Global transcriptional profiling between inbred parents and hybrids provides comprehensive insights into ear-length heterosis of maize (Zea mays)

Zhang, Xiangge; Ma, Chenchen; Wang, Xiaoqing; Wu, Mingbo; Shao, Jingkuan; Huang, Li; Liu, Yuan; Fu, Zhiyuan; Li, Weihua; Zhang, Xuehai; Guo, Zhanyong; Tang, Jihua

doi:10.1186/s12870-021-02890-1

Cited by 5 publications

(3 citation statements)

References 74 publications

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“…The effect of heterosis is most evident for traits at the adult stage of plant development, like crop yield, fertility, and biomass ( Flint-Garcia et al, 2009 ). Total grain yield in maize is mainly determined by the highly heterotic traits ear length, ear diameter, number of kernels per ear, and thousand-kernel weight ( Austin and Lee, 1998 ; Wang et al, 2007 ; Flint-Garcia et al, 2009 ; Zhang et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Single-parent expression complementation contributes to phenotypic heterosis in maize hybrids

et al. 2022

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The dominance model of heterosis explains the superior performance of F1 hybrids via the complementation of deleterious alleles by beneficial alleles in many genes. Genes active in one parent but inactive in the second lead to single-parent expression (SPE) complementation in maize (Zea mays L.) hybrids. In this study, SPE complementation resulted in ∼700 additionally active genes in different tissues of genetically diverse maize hybrids on average. We established that the number of SPE genes is significantly associated with mid-parent heterosis for all surveyed phenotypic traits. In addition, we highlighted that maternally (SPE_B) and paternally (SPE_X) active SPE genes enriched in gene co-expression modules are highly correlated within each SPE type but separated between these two SPE types. While SPE_B-enriched co-expression modules are positively correlated with phenotypic traits, SPE_X-enriched modules displayed a negative correlation. Gene Ontology (GO) term enrichment analyses indicated that SPE_B patterns are associated with growth and development, whereas SPE_X patterns are enriched in defense and stress response. In summary, these results link the degree of phenotypic mid-parent heterosis to the prevalence of gene expression complementation observed by SPE, supporting the notion that hybrids benefit from SPE complementation via its role in coordinating maize development in fluctuating environments.

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Section: Introductionmentioning

confidence: 99%

Single-parent expression complementation contributes to phenotypic heterosis in maize hybrids

et al. 2022

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“… b [1] Krieger et al., 2010; [2] Li et al., 2013; [3] Guo, Rupe, et al., 2014; [4] Huang et al., 2015; [5] Huang et al., 2016; [6] Xu et al., 2016; [7] Yang et al., 2017; [8] Zhang et al., 2017; [9] Liu et al., 2019; [10] Shao et al., 2019; [11] Ning et al., 2021; [12] Zhang et al., 2021; [13] Zhou et al., 2021; [14] Sun et al., 2023; [15] Wang et al., 2023. …”

Section: Genetic Basis Of Heterosismentioning

confidence: 99%

Heterosis in crop improvement

Paril,

Reif,

Fournier‐Level

et al. 2023

The Plant Journal

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SUMMARYHeterosis, also known as hybrid vigor, is the phenomenon wherein a progeny exhibits superior traits relative to one or both parents. In terms of crop breeding, this usually refers to the yield advantage of F1 hybrids over both inbred parents. The development of high‐yielding hybrid cultivars across a wider range of crops is key to meeting future food demands. However, conventional hybrid breeding strategies are proving to be exceptionally challenging to apply commercially in many self‐pollinating crops, particularly wheat and barley. Currently in these crops, the relative performance advantage of hybrids over inbred line cultivars does not outweigh the cost of hybrid seed production. Here, we review the genetic basis of heterosis, discuss the challenges in hybrid breeding, and propose a strategy to recruit multiple heterosis‐associated genes to develop lines with improved agronomic characteristics. This strategy leverages modern genetic engineering tools to synthesize supergenes by fusing multiple heterotic alleles across multiple heterosis‐associated loci. We outline a plan to assess the feasibility of this approach to improve line performance using barley (Hordeum vulgare) as the model self‐pollinating crop species, and a few heterosis‐associated genes. The proposed method can be applied to all crops for which heterotic gene combinations can be identified.

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“…Current hypotheses explaining heterosis including dominance, complementation, overdominance, and epistasis cannot fully explain the underlying mechanism [ 3 ]. The genetic basis of heterosis has been analyzed from a range of perspectives and various differentially expressed genes (DEGs) show potential influence on heterosis [ 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

SiMYBS3, Encoding a Setaria italica Heterosis-Related MYB Transcription Factor, Confers Drought Tolerance in Arabidopsis

Liu

Zhang

Sun

et al. 2023

IJMS

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Drought is a major limiting factor affecting grain production. Drought-tolerant crop varieties are required to ensure future grain production. Here, 5597 DEGs were identified using transcriptome data before and after drought stress in foxtail millet (Setaria italica) hybrid Zhangza 19 and its parents. A total of 607 drought-tolerant genes were screened through WGCNA, and 286 heterotic genes were screened according to the expression level. Among them, 18 genes overlapped. One gene, Seita.9G321800, encoded MYBS3 transcription factor and showed upregulated expression after drought stress. It is highly homologous with MYBS3 in maize, rice, and sorghum and was named SiMYBS3. Subcellular localization analysis showed that the SiMYBS3 protein was located in the nucleus and cytoplasm, and transactivation assay showed SiMYBS3 had transcriptional activation activity in yeast cells. Overexpression of SiMYBS3 in Arabidopsis thaliana conferred drought tolerance, insensitivity to ABA, and earlier flowering. Our results demonstrate that SiMYBS3 is a drought-related heterotic gene and it can be used for enhancing drought resistance in agricultural crop breeding.

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Global transcriptional profiling between inbred parents and hybrids provides comprehensive insights into ear-length heterosis of maize (Zea mays)

Cited by 5 publications

References 74 publications

Single-parent expression complementation contributes to phenotypic heterosis in maize hybrids

Single-parent expression complementation contributes to phenotypic heterosis in maize hybrids

Heterosis in crop improvement

SiMYBS3, Encoding a Setaria italica Heterosis-Related MYB Transcription Factor, Confers Drought Tolerance in Arabidopsis

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