Revisiting Plant Heterosis—From Field Scale to Molecules

Rehman, Attiq Ur; Dang, Trang; Qamar, Shanzay; Ilyas, Amina; Fatema, Reemana; Kafle, Madan; Hussain, Zawar; Masood, Sara; Iqbal, Shehryar; Shahzad, Khurram

doi:10.3390/genes12111688

Cited by 23 publications

(16 citation statements)

References 90 publications

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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%

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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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Section: Discussionsupporting

confidence: 72%

“…The increase in biomass, fertility, stature and other characters that led to desirable performance of the F 1 progeny compared to parents refers to heterosis [21]. For variety evolution as well, selection of better combination heterosis role cannot be ignored.…”

Section: Discussionmentioning

confidence: 99%

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 illustration shows closely related pairs of sister taxa in which one is predominantly self-pollinating (taxa name in green) and the other is cross-pollinating (taxa name in blue). The predominantly self-pollinating species, namely, Arabidopsis ( Klosinska et al, 2016 ), Gossypium ( Rehman et al, 2021 ), Hordeum ( Guo et al, 2018 ), and Triticum ( Qiu et al, 2017 ) show high epigenetic marks. The phylogenetic background is drawn to show the relative systematic positions.…”

Section: Underpinning Of Epigenetic Adaptive Responses In Natural Pop...mentioning

confidence: 99%

Epigenetic variation: A major player in facilitating plant fitness under changing environmental conditions

Rajpal

Rathore

Mehta

et al. 2022

Front. Cell Dev. Biol.

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Recent research in plant epigenetics has increased our understanding of how epigenetic variability can contribute to adaptive phenotypic plasticity in natural populations. Studies show that environmental changes induce epigenetic switches either independently or in complementation with the genetic variation. Although most of the induced epigenetic variability gets reset between generations and is short-lived, some variation becomes transgenerational and results in heritable phenotypic traits. The short-term epigenetic responses provide the first tier of transient plasticity required for local adaptations while transgenerational epigenetic changes contribute to stress memory and help the plants respond better to recurring or long-term stresses. These transgenerational epigenetic variations translate into an additional tier of diversity which results in stable epialleles. In recent years, studies have been conducted on epigenetic variation in natural populations related to various biological processes, ecological factors, communities, and habitats. With the advent of advanced NGS-based technologies, epigenetic studies targeting plants in diverse environments have increased manifold to enhance our understanding of epigenetic responses to environmental stimuli in facilitating plant fitness. Taking all points together in a frame, the present review is a compilation of present-day knowledge and understanding of the role of epigenetics and its fitness benefits in diverse ecological systems in natural populations.

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“…He further indicated that a combination of various mechanisms produced heterosis in complex traits. Rehman et al (2021) reviewed various studies on heterosis and pointed out that increased knowledge across fields of science, such as genetics, epigenetics, genomics, proteomics, and metabolomics, provided new insights into understanding the expression of hybrid vigor or heterosis.…”

Section: Introductionmentioning

confidence: 99%

Predicting heterosis via genetic distance and the number of SNPs in selected segments of chromosomes in maize

Jiang

Yin

et al. 2023

Front. Plant Sci.

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A reliable method is needed for predicting heterosis to help maize (Zea mays L.) breeders develop new hybrids more efficiently. The objectives of this study were to 1) investigate if the numbers of selected PEUS SNPs (the SNP in the Promoters (1 kb upstream of the start codon), Exons, Untranslated region (UTR), and Stop codons) could be used for predicting MPH or BPH of GY; 2) if the number of PEUS SNPs is a better predictor of MPH and/or BPH of GY than genetic distance (GD). A line × tester experiment was conducted with 19 elite maize inbreds from three heterotic groups, which were crossed with five testers. The multi-location trial data on GY were recorded. Whole-genome resequencing of the 24 inbreds was carried out. After filtration, a total of 58,986,791 SNPs were called with high confidence. Selected SNPs in the promoters, exons, untranslated region (UTRs), and stop codons (PEUS SNPs) were counted, and the GD was calculated. The correlation between heterozygous PEUS SNPs/GD and mean MPH, BPH of GY revealed that 1) both the number of heterozygous PEUS SNP and the GD were highly correlated to both MPH_GY and BPH_GY at p<0.01 with correlation coefficients for the number of heterozygous PEUS SNP being higher than that for GD; 2) the mean number of heterozygous PEUS SNPs was also highly correlated with mean BPH_GY or mean MPH_GY (p<0.05) in the 95 crosses grouped by either male or female parents, implying that inbreds can be selected before making the actual crosses in the field. We concluded that the number of heterozygous PEUS SNPs would be a better predictor of MPH_GY and BPH_GY than GD. Hence, maize breeders could use heterozygous PEUS SNPs to select inbreds with high heterosis potential before actually making the crosses, thus improving the breeding efficiency.

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Revisiting Plant Heterosis—From Field Scale to Molecules

Cited by 23 publications

References 90 publications

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

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

Epigenetic variation: A major player in facilitating plant fitness under changing environmental conditions

Predicting heterosis via genetic distance and the number of SNPs in selected segments of chromosomes in maize

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