Multi-trait multi-environment diallel analyses for maize breeding

Coelho, Igor Ferreira; Alves, Rodrigo Silva; Rocha, João Romero do Amaral Santos de Carvalho; Peixoto, Marco Antônio; Teodoro, Larissa Pereira Ribeiro; Teodoro, Paulo Eduardo; Pinto, Jefferson Fernando Naves; Reis, Edésio Fialho dos

doi:10.1007/s10681-020-02677-9

Cited by 13 publications

(11 citation statements)

References 36 publications

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“…In maize breeding, diallel analyses are one of the most common methods for generating genetic information that can be used to develop breeding strategies (Nardino et al 2020, Onofri et al 2021. It is possible to make inferences about the genetic control of the traits of interest from the information provided by the diallels, evaluate the heterotic potential and genetic values of the parents by their combining abilities, and predict the best crosses between the parents (Hallauer et al 2010, Coelho et al 2020.…”

Section: Introductionmentioning

confidence: 99%

Selection of maize lines and prediction of hybrid and synthetic means using intergroup topcrosses

Costa

Cascão

Santana

et al. 2022

Crop Breed. Appl. Biotechnol.

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Topcrosses are routinely used in maize-hybrid programs. This study aimed to evaluate heterosis components and combining ability to predict hybrid means between synthetics from two groups of S 1 maize lines using the intergroup topcrosses model that includes S 2 lines. Two groups, each with 30 S 1 maize lines, were crossed using an intergroup topcross system, with a mixture of lines from one group as a tester for the contrasting group. Simultaneously, 30 S 2 lines from each group were generated via self-pollination. Lines and topcrosses were experimentally evaluated and the data were analyzed using a model adapted to the study design. The results showed the suitability of the proposed model for studying heterosis components and general combining ability, detailing additive and dominance effects. Prediction of hybrid means between synthetics showed the potential of the lines to generate base populations for an interpopulation breeding program.

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Section: Introductionmentioning

confidence: 99%

Selection of maize lines and prediction of hybrid and synthetic means using intergroup topcrosses

Costa

Cascão

Santana

et al. 2022

Crop Breed. Appl. Biotechnol.

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“…Diallel mating designs are used for progeny tests [ 5 ] and are widely adopted in plant breeding [ 6 – 9 ]. These mating designs allow the evaluation of general and specific combining abilities, which are additive genetic effects based on general combining ability (GCA), and dominance genetic effect based on specific combining ability (SCA) [ 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Accounting for spatial trends in multi-environment diallel analysis in maize breeding

et al. 2021

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Spatial trends represent an obstacle to genetic evaluation in maize breeding. Spatial analyses can correct spatial trends, which allow for an increase in selective accuracy. The objective of this study was to compare the spatial (SPA) and non-spatial (NSPA) models in diallel multi-environment trial analyses in maize breeding. The trials consisted of 78 inter-populational maize hybrids, tested in four environments (E1, E2, E3, and E4), with three replications, under a randomized complete block design. The SPA models accounted for autocorrelation among rows and columns by the inclusion of first-order autoregressive matrices (AR1 ⊗ AR1). Then, the rows and columns factors were included in the fixed and random parts of the model. Based on the Bayesian information criteria, the SPA models were used to analyze trials E3 and E4, while the NSPA model was used for analyzing trials E1 and E2. In the joint analysis, the compound symmetry structure for the genotypic effects presented the best fit. The likelihood ratio test showed that some effects changed regarding significance when the SPA and NSPA models were used. In addition, the heritability, selective accuracy, and selection gain were higher when the SPA models were used. This indicates the power of the SPA model in dealing with spatial trends. The SPA model exhibits higher reliability values and is recommended to be incorporated in the standard procedure of genetic evaluation in maize breeding. The analyses bring the parents 2, 10 and 12, as potential parents in this microregion.

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“…Thus, testing the combining ability in different environments will enrich insights for inbred selection based on SCA, which will allow the true SCA potential of the inbred to be properly recognized. The process of finding out the genetic effects of a line does not require testing in all environmental conditions, but can be done through testing of planting with different time gaps or planting in places with different elevations (Coelho et al, 2020;Murtadha, Ariyo, & Alghamdi, 2018).…”

Section: Introductionmentioning

confidence: 99%

Combining Ability of Indonesian Tropical Maize in Two Different Seasons

2021

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Testing an inbred cross for hybrid development requires a proper test cross method. The diallel is one crossing method to find out the magnitude of inbred combining ability, both general general (GCA) and specific combining ability (SCA) and specific combining ability, that is useful in hybrid development. The objective of the study is to determine the GCA, SCA and heterosis of 6 inbred lines in two seasons. All the inbreds were crossed in diallel design and further evaluated for their combining ability and genetic ratio following the respective methods of Griffing and Baker. The results revealed that GCA, SCA and Reciprocal (REC.) were influenced by planting seasons for almost all yield and yield-related traits. Non-additive gene action was more important in controlling ear length, ear row number, shelled ear weight and yield. The best GCA for yield trait was detected on inbreds G2 and G5. The conclusion from the interpretation of both SCA and REC. is that the inbred crosses of G1 x G6, G2 x G5, G4 x G6, and G5 x G6 have the best yields followed by high heterosis values.

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Multi-trait multi-environment diallel analyses for maize breeding

Cited by 13 publications

References 36 publications

Selection of maize lines and prediction of hybrid and synthetic means using intergroup topcrosses

Selection of maize lines and prediction of hybrid and synthetic means using intergroup topcrosses

Accounting for spatial trends in multi-environment diallel analysis in maize breeding

Combining Ability of Indonesian Tropical Maize in Two Different Seasons

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