Genetic progress of phenotypic recurrent selection in popcorn

Ematné, Hugo Junqueira; Souza, João Cândido de; Biudes, Gustavo Barnabé; Nunes, José Aírton Rodrigues; Guedes, Fernando Lisboa

doi:10.1590/s1413-70542012000100003

Cited by 4 publications

(4 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Overall, it may be observed that the present results are consistent with those reported by Hallauer et al (2010), who noted that for some traits in corn, performance of three recurrent selection cycles is not sufficient to obtain expressive gains. In the present study, differences among the selection cycles for EV were significantly expressed from the second cycle, which corroborates the findings of Hallauer et al (2010) and Ematné et al (2012), who detected small but significant differences from the second selection cycle.…”

Section: Resultssupporting

confidence: 93%

See 1 more Smart Citation

Estimate of genetic gain in popcorn after cycles of phenotypic recurrent selection

et al. 2016

View full text Add to dashboard Cite

ABSTRACT. Popcorn is widely consumed in Brazil, yet there are few breeding programs for this crop. Recurrent selection (RS) is a viable breeding alternative for popcorn; however, the gains achieved must be frequently checked. The aim of this study was to assess the effect of selection for grain type (round and pointed) after four cycles of phenotypic RS on the main agronomic traits of popcorn, to estimate the genetic gain achieved for the trait of expansion volume (EV), and to obtain estimates of phenotypic correlations for the main traits of the crop in the UFLA E and UFLA R populations. The zero, one, two, and three cycles of the UFLA E and UFLA R populations, the fourth cycle, and the controls IAC-112 and IAC-125 were used. The experiments were conducted at the experimental farm of Universidade Federal de Lavras (UFLA; Environment 1) and at the experimental area of the Genetics and Plant Breeding Sector of the Department of Biology at UFLA (Environment 2) in the 2010/11 crop season. Nine agronomic traits were evaluated, including EV and grain yield (GY). The UFLA R and UFLA E populations showed similar behavior for all evaluated traits. The type of grain did not affect the genetic gain for EV, which was 5 and 3.7% in each cycle carried out in the UFLA E and UFLA R population, respectively. Phenotypic selection carried out during recombination for EV is an effective method for increasing expression of the trait. EV and GY did not show a linear association.

show abstract

Section: Resultssupporting

confidence: 93%

“…The populations UFLA-E 1, UFLA-E 2, UFLA-R 1, and UFLA-R 2 were obtained as described by Ematné et al (2012), and the populations UFLA-E 0 and UFLA-R 0 were derived from the first selection for grain type (rounded or pointed) of the original UFLA population (Ematné et al, 2012).…”

Section: Methodsmentioning

confidence: 99%

Estimate of genetic gain in popcorn after cycles of phenotypic recurrent selection

et al. 2016

View full text Add to dashboard Cite

show abstract

“…However, the growing demand is not being met because of the frequent unavailability of the cultivars registered with the Brazilian Ministry of Agricultural, Livestock, and Food Supply (Ministério da Agricultura, Pecuária e Abastecimento Agrário). Especially, the inability of the public research institutions working on this plant to supply the required number of cultivars is a big obstacle for the expansion of popcorn cultivation (Seifert et al, 2006;Ematné et al, 2012). In this regard, the development of hybrid cultivars deserves special attention from popcorn breeders.…”

Section: Introductionmentioning

confidence: 99%

Combining ability of S<sub>3</sub> progenies for key agronomic traits in popcorn: comparison of testers in top-crosses

et al. 2016

View full text Add to dashboard Cite

The successful development of hybrid cultivars depends on the reliability of estimated combining ability of the parent lines. The objectives of this study were to assess the combining ability of partially inbred S families of popcorn derived from the open-pollinated variety UENF 14, via top-crosses with four testers, and to compare the testers for their ability to discriminate the S progenies. The experiment was conducted in the 2015/2016 crop season, in an incomplete-block (Lattice) design with three replications. The following agronomic traits were evaluated: average plant height, grain yield (GY), popping expansion (PE), and expanded popcorn volume per hectare. The top-cross hybrid, originating from the BRS-Angela vs S progeny 10 combination, was indicated as promising, showing high values for specific combining ability for GY and PE. For the S progenies that showed high and positive GCA values for GY and PE, the continuity of the breeding program is recommended, with the advance of self-pollination generations. Fasoulas' differentiation index discriminated the BRS-Angela tester as the most suitable for identifying the superior progenies.

show abstract

“…The methodology of recurrent selection is the main alternative, consisting of a cyclical process that increases the frequency of favourable alleles, raising the mean of the main traits without exhausting the genetic variability of the population (HALLAUER; MIRANDA FILHO; CARENA, 2010), although it is believed that the gains are no longer significantly increased in the more advanced cycles. The methodology of recurrent selection has already been used in some studies on popcorn (EMATNÉ et al, 2012;FARIA et al, 2008;GUIMARÃES et al, 2018a;LIMA et al, 2018;REIS et al, 2009;VILARINHO et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Genetic Gains in the Popcorn Population Uenf-14: Developing the Ninth Generation of Intrapopulation Recurrent Selection

et al. 2019

View full text Add to dashboard Cite

The occurrence of negative correlations between grain yield (GY) and popping expansion (PE) in popcorn complicates the selection process. In an attempt to overcome this inconvenience, we proposed the use of the importance characteristic volume per popcorn per hectare (PV). The objectives of this study were to develop the ninth cycle of the UENF-14 popcorn population, to estimate the direct and indirect effects of PV and to verify the genetic progress among all selective cycles. We obtained and evaluated 200 inbred progenies in randomised blocks arranged in replicates within sets, with nine sets consisting of 25 progenies and one set with all previous eight cycles with three replicates. The average height of the plants, prolificacy, 100-grain weight, grain yield, grain popping expansion and volume per popcorn per hectare were evaluated. Track analysis was performed to determine the direct and indirect effects, and the Mulamba and Mock selection index was calculated for the selection of the 40 superior progenies. There was genetic variability among progenies in all evaluated traits, with a cause-and-effect relationship between PV with GY and PE, allowing simultaneous gains with indirect selection. The selection of the best progenies was more effective when using arbitrarily assigned weights, which provided higher predicted gains for PV (20.73%). The means obtained in all cycles indicated increases, demonstrating the efficiency of using continuous recurrent selection in popcorn breeding programs.

show abstract

Genetic progress of phenotypic recurrent selection in popcorn

Cited by 4 publications

References 13 publications

Estimate of genetic gain in popcorn after cycles of phenotypic recurrent selection

Estimate of genetic gain in popcorn after cycles of phenotypic recurrent selection

Combining ability of S<sub>3</sub> progenies for key agronomic traits in popcorn: comparison of testers in top-crosses

Genetic Gains in the Popcorn Population Uenf-14: Developing the Ninth Generation of Intrapopulation Recurrent Selection

Contact Info

Product

Resources

About