Divergência genética e heterose relacionada à qualidade fisiológica em sementes de milho

Prazeres, Camila Segalla; Coelho, Cileide Maria Medeiros

doi:10.1590/1678-4499.368

Cited by 5 publications

(5 citation statements)

References 14 publications

(10 reference statements)

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“…Seeds when taken to the field are subject to adverse environmental conditions, making it essential to use seeds with high physiological quality, which is directly related to the potential of germination and vigour and affected by the genotype (Oliveira et al, 2013;Nerling et al, 2013;Prazeres et al, 2016a). When seeds of different genotypes are submitted to ideal conditions of temperature and humidity, the germination potential can be expressed, with the normal seedlings formation.…”

Section: Introductionmentioning

confidence: 99%

“…Researches on maize in recent years are usually specific for the relationship between physiological quality and the factors that affect it such as storage components (Nerling et al, 2018;Abreu et al, 2016;Coelho, 2016a), enzymes (Oliveira et al, 2015;Santos et al, 2016;Silva-Neta et al, 2015;Lopes et al, 2017;Diniz et al, 2018), heterosis (Nerling et al, 2013;Oliveira et al, 2015;Coelho, 2016a;Coelho, 2016b;Abreu et al, 2018) and image analysis (Pinto et al, 2015;Dias et al, 2015;Castan et al, 2018;Medeiros et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Seed reserves reduction rate and reserves mobilization to the seedling explain the vigour of maize seeds

2019

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Understanding how the seed reserve dynamics occurs during germination and seedling formation is determinant for advancements on seed technology. The aims of this study were: to verify which accelerated ageing temperature is the most effective to separate the vigour levels of maize seeds and to evaluate the reserves dynamics during germination and seedling formation process. Seven maize cultivars were submitted to the germination rate, accelerated ageing, thousand seed weight, total seedling length, shoot and root length, dry matter of seed and seedling, remaining dry matter in the endosperm, seed reserves reduction rate, conversion efficiency of reserves, reserves mobilization rate to the seedling and energy expenditure using the completely randomized statistical design. The reserves dynamics and seedling formation depends on the genotype and the initial seed vigour. Accelerated ageing at 45 °C for 72 hours is the most efficient combination to segregate vigour levels. Genotypes with higher seed reserve utilisation efficiency have higher vigour, producing seedlings with higher dry matter, higher total, shoot and root length, regardless of seed weight. The two rates evaluated prompt us to conclude that they explain the maize seed vigour and can be used in quality control programs to select high physiological quality cultivars.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Seed reserves reduction rate and reserves mobilization to the seedling explain the vigour of maize seeds

2019

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“…The region has a predominantly tropical climate according to Koppen the Aw, with rains in summer and with a distinctly dry season in winter, and the precipitation and temperature data obtained over the conduction period of the experiment are shown in Figure 2. Fonte: Climatempo [20].…”

Section: Methodsmentioning

confidence: 99%

Analysis of genetic divergence through agronomic characters in green corn cultivars

Coutas¹,

Santos²,

Ribeiro³

et al. 2021

IJAERS

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The genetic divergence in maize populations is important, as it allows us to identify among the existing genotypes, the best ones to be used as parents in future breeding programs as a strategy for obtaining greater gains. Therefore, the objective of this work was to estimate the genetic divergences in green corn cultivars. The tests were conducted in the 2019/20 harvest on a property in the state of Pará. The design used in the given experiment was randomized blocks (DBC) and 3 replicates. The experimental plot consisted of 4 rows of 5.0 m spaced at 0.9 m between rows, the two central rows being considered the useful area. The genetic divergence was evaluated by multivariate procedures such as the generalized Mahalanobis distance and by Tocher optimization grouping methods and Singh criterion to quantify the relative contribution of the seven characteristics. The characteristics average mass of grains per ear and number of grains in the row of the ear were the ones that most contributed to genetic divergence. The dual hybrids BR205 and BRS3046 and the triple hybrid AG8088 are potentially promising for use in future breeding programs.The sweet corn harvest is carried out when the grains are still high in moisture (greater than 70%), which highlights the interference of the physiological stage of grain maturity in the yield. Therefore, the most propitious time for harvesting is the period in which the grains reach Débora Thaís da Silva Coutas et al.

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“…Highlight for the hybrid DKB310 in variable YI ( Figure 5A). Studies in the literature report the canonical explanation rates for corn as Varella et al (2019) who obtained an explanation of 85% of the total variance in the sum of the two canonical axes, as well as Prazeres and Coelho (2016) with a sum of 83%. For the GMS, the hybrid CD3770 had influence on the variables LAI, NGR, PH, EIH, NGE and YI ( Figure 5B).…”

Section: B Amentioning

confidence: 99%

MULTIVARIATE AND CANONICAL MODELS APPLIED TO CORN: BENEFITS OF GREEN MANURE WITH Vigna unguiculate

Ferreira¹,

Dalbosco²,

Carvalho

et al. 2020

HOLOS

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Divergência genética e heterose relacionada à qualidade fisiológica em sementes de milho

Cited by 5 publications

References 14 publications

Seed reserves reduction rate and reserves mobilization to the seedling explain the vigour of maize seeds

Seed reserves reduction rate and reserves mobilization to the seedling explain the vigour of maize seeds

Analysis of genetic divergence through agronomic characters in green corn cultivars

MULTIVARIATE AND CANONICAL MODELS APPLIED TO CORN: BENEFITS OF GREEN MANURE WITH Vigna unguiculate

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