Dominance and epistasis are the main contributors to heterosis for plant height in rice

Shen, Gary X.; Zhan, Wei; Chen, Huaxia; Xing, Yongzhong

doi:10.1016/j.plantsci.2013.10.004

Cited by 56 publications

(46 citation statements)

References 44 publications

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“…S2). The CSSLs characters of 95.2% of genetic background recovery and 93.2% of genome coverage were reported in our previous report (Shen et al, 2014). The average size of single introgression segment is 7.2 cM.…”

supporting

confidence: 62%

Two Novel QTLs for Heading Date Are Identified Using a Set of Chromosome Segment Substitution Lines in Rice (Oryza sativa L.)

Shen

Xing

2014

Journal of Genetics and Genomics

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supporting

confidence: 62%

Two Novel QTLs for Heading Date Are Identified Using a Set of Chromosome Segment Substitution Lines in Rice (Oryza sativa L.)

Shen

Xing

2014

Journal of Genetics and Genomics

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“…Such studies are limited by the density and genomic coverage of genetic markers, so the most convincing genomic characterizations of heterosis come from genetic model systems including rice (Oryza sativa), maize, cotton (Gossypium hirsutum), and Arabidopsis (Arabidopsis thaliana). These genomic studies paint heterosis as the cumulative result of many loci that have a mixture of dominant, overdominant, and epistatic effects (Tang et al, 2010;Zhou et al, 2012;Shen et al, 2014;Shang et al, 2015). There is one notable exception to this pattern, a single locus controlling heterosis for yield in tomato (Solanum lycopersicum).…”

Section: Heterosismentioning

confidence: 99%

Hybridization in Plants: Old Ideas, New Techniques

2016

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Hybridization has played an important role in the evolution of many lineages. With the growing availability of genomic tools and advancements in genomic analyses, it is becoming increasingly clear that gene flow between divergent taxa can generate new phenotypic diversity, allow for adaptation to novel environments, and contribute to speciation. Hybridization can have immediate phenotypic consequences through the expression of hybrid vigor. On longer evolutionary time scales, hybridization can lead to local adaption through the introgression of novel alleles and transgressive segregation and, in some cases, result in the formation of new hybrid species. Studying both the abundance and the evolutionary consequences of hybridization has deep historical roots in plant biology. Many of the hypotheses concerning how and why hybridization contributes to biological diversity currently being investigated were first proposed tens and even hundreds of years ago. In this Update, we discuss how new advancements in genomic and genetic tools are revolutionizing our ability to document the occurrence of and investigate the outcomes of hybridization in plants.

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“…Despite substantial research on heterosis, the genetic underpinnings of the phenomenon are not yet fully understood. Dominance, overdominance, and epistasis (or digenic interactions) are three major genetic components involved in heterosis Luo et al 2001;Li et al 2008;Shen et al 2014). Dominance and overdominance are interactions of different alleles at the same locus, and epistasis describes interactions between different loci.…”

Section: Introductionmentioning

confidence: 99%

Identification of Heterosis QTLs for Yield and Yield-Related Traits in Indica-Japonica Recombinant Inbred Lines of Rice (Oryza sativa L.)

Kim

Chu

Park

et al. 2017

Plant Breed. Biotech.

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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. ABSTRACT Supplying sufficient rice to growing populations is a global challenge. Hybrid indica rice varieties exploiting heterosis have increased yields, but inter-subspecific crosses between indica and japonica varieties are hampered by sterility. Examination and genetic understanding of yield heterosis in indica/japonica crosses addressing yield barriers are basic requirements. In this study, QTLs for heterosis of yield traits were identified in indica-japonica recombinant inbred lines (RILs) using a total of 178 RILs originating from Dasanbyeo (indica) × TR22183 (japonica) (DT-RILs) and their backcrossed populations. Nine of sixty-six major quantitative trait loci (QTLs) identified in DT-RILs exhibited heterosis. Heterosis QTLs clustered with other traits on chromosomes 1, 4, and 8, and clusters were conserved between different RILs. The clusters contained several known yield enhancement genes/QTLs. Specific heterotic allele combinations contributed to four major heterosis QTLs, particularly for panicle and spikelet number traits. Heterosis for yield and yield-related traits was explained by the harmonized effects of overdominance, dominance, and epistatic interactions in inter-subspecific breeding populations.

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Dominance and epistasis are the main contributors to heterosis for plant height in rice

Cited by 56 publications

References 44 publications

Two Novel QTLs for Heading Date Are Identified Using a Set of Chromosome Segment Substitution Lines in Rice (Oryza sativa L.)

Two Novel QTLs for Heading Date Are Identified Using a Set of Chromosome Segment Substitution Lines in Rice (Oryza sativa L.)

Hybridization in Plants: Old Ideas, New Techniques

Identification of Heterosis QTLs for Yield and Yield-Related Traits in Indica-Japonica Recombinant Inbred Lines of Rice (Oryza sativa L.)

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