Embryo lethality in wheat × rye hybrids—mode of inheritance and the identification of a complementary gene in wheat

Tikhenko, N.; Tsvetkova, Natalia; Voylokov, A. V.; Dobrovolskaya, O. B.; Nezhad, Khalil Zaynali; Röder, Marion S.; Börner, Andreas

doi:10.1007/s10681-010-0202-3

Cited by 7 publications

(5 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…6 ; Supplementary Movie 1 ). Tetrasomy for chromosome 1B partially compensated for the absence of 1D for spike productivity in wheat (Table 1 ; Supplementary Table 2a ) and the intergeneric crosses with rye 13 . This confirms the presence of a homoeologous locus on chromosome 1B, which we named Dee-B1 .…”

Section: Discussionmentioning

confidence: 99%

“…In our concept of the evolution of wheat, we propose that the emergence of the tetraploid form was the result of combining in one genotype of the progenitor of B genome at least two major speciation loci with positive effect: (i) Ph1 , localized on chromosome 5B, providing the bivalent pairing between the homologous chromosomes during meiosis 29 and (ii) Dee-B1 , localized on chromosome 1B, regulating the normal development of the endosperm in the newly formed hybrid organism 13 . The role of the A genome in the evolution of the first tetraploid and eventually hexaploid wheat was the introduction of a dominant locus, which we have tentatively named Sf-A1 .…”

Section: Discussionmentioning

confidence: 99%

“…In our previous studies we have shown that, in crosses between hexaploid wheat and rye, the wheat chromosome 1D has a strong influence on embryo lethality and endosperm abortion during hybrid seed development. Since tetrasomy for chromosome 1B partially compensated for the absence of 1D, chromosome 1B may carry homoeoallele(s) of this 1D locus (or loci) 13 .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

DEFECTIVE ENDOSPERM-D1 (Dee-D1) is crucial for endosperm development in hexaploid wheat

et al. 2020

View full text Add to dashboard Cite

Hexaploid wheat (Triticum aestivum L.) is a natural allopolyploid and provides a usable model system to better understand the genetic mechanisms that underlie allopolyploid speciation through the hybrid genome doubling. Here we aimed to identify the contribution of chromosome 1D in the development and evolution of hexaploid wheat. We identified and mapped a novel DEFECTIVE ENDOSPERM–D1 (Dee-D1) locus on 1DL that is involved in the genetic control of endosperm development. The absence of Dee-D1 leads to non-viable grains in distant crosses and alters grain shape, which negatively affects grain number and thousand-grain weight. Dee-D1 can be classified as speciation locus with a positive effect on the function of genes which are involved in endosperm development in hybrid genomes. The presence of Dee-D1 is necessary for the normal development of endosperm, and thus play an important role in the evolution and improvement of grain yield in hexaploid wheat.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

DEFECTIVE ENDOSPERM-D1 (Dee-D1) is crucial for endosperm development in hexaploid wheat

et al. 2020

View full text Add to dashboard Cite

show abstract

“…CS is a carrier of the Eml-A1 allele located in the long arm of wheat chromosome 6A 22 , 23 , which interacts with the incompatible allele Eml-R1b of rye (line L2) and leads to embryo lethality. A cross between CS and the inbred rye line L2 is therefore classified as an incompatible cross.…”

Section: Methodsmentioning

confidence: 99%

Major chromosome rearrangements in intergeneric wheat × rye hybrids in compatible and incompatible crosses detected by GBS read coverage analysis

Tikhenko,

Haupt,

Fuchs

et al. 2024

Sci Rep

View full text Add to dashboard Cite

The presence of incompatibility alleles in primary amphidiploids constitutes a reproductive barrier in newly synthesized wheat-rye hybrids. To overcome this barrier, the genome stabilization process includes large-scale chromosome rearrangements. In incompatible crosses resulting in fertile amphidiploids, the elimination of one of the incompatible alleles Eml-A1 or Eml-R1b can occur already in the somatic tissue of the wheat × rye hybrid embryo. We observed that the interaction of incompatible loci Eml-A1 of wheat and Eml-R1b of rye after overcoming embryo lethality leads to hybrid sterility in primary triticale. During subsequent seed reproductions (R1, R2 or R3) most of the chromosomes of A, B, D and R subgenomes undergo rearrangement or eliminations to increase the fertility of the amphidiploid by natural selection. Genotyping-by-sequencing (GBS) coverage analysis showed that improved fertility is associated with the elimination of entire and partial chromosomes carrying factors that either cause the disruption of plant development in hybrid plants or lead to the restoration of the euploid number of chromosomes (2n = 56) in the absence of one of the incompatible alleles. Highly fertile offspring obtained in compatible and incompatible crosses can be successfully adapted for the production of triticale pre-breeding stocks.

show abstract

“…In intergeneric hybridization between wheat ( Triticum durum ) and rye ( Secale cereale ), both belonging to tribe Triticeae , despite normal endosperm development, the development of shoot apical meristem (SAM) in hybrid embryo is arrested, leading to incompletely differentiated embryos and non-germinating seeds ( Tikhenko et al., 2005 ; Tikhenko et al., 2008 ). Hybrid embryo lethality in this cross is caused by the interaction between two alleles from two loci, i.e., wheat embryo lethality ( Eml ) -A1 and rye Eml-R1 , which are likely to be orthologous genes ( Tikhenko et al., 2010 ; Tikhenko et al., 2011 ). Gene mapping results implied that Eml-A1 is involved in SAM maintenance, and thus, the underlying cause of hybrid seed lethality is the embryo itself ( Tikhenko et al., 2017a ).…”

Section: Hybrid Seed Lethalitymentioning

confidence: 99%

Understanding and overcoming hybrid lethality in seed and seedling stages as barriers to hybridization and gene flow

Shiragaki

Tezuka³

2023

Front. Plant Sci.

View full text Add to dashboard Cite

Hybrid lethality is a type of reproductive isolation barrier observed in two developmental stages, hybrid embryos (hybrid seeds) and hybrid seedlings. Hybrid lethality has been reported in many plant species and limits distant hybridization breeding including interspecific and intergeneric hybridization, which increases genetic diversity and contributes to produce new germplasm for agricultural purposes. Recent studies have provided molecular and genetic evidence suggesting that underlying causes of hybrid lethality involve epistatic interaction of one or more loci, as hypothesized by the Bateson–Dobzhansky–Muller model, and effective ploidy or endosperm balance number. In this review, we focus on the similarities and differences between hybrid seed lethality and hybrid seedling lethality, as well as methods of recovering seed/seedling activity to circumvent hybrid lethality. Current knowledge summarized in our article will provides new insights into the mechanisms of hybrid lethality and effective methods for circumventing hybrid lethality.

show abstract

Embryo lethality in wheat × rye hybrids—mode of inheritance and the identification of a complementary gene in wheat

Cited by 7 publications

References 31 publications

DEFECTIVE ENDOSPERM-D1 (Dee-D1) is crucial for endosperm development in hexaploid wheat

DEFECTIVE ENDOSPERM-D1 (Dee-D1) is crucial for endosperm development in hexaploid wheat

Major chromosome rearrangements in intergeneric wheat × rye hybrids in compatible and incompatible crosses detected by GBS read coverage analysis

Understanding and overcoming hybrid lethality in seed and seedling stages as barriers to hybridization and gene flow

Contact Info

Product

Resources

About