Inbreeding depression and performance of partially self-fertilized maize progenies in a top cross

Somera, Andreia; Ragagnin, Angelita Lorrayne Soares Lima; Costa, Maraiza Lima; Candido, Willame dos Santos; Reis, Edésio Fialho dos

doi:10.4067/s0718-58392018000300318

Cited by 4 publications

(5 citation statements)

References 18 publications

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“…The inbreeding depression (ID%) for the grain yield trait was, on an average, 30.89%, and it ranged from 17.42 to 46.09% for the hybrids AG1051 and RK3014, respectively (Table 7). Other results corroborate with the values obtained in this work (Oliveira et al, 2020;Somera et al, 2018).…”

Section: Resultssupporting

confidence: 93%

“…When considering the contribution of the estimates for plant height, it is observed on an average, as a higher contribution of m+a (80.43%) in relation to d (19.57%) (Table 8). Similar results were reported by several authors demonstrating that this characteristic has a greater influence of additive effects than others (Oliveira et al, 2020;Somera et al, 2018;Viana et al, 2009).…”

Section: Resultssupporting

confidence: 92%

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Mean components for choosing maize populations to extract inbred lines

et al. 2020

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The choice of germplasm is one of the most important phases of a genetic improvement program to the fact that it is the initial development stage of superior hybrids. Hence, the objectives of this study were to obtain the estimates of m+a and d, and inbreeding depression for grain yield and plant height traits, for cultivars lacking this information, and thus to predict the potential of maize hybrids for the extraction of lines. The F1 and F2 generations of 12 maize hybrids were tested at two sites, during the crop years of 2017-18 and 2018-19, accounting for four environments. Both the generations were evaluated in contiguous experiments in randomized blocks design with three and two repetitions during the years 2017-18 and 2018-19, respectively. The data on plant height and grain yield were collected, per plot, from both the generations, utilizing which, the m+a and d mean components were estimated. The effects of dominance had greater importance for the character grain yield. The most promising hybrids for extraction of lines were AG1051, AG8025, BG7046, DKB455, and OMEGA due to their greater estimates of m+a. The hybrids AG8025 and BG7046 were associated with high values of m+a and grain yield. For the plant height trait, there was a greater contribution of additive effects. Therefore, greater inbreeding depression was observed for the grain yield trait when compared to the height of the plant.

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Section: Resultssupporting

confidence: 93%

Section: Resultssupporting

confidence: 92%

Mean components for choosing maize populations to extract inbred lines

et al. 2020

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“…Results in Table 4a and b reflecting that dominance plays greater role in inheritance of most studied traits, so selection for improvement these traits could be effective in late generations. Additive x additive gene effect was more effective than dominance x dominance and additive x dominance reflecting the important of this type of gene action, similar results were obtained by Mansour [22], Andreia et al [24] and Attiq et al [21]. Bojan et al [28] reported that, dominant was more important than additive component.…”

Section: Discussionsupporting

confidence: 72%

Estimation of Inheritance Leaf Rust, Powdery Mildew, Yield and Yield Components in Barley through Generation Means Analysis

Mansour

El-Shawy

Abdel-Azim

et al. 2023

AJRCS

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The success of breeding program for improvement any crop depends mainly on the available background of the inheritance of the studied traits to be selected. This study was carried out during 2018/2019, 2019/2020 and 2020/2021 grown seasons at the experimental farm of Sakha Agricultural Research Station, Agricultural Research Center, Egypt to estimate the effect of genetic parameters controlling yield and yield component traits in addition severity of leaf rust and powdery mildew disease infection. Six generations (P1, P2, F1, F2, BC1 and BC2) model was used. Results indicated that, mean effect (m) was highly significant in all evaluated crosses for all studied traits. The relative importance of additive and dominance effects differed from trait to another in each cross. For epistatic components, dominance × dominance interaction effects were more effective than other components in most studied traits. Significant or/and highly significant values in desirable direction of heterosis compared to mid and better parent were obtained from most studied crosses in yield and its attribute traits, but it found over mid parents only for cross no.1 in leaf rust and crosses no. 1 and 2 in powdery mildew infection. The estimation of broad-sense heritability showed high values for studied traits and crosses, while narrow-sense heritability and genetic advance from selection ranged from low to medium in most crosses for the agronomic traits, while it ranged from low to high for leaf rust and powdery mildew infection. Finally, the results of this study recommended the barley crosses no. 4 for improve yield potential and resistant to leaf rust and cross no. 5 to improve resistance to powdery mildew, where it had high genetic advance associated with high heritability.

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“…Little information is available on obtaining cultivars for green maize production, and there are few genetic studies on the traits involved in this production (Kuki et al, 2017;Somera et al, 2018). Most studies are evaluation of the performance of existing cultivars (Cardoso et al, 2004;Lima et al, 2019;Couto et al, 2017;Rodrigues et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Inbreeding depression and genetic variability of populations for green maize production

Cascão¹,

Santana

Costa

et al. 2022

Rev. Ceres

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The production of green maize is considerable important for various regions of Brazil. It is vital that breeding programs of public institutions seek to meet the needs of this market sector, which has a relevant social role, mainly on small properties. The aim of this study was to estimate the inbreeding depression and the genetic components (m + a and d) of characters associated with green maize production and quality in three populations of different genetic basis: the variety UFG-Samambaia (P1), and two populations formed by crossing the commercial hybrids (P2 e P3). The S 1 progenies of each population, the three S 0 populations, and two checks were evaluated in a 14 × 14 triple lattice design. Agronomic and ear quality traits were evaluated. Genetic variability and greater inbreeding depression were observed for most of the traits among the P1 progenies. In P2 and P3, greater inbreeding depression was observed for male flowering, ear weight without straw, ear diameter, ear weight, female flowering, breakage and lodging, and grain color. The traits of ear quality, important for green maize production, had greater inbreeding depression than the agronomic traits, indicating that inbreeding depression and exploitation of heterosis should be considered in the selection process for these traits.

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Inbreeding depression and performance of partially self-fertilized maize progenies in a top cross

Cited by 4 publications

References 18 publications

Mean components for choosing maize populations to extract inbred lines

Mean components for choosing maize populations to extract inbred lines

Estimation of Inheritance Leaf Rust, Powdery Mildew, Yield and Yield Components in Barley through Generation Means Analysis

Inbreeding depression and genetic variability of populations for green maize production

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