications

(11 citation statements)

References 20 publications

(12 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Sunflower ( Helianthus annusus L.) is an oilseed crop that belongs to the family Asteraceae . It is easily distinguished from other cultivated crops by its single stem and very prominent inflorescence called ‘capitulum’ and it is quite rustic and very adaptable to diverse environmental conditions and management practices (Martin et al , ). According to Rosa et al (), sunflower is grown principally for its seed that contains oil (36–52%) and protein (28–32%).…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, mean head diameter and size of seeds from multiple heads are usually smaller than those from single heads (Weiss, ). The non‐genetic factors affecting seed size and vigour are mainly number of plants per hectare and growth conditions of mother plant, physiological maturity of the seed at harvest and post harvest handling of the seeds (Martin et al , ). Reports in literature have shown that seed size affects seed germination, seed vigour and yield of crops differently depending on the crop species.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Seed yield, head characteristics and oil content in sunflower varieties as influenced by seeds from single and multiple headed plants under humid tropical conditions

Olowe

Folarin

Adeniregun

et al. 2013

Annals of Applied Biology

View full text Add to dashboard Cite

Field trials were conducted during 2004 and 2005 to determine the effect of sowing seeds from plants with multiple heads and seeds from single headed plants of sunflower on seed yield, head characteristics and oil content of three widely grown open pollinated varieties (Funtua, Record and Isaanka) in the humid forest -savanna transition zone which is outside the current growing areas with a view to improving stability and sunflower productivity in this region. Seeds from multiple headed plants produced plants that flowered and matured 2-3 days later than plants from single headed plants. Apart from days to flowering in 2004, number of days to maturity and plant height were affected independently by variety and seed source factors. However, the seeds from single headed plants produced plants that recorded significantly (P < 0.01) higher head weight, head diameter, achene weight and number per head than plants from seeds of plants with multiple heads. Seed source had little effect on sunflower seed yield and oil content. However, Funtua produced significantly (P < 0.05) high seed yield (1956.0 kg ha −1 ± 76.06) when seeds from plants with multiple heads were sown, while Isaanka recorded comparatively high seed yield from seeds of plants from either multiple (1221.0 kg ha −1 ± 165.90) or single heads (1388.0 kg ha −1 ± 135.84) and Record (1201.0 kg ha −1 ± 96.97) when seeds from single headed plants were sown. Therefore, it is recommended that prospective sunflower growers who wish to cultivate Isaanka, can sow seeds from either the multiple or single head and preferably the multiple head for Funtua, and single head for Record.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Seed yield, head characteristics and oil content in sunflower varieties as influenced by seeds from single and multiple headed plants under humid tropical conditions

Olowe

Folarin

Adeniregun

et al. 2013

Annals of Applied Biology

View full text Add to dashboard Cite

show abstract

“…A study by Toebe and Cargnelutti Filho (2013) on evaluation of multivariate non-normality and multicollinearity in trail analysis in maize crop, showed that the adverse effects of the high degree of multicollinearity are greater than the violation of the multivariate normality assumption. The elimination of variables to circumvent the violation of the multicollinearity assumption was also performed in corn by Collado et al (2011) and sunflower by Martin et al (2012).…”

Section: Introductionmentioning

confidence: 99%

Relationship between physical and physiological quality variables in analyzes of black oat seeds

Carbonera¹,

Lucio²,

Nunes³

et al. 2017

Afr. J. Agric. Res.

View full text Add to dashboard Cite

The success of species implantation depends on the quality of seeds used initially. It is therefore important to ascertain that the seed is in an excellent physical, physiological, sanitary and nutritional condition as this will determine the genetic cultivars' potential. Thus, this research work studied the relationships between physical and physiological variables in the seed. Samples were analysed and grouped according to their similarities. A total of 2,586 black oat seed samples were studied, 2,229 were samples of the seed production process and 357 were samples of their own use, and analyzed in the laboratory of the Agronomy Course of Unijuí, Ijuí, RS. Pearson's linear correlation coefficients, multicollinearity analysis, track and cluster analysis was determined by the agglomerative method of the most distant neighbor. The normal seedlings showed the highest correlation of negative signs, and direct effect with dead seeds. The multicollinearity analysis indicated a severe condition number, influenced by the percentage of pure seeds and number of other seeds per number. Three groups of samples were identified in the seeds produced according to the national seed system and four groups in seeds for their own use. The most representative groups presented the highest physical and physiological qualities. The variable, dead seeds, was the one that influenced the germination of normal seedlings most.

show abstract

“…The first two characteristics are associated with lodging, the number of leaves is associated with the photosynthetic capacity of the plant, and the head diameter is related to seed yield (AMJADIAN;FARSHADFAR;GHOLIPOOR, 2013;JAGADEESAN et al, 2008;YASIN;SINGH, 2010). Several authors (AHMAD; AHMED; TAHIR, 2012;MARTIN et al, 2012) have evaluated these characteristics, reflecting their importance.…”

Section: Introductionmentioning

confidence: 99%

Sample size and sampling method for evaluation of characteristics of the sunflower1

et al. 2015

View full text Add to dashboard Cite

-In the sunflower, in addition to seed yield, it is of interest to evaluate number of leaves plant -1 , head diameter, stem diameter and plant height, since these characteristics may be associated with seed yield or lodging. The objective of the work was to determine the optimal sample size (from which the experimental coefficient of variation, CV, can be established) for evaluation of these four characteristics. Fifteen cultivars were evaluated in an experimental design of randomized blocks with ten replications. The characteristics were evaluated using two sampling methods (in a single row of plants or in the two rows from the useable area of each plot) and sample sizes of from two to 18 sampling units, with an interval of two plants. In the two sampling methods, the experimental accuracy, as measured by the CV, increased with increasing sample size. A sample made up of ten sampling units is suitable for assessing the number of leaves, the diameters of the head and stem, and the plant height in cultivars of the sunflower. From this sample size upwards, additional gains in experimental precision are not obtained. This sample size can be used to evaluate plants in a single row or in two rows taken from the useable area of each plot, since there was virtually no difference between sampling methods with regard to experimental accuracy. However, it is most practical and quick to sample in one row of plants. RESUMO -No girassol, além do rendimento de sementes, existe interesse na avaliação do número de folhas, dos diâmetros do capítulo e do caule e da altura da planta, e porque estas características podem estar associadas com o rendimento de sementes ou com o acamamento. O objetivo do trabalho foi determinar o tamanho ideal da amostra (a partir do qual o coeficiente de variação experimental, CV, se estabiliza) para avaliação das quatro características referidas. Quinze cultivares foram avaliadas no delineamento experimental de blocos ao acaso com dez repetições. As características foram avaliadas com dois métodos de amostragem (em uma só fileira de plantas ou nas duas fileiras da área útil da parcela) e tamanhos amostrais de duas a 18 unidades amostrais, com intervalos de duas plantas. Nos dois métodos de amostragem, a precisão experimental, medida pelo CV, aumentou com o aumento do tamanho da amostra. Uma amostra formada por dez unidades amostrais é adequada para avaliação do número de folhas, dos diâmetros do capítulo e do caule e da altura da planta de cultivares de girassol. A partir deste tamanho amostral não se obtém ganhos adicionais na precisão experimental. Este tamanho amostral pode ser usado com a avaliação de plantas em uma só fileira ou em duas fileiras da área útil da parcela, desde que, com ele praticamente não existiram diferenças entre métodos de amostragem, no que se refere à precisão experimental. Contudo, é mais prático e rápido fazer a amostragem em uma só fileira de plantas. Palavras-chave:Helianthus annuus L.. Altura da planta. Número de folhas. Diâmetro do caule. Diâmetro do capít...

show abstract

Spatial distribution of sunflower cultivars and the relationship between growth features

Cited by 11 publications

References 20 publications

Seed yield, head characteristics and oil content in sunflower varieties as influenced by seeds from single and multiple headed plants under humid tropical conditions

Seed yield, head characteristics and oil content in sunflower varieties as influenced by seeds from single and multiple headed plants under humid tropical conditions

Relationship between physical and physiological quality variables in analyzes of black oat seeds

Sample size and sampling method for evaluation of characteristics of the sunflower1

Contact Info

Product

Resources

About