&lt;b&gt;Diallel analysis of maize hybrids for agronomic and bromatological forage traits

Mendes, Matheus Henrique Silveira; Pereira, Cristiane Aparecida; Souza, João Cândido de

doi:10.4025/actasciagron.v37i2.19329

Cited by 8 publications

(14 citation statements)

References 11 publications

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“…This indicates that additive and non-additive genes control the traits related to silage production and its bromatological characteristics. These data corroborate the results from other studies (Ertiro et al, 2013;Guerrero et al, 2014;Mendes et al, 2015).…”

Section: Individual and Join Analyses Of Variance And Heritabilitysupporting

confidence: 93%

“…Many studies have indicated interactions between corn genotypes and the environment for several important traits such as grain yield and bromatological quality of silage (Gralak et al, 2014;de Souza Neto et al, 2015;Marcondes et al, 2015;Mendes et al, 2015;Marcondes et al, 2016).…”

Section: Individual and Join Analyses Of Variance And Heritabilitymentioning

confidence: 99%

“…These hybrids are important sources of genetic variability for the base population of corn genetic breeding programs, even when the major aim is to produce silage (Mendes et al, 2015). However, the selection of the best hybrids must be supported by genetic parameters such as genetic divergence among genitors, combining ability, and favorable allele frequency (Mendes et al, 2015, de Souza Neto et al, 2015.…”

Section: Introductionmentioning

confidence: 99%

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Genetic divergence among corn hybrids and combining ability for agronomic and bromatological traits of silage

et al. 2017

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ABSTRACT.We assessed the impact of genetic divergence and the ability to combine corn hybrids used for the production of silage on the agronomic and bromatological traits of silage quality. We evaluated 18 corn hybrids used as genitors in a circulant diallel scheme in which each genitor hybrid participated in 9 hybrid combinations, and evaluated 100 treatments [18 genitor hybrids, 81 diallelic hybrids, and a commercial check hybrid (DKB330)] in a triple lattice 10 x 10 experimental design in two environments in Brazil. Genetic variability 2 E. Gralak et al.Genetics and Molecular Research 16 (2): gmr16029643 was adequate among the corn silage hybrids, and we can recommend the use of genitors 2B688 and P30B39 for the formation of a base population for intrapopulational breeding. The P30P34 hybrid is the best for intrapopulational breeding when aiming for silage with high protein content, low fiber content, and higher in vitro digestibility. Interpopulational breeding directed at improving silage digestibility can use a combination of genitors P30P34 and AS1572, but AS1572 and P30K64 are the most recommended. Hybrids 2B688, P30P34, and SG6015 are considered the most genetically distant of the others hybrids, and have desirable combining potential; therefore, they are important genitors for the formation of new segregated populations for improving corn silage.

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Section: Individual and Join Analyses Of Variance And Heritabilitysupporting

confidence: 93%

Section: Individual and Join Analyses Of Variance And Heritabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Genetic divergence among corn hybrids and combining ability for agronomic and bromatological traits of silage

et al. 2017

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“…This interspecific tetraploid population presented higher additive variability than that observed in a population of diploid U. ruziziensis (Simeão et al, 2016c), or Panicum virgatum L. (Bhandari et al, 2010) or Panicum maximum (Resende et al, 2004). Most of the traits evaluated presented more addictive effect, so the selection and use of parents with higher GCA are reasonable (Mendes et al, 2015). It must be considered, however, that there was no statistically significant variability between sexual and apomictic parents for several traits (Table 2).…”

Section: Diallel Analysis and Selection Methodsmentioning

confidence: 79%

Contribution of Additive and Dominance Effects on Agronomical and Nutritional Traits, and Multivariate Selection on Urochloa spp. Hybrids

et al. 2018

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A tropical forage breeding program contains several peculiarities, especially when it involves polyploid species and facultative apomixis. Urochloa spp. are excellent perennial forages, and the identification of superior genotypes depends on the selection of many characteristics under complex genetic control, with high cost and time‐consuming evaluation. Therefore, the use of tools such as multivariate analysis and diallel analyses could contribute to improving the efficiency of breeding programs. Thus, the objectives were to estimate (i) the contribution of additive and nonadditive effects on agronomical and nutritional traits in a population of interspecific hybrids of Urochloa spp., originated from a partial diallel between five apomictic and four sexual parents, and (ii) the accuracy of multivariate index selection efficiency. Genetic variability was detected between the parents, crosses, and hybrids for all the traits. There was no clear trend of the importance of the additive and nonadditive genetic effects on agronomical and nutritional traits. Furthermore, the predominant component of genetic variance changed depending on the characteristic. Moreover, there was no parent or cross that was outstanding for all traits simultaneously, showing the high variability generated from these crosses. The Mulamba and Mock index associated with principal components analysis allowed a more significant gain only for agronomic characteristics. However, the per se index, at the univariate level, promoted a more balanced response to selection for all traits.

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“…Maternal effects indicate that the traits had mitochondrial mode of inheritance pattern implying that when selecting parents for hybridization in soybean for bruchid resistance breeders should give female parent priority (Cai et al, 2012). The significant difference between reciprocal crosses indicated that non-chromosomal maternal effects could have contributed to a heterotic response (Mendes et al, 2015), and presence of the interaction of the genes with nuclear factors or the expression of extranuclear genes (Cai et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Genetics of Resistance in F2 Soybean Populations for Adzuki Bean Bruchid (Callosobruchus chinensis)

Msiska¹,

Hailay²,

Miesho³

et al. 2018

JAS

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Adzuki bean bruchid (Callosobruchus chinensis) is a significant pest of soybean in Uganda. To sustainably manage this pest, utilization of resistant soybean varieties is the key solution. Development of resistant varieties needs knowledge on modes of inheritance which is crucial in selection of parent materials. To identify parents, a study was initiated to determine the gene action and mode of inheritance of resistance to bruchids in soybean. Nine parental lines were crossed in a full-diallel at Makerere University Agricultural Institute, Uganda. The generated F1s were advanced to F2 and seeds were evaluated for response to bruchid infestation in a randomised complete block design. Ten seeds were infested with 10 randomly selected unsexed 1-3 day old bruchids. Genotypes showed significant differences in seed weight loss (swl), adult bruchid emergence (ABE) and Dobie susceptibility index (DSI) indicating that these parameters could be used to screen genotypes in genetic analysis. Mean squares of general combining ability (GCA) were significant (P < 0.05) for swl, DSI and number of ABE from the F2 seeds indicating additive gene action. Susceptibility parameters ABE and DSI showed significant specific combining ability (SCA) indicating non-additive gene action. Resistance was influenced by maternal effects indicating that direction of the cross was important. Genotypes S-Line 9.2 and S-Line 13.2A showed negative significant GCA effects for at least two of the susceptibility parameters indicating that they were the best parents for bruchid resistance breeding. The study established that additive, non additive and maternal effects governed the gene expression in soybean resistance to bruchids.

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<b>Diallel analysis of maize hybrids for agronomic and bromatological forage traits

Cited by 8 publications

References 11 publications

Genetic divergence among corn hybrids and combining ability for agronomic and bromatological traits of silage

Genetic divergence among corn hybrids and combining ability for agronomic and bromatological traits of silage

Contribution of Additive and Dominance Effects on Agronomical and Nutritional Traits, and Multivariate Selection on Urochloa spp. Hybrids

Genetics of Resistance in F2 Soybean Populations for Adzuki Bean Bruchid (Callosobruchus chinensis)

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