Multivariate analysis and vigor tests to determine the quality of Brachiaria
            decumbens seeds

Silva, Givanildo Zildo da; Martins, Cibele Chalita; Bruno, Riselane de Lucena Alcântara; Pereira, Francisco Élder Carlos Bezerra; Jeromini, Tatiane Sanches

doi:10.5935/1806-6690.20190034

Cited by 4 publications

(4 citation statements)

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“…The accumulated variance close to 70% was verified in studies on vigor tests for seeds of other species, for example soybean (Barbosa et al, 2013) and Urochloa decumbens (Silva et al, 2019), whose value was indicated by Rencher & Christensen (2012) for determining the number of components to be adopted.…”

Section: /7mentioning

confidence: 66%

Cold test on the vigor determination of Carthamus tinctorius L. seeds

Coelho

Silva

et al. 2021

Agraria

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In evaluating the quality of seed lots, vigor tests are complementary to the germination test, identifying differences in their degree of deterioration. However, for safflower seeds (Carthamus tinctorius L.) there is little information regarding these tests. Thus, the objective was to adapt the cold test methodology to evaluate the vigor of safflower seeds. For that, twelve lots were initially characterized by moisture content, mass of one thousand seeds, germination and seedling emergence in the field. After characterization the samples were conditioned in transparent plastic boxes on paper moistened with water and kept at 10 °C for the periods of 0, 3, 5 and 7 days. After the conditioning periods the samples were transferred to a germination chamber at 25 ºC, with evaluation of normal seedlings on the 3rd day. The obtained data was subjected to variation analysis and when significant, compared by the Scott-Knott method at 5% probability. To verify the efficiency of the methodologies, the principal component analysis was performed. The cold testing at 10 °C for 7 days is recommended for evaluating the physiological quality of safflower seeds.

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Section: /7mentioning

confidence: 66%

Cold test on the vigor determination of Carthamus tinctorius L. seeds

Coelho

Silva

et al. 2021

Agraria

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“…Therefore, each species has different germination responses due to ecological adaptation to the places of origin, so, a large number of lots should be used to assure the results of studies on the evaluation of germination methods (G. Z. da Silva et al, 2017Silva et al, , 2019Pereira et al, 2020).…”

Section: Germination and First Count Testmentioning

confidence: 99%

“…Due to the advantages presented, the envelope method needs to be evaluated for other species, particularly those with small seed sizes, such as Mombasa grass (MAPA, 2009). The use of as many lots as possible, in this method, is one point that should be carefully analyzed in the establishment of tests to evaluate the physiological quality of seeds because the test should be developed to be used with lots with different levels of vigor (G. Z. da Silva, Martins, Cruz, Jeromini, & Bruno, 2017;G. Z. da Silva, Martins, Bruno, Pereira, & Jeromini, 2019;Pereira et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Envelope method for the germination test of Mombasa grass

Jeromini¹,

Botassini²,

Barros³

et al. 2021

Semina: Ciênc. Agrár.

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The Rules for Seed Analysis reports the use of a paper envelope to allow use of the germination test with small seeds but does not provide any method or use recommendation. As Mombasa grass has high quality and commercial importance, the objective of this study was to evaluate the viability of the envelope method in the germination test of Mombasa grass seeds, with the aim of achieving greater result accuracy and improvement of seed quality analysis processes in laboratories. The germination of eight lots of Mombasa grass seeds was evaluated with two sowing methods (on paper and in paper envelope). The moisture content and the first germination count were also determined. The experiment was conducted with a completely randomized design. The data were analyzed in a 2 x 8 factor scheme (sowing methods x lots), with four repetitions. The data were subjected to analysis of variance using the F test and when significant, treatment means were compared using the Tukey’s test at 5% probability. Results showed that the envelope method is efficient for the germination test of Mombasa grass seeds and can be easily used by seed analysis laboratories, as it present results equivalent or superior to those obtained using the traditional method on paper, while occupying only 2/5 of the germination chamber space used in the conventional method.

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“…Genetic gains and genotype selection using PCA has been reported for several crops, such as snap beans (Oliveira et al 2018), coffee (Zambolim et al 2016), soybeans (Andrade et al 2016), and sunflowers (Santos et al 2018). In Urochloa, PCA has been used to identify traits related to drought tolerance (Cheruiyot et al 2018), select superior genotypes for nutritional value (Moreira et al 2018), and identify promising vigor tests for physiological quality in seed lots (Silva et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Using additive indices and principal components to select sexual genitors and hybrids of Urochloa decumbens

Matias

Valle

Gouveia

et al. 2020

Crop Breed. Appl. Biotechnol.

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The selection of sexual genitors in Urochloa decumbens breeding is dependent upon the performance of their progeny for several traits simultaneously. Thus, our objectives were to (i) compare the efficiency of indices to select genitors of U. decumbens, (ii) evaluate the genetic gains obtained through selection intensities, and (iii) evaluate the multivariate pattern of progenies through principal components analysis (PCA). For this purpose, 1415 hybrids from 75 progenies of full siblings were evaluated at Embrapa Beef Cattle (Brazil) using seven cuts for dry matter production, regrowth, protein, fiber, lignin, and percentage digestibility. Statistical analyses were performed using mixed models and PCA. The direct selection for dry matter production provided a 37.51% genetic gain. Agronomic traits using indices provided greater gains. Genitors selected using PCA Biplot were similar to selections using indices. Indices and PCA were proven to be an excellent tool to select multi-traits in U. decumbens.

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Multivariate analysis and vigor tests to determine the quality of Brachiaria decumbens seeds

Cited by 4 publications

References 0 publications

Cold test on the vigor determination of Carthamus tinctorius L. seeds

Cold test on the vigor determination of Carthamus tinctorius L. seeds

Envelope method for the germination test of Mombasa grass

Using additive indices and principal components to select sexual genitors and hybrids of Urochloa decumbens

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