&lt;b&gt;Response to the selection in the 11&lt;sup&gt;th&lt;/sup&gt; cycle of reciprocal recurrent selection among full-sib families of maize&lt;/b&gt; - doi: 10.4025/actasciagron.v35i4.17489

Berilli, Ana Paula Cândido Gabriel; Pereira, Messias Gonzaga; Trindade, R. dos S.; Costa, Fabiane Rabelo da; Cunha, Keila Silva da

doi:10.4025/actasciagron.v35i4.17489

Cited by 25 publications

(30 citation statements)

References 24 publications

(6 reference statements)

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“…In the literature, there are reports of gain achieved with long term RRS with various selection cycles. In these cases, the average gain ranged from 7 to 13% per cycle (Santos et al, 2007;Hallauer and Carena, 2012;Berilli et al, 2013), which is lower than the values reported in the present study.…”

Section: Resultscontrasting

confidence: 55%

Evaluation of progenies from the fifth reciprocal recurrent selection cycle in maize

Alves¹,

Pádua²,

Dias³

et al. 2015

Genet. Mol. Res.

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ABSTRACT. The objective of this study was to evaluate the performance of 119 full sib progenies of the fifth cycle of reciprocal recurrent selection (RRS) derived from of Universidade Federal de Lavras maize breeding program. The experiment was carried out in an 11 x 11 triple lattice design at two locations (Lavras, Lambari). The plots consisted of two rows of 3 m, with four plants per 1 m and 0.60 meters of spacing between lines. The grain yield was obtained as kg/plot through weighing of husked ears. The contrast between progenies and controls was not significant, indicating there were no significant differences among the average grain yields of the progenies and controls. When considering the joint analysis, heritability was 64.2%; however, this estimate did not differ from the values estimated for each location separately. Estimates of genetic and phenotypic variance among progenies ranged from 0.21 to 0.28 and 0.30 to 0.47, respectively. Estimates of selection gain, for 10% selection intensity, indicated gains of 16% in the joint analysis of the two locations. The progenies of the fifth cycle of RRS had high average grain yield, associated with high variability. In comparison to the average grain yields exhibited by the controls, it was concluded that the progenies have the potential to be commercially exploited.

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Section: Resultscontrasting

confidence: 55%

Evaluation of progenies from the fifth reciprocal recurrent selection cycle in maize

Alves¹,

Pádua²,

Dias³

et al. 2015

Genet. Mol. Res.

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“…The oscillations in gains between cycles and the coefficient of determination of only 11 % explain the absence of detected total gain in DF (Figure 2). The use of alternative selection criteria, such as the selection index, might have contributed to simultaneous gains in the different traits (Smith et al, 1981;Berilli et al, 2013).…”

Section: Resultsmentioning

confidence: 99%

Genetic progress after cycles of upland rice recurrent selection

Júnior

Melo

Morais

et al. 2015

Sci. agric. (Piracicaba, Braz.)

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Periodic assessment of the genetic progress made in recurrent selection programs is essential for assessing the evolution of the programs and identifying the main factors that have contributed to this progress. This study aimed to estimate genetic progress in grain yield, plant height and days-to-flowering achieved in the CNA6 population of upland rice (Oryza sativa L.), after four cycles of recurrent selection; and evaluate the genetic potential of this population to generate superior inbred lines after each selection cycle. The experimental data were obtained from progeny yield trials of each recurrent selection cycle. These trials were carried out in two or three locations per cycle, and consisted of S 0:2 progenies and at least three checks. Federer's augmented block design, with one replication on location (the environment), was adopted.Results revealed genetic progress for grain yield and plant height, with total genetic gains of 375.87 kg ha −1 and -3.90 cm, respectively, during the four selection cycles. The annual relative gain observed for grain yield was 1.54 %. The genetic potential of the population was analysed by the expected proportion of superior inbred lines. The standard adopted as the limit for obtaining superior inbred lines was the average of the checks for each trait. The genetic potential for grain yield and plant height increased during the study period. For days-to-flowering, no genetic gain occurred; however, the genetic potential of the population to generate superior inbred lines for this trait was maintained after the selection cycles.

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“…These coefficients of variation demonstrate acceptable experimental accuracy for all traits. Berilli et al (2013) obtained coefficient of experimental variation and heritability of 20% and 56%, respectively, for yield in the 11th reciprocal recurrent selection cycle among corn full-sib families. Faria et al (2008) evaluated the effectiveness of reciprocal recurrent selection in popcorn hybrids, and obtained coefficient of experimental variation (CV e ) and heritability (h 2 ) of 20.90% and 50.37% for yield, respectively.…”

Section: Analysis Of Variance and Genetic Parametersmentioning

confidence: 99%

Prediction of genetic gains and correlations in corn hybrids for silage

Crevelari¹,

Durães²,

Bendia³

et al. 2017

Aust J Crop Sci

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During the dry season the production of pastures dicreases. Usually, it makes the situation necessary to use corn silage as fibrous fodder source. The aim of this study was to develop corn hybrids for silage production, prioritizing hybrid combinations of the heterotic group 'DENT' to better understand the association between the evaluated traits and to optimize the selection process by using selection indices. Nineteen topcross hybrids and five controls were evaluated in a complete randomized block design with four and five replications in the agricultural years of 2013 and 2014. The following traits were evaluated: plant height, first ear height, stem diameter, yield at silage stage, ear yield with and without straw at silage stage, fresh mass yield, and proportion of grains in the fresh mass. The highest coefficients of correlation were obtained between yield and ear yield with straw (r = 0.94**), and between ear yield with straw and fresh mass yield (r = 0.89**). The Mulamba & Mock selection index was used for prediction of genetic gains. For selection of the superior hybrids, the index resulted in higher estimates of predicted gains for yield at silage stage and fresh mass yield, with values of 6.13 and 4.46%, respectively, using weights assigned. The use of selection indices allows simultaneous prediction of gains in the two main traits. Topcross hybrids presented high potential for silage yield in the North and Northwest Regions.

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<b>Response to the selection in the 11<sup>th</sup> cycle of reciprocal recurrent selection among full-sib families of maize</b> - doi: 10.4025/actasciagron.v35i4.17489

Cited by 25 publications

References 24 publications

Evaluation of progenies from the fifth reciprocal recurrent selection cycle in maize

Evaluation of progenies from the fifth reciprocal recurrent selection cycle in maize

Genetic progress after cycles of upland rice recurrent selection

Prediction of genetic gains and correlations in corn hybrids for silage

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