1
|
Mihók E, Polgári D, Lenykó-Thegze A, Makai D, Fábián A, Ali M, Kis A, Sepsi A, Sági L. Plasticity of parental CENH3 incorporation into the centromeres in wheat × barley F1 hybrids. FRONTIERS IN PLANT SCIENCE 2024; 15:1324817. [PMID: 38313805 PMCID: PMC10834757 DOI: 10.3389/fpls.2024.1324817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 01/04/2024] [Indexed: 02/06/2024]
Abstract
Incorporating the centromere-specific histone H3 protein CENH3 into the centromeric nucleosomes is indispensable for accurate centromere function and balanced chromosome segregation in most eukaryotes, including higher plants. In the cell nuclei of interspecific hybrids, divergent centromeric DNAs cohabit and lead the corresponding parental chromosomes through the mitotic and meiotic cell divisions. Depending on the transmission of the parental chromosomes carrying the CENH3-encoding genes, CENH3 proteins from one or both parents may be present in these hybrids. The incorporation of parental CENH3 proteins into the divergent centromeres and their role in the chromosome elimination process in interspecific hybrids is still poorly understood. Here, we produced wheat × barley F1 hybrids that carried different combinations of barley chromosomes with genes encoding for either one (αCENH3) or both barley CENH3 protein variants (α- and βCENH3). We generated specific antibodies distinguishing between the wheat CENH3 proteins and barley αCENH3 and applied them together with FISH probes to detect the precise pattern of parental CENH3 deposition into the wheat and barley centromeric nucleosomes. Analysis of somatic and meiotic nuclei of the wheat × barley hybrids revealed the plasticity of the maternal (wheat) CENH3 proteins to become incorporated into the paternal (barley) centromeric nucleosomes. However, no evidence for paternal CENH3 plasticity was detected in this study. The significance of the unilateral centromere plasticity and possible patterns of CENH3 incorporation into centromeres in interspecific hybrids are discussed.
Collapse
Affiliation(s)
- Edit Mihók
- Centre for Agricultural Research, Hungarian Research Network, Martonvásár, Hungary
- Doctoral School of Plant Sciences, Hungarian University of Agriculture and Life Sciences, Gödöllő, Hungary
| | - Dávid Polgári
- Centre for Agricultural Research, Hungarian Research Network, Martonvásár, Hungary
- Institute of Genetics and Biotechnology, Hungarian University of Agriculture and Life Sciences, Gödöllő, Hungary
- Agribiotechnology and Precision Breeding for Food Security National Laboratory, Plant Biotechnology Section, Centre for Agricultural Research, Martonvásár, Hungary
| | - Andrea Lenykó-Thegze
- Centre for Agricultural Research, Hungarian Research Network, Martonvásár, Hungary
| | - Diána Makai
- Centre for Agricultural Research, Hungarian Research Network, Martonvásár, Hungary
- Doctoral School of Plant Sciences, Hungarian University of Agriculture and Life Sciences, Gödöllő, Hungary
| | - Attila Fábián
- Centre for Agricultural Research, Hungarian Research Network, Martonvásár, Hungary
| | - Mohammad Ali
- Doctoral School of Plant Sciences, Hungarian University of Agriculture and Life Sciences, Gödöllő, Hungary
- Institute of Genetics and Biotechnology, Hungarian University of Agriculture and Life Sciences, Gödöllő, Hungary
| | - András Kis
- Institute of Genetics and Biotechnology, Hungarian University of Agriculture and Life Sciences, Gödöllő, Hungary
| | - Adél Sepsi
- Centre for Agricultural Research, Hungarian Research Network, Martonvásár, Hungary
| | - László Sági
- Centre for Agricultural Research, Hungarian Research Network, Martonvásár, Hungary
- Agribiotechnology and Precision Breeding for Food Security National Laboratory, Plant Biotechnology Section, Centre for Agricultural Research, Martonvásár, Hungary
| |
Collapse
|
2
|
Polgári D, Mihók E, Sági L. Composition and random elimination of paternal chromosomes in a large population of wheat × barley (Triticum aestivum L. × Hordeum vulgare L.) hybrids. PLANT CELL REPORTS 2019; 38:767-775. [PMID: 30953138 PMCID: PMC6531609 DOI: 10.1007/s00299-019-02405-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 03/19/2019] [Indexed: 05/27/2023]
Abstract
Statistical analysis of the chromosomal composition in a population of 210 primary plants regenerated from two intergeneric wheat-barley cross combinations revealed the random nature of uniparental elimination for barley chromosomes. Uniparental chromosome elimination is a common process in interspecific and intergeneric cereal hybrids. To characterize the frequency of paternal chromosomes, a population of 218 independent green plants was generated from two wheat (♀) × barley (♂) cross combinations via embryo rescue. The chromosomal composition of 210 primary plants was analyzed with chromosome-specific DNA markers representing all seven barley chromosomes. The analysis revealed an equal proportion of haploid and full hybrids (20.5% and 19.5%, respectively), while the rest of the population contained hypoploids (partial hybrids) with no preference for any possible numbers (one to six) of barley chromosome additions. Contrary to the previous reports, there was no statistical bias or preferential elimination for any individual barley chromosome (1H-7H) in this population. The reasons for the apparent contradiction and the implications of the above findings for cereal breeding are discussed.
Collapse
Affiliation(s)
- Dávid Polgári
- Centre for Agricultural Research, Hungarian Academy of Sciences, Martonvásár, 2462, Hungary
- Szent István University, Gödöllő, 2100, Hungary
| | - Edit Mihók
- Szent István University, Gödöllő, 2100, Hungary
| | - László Sági
- Centre for Agricultural Research, Hungarian Academy of Sciences, Martonvásár, 2462, Hungary.
| |
Collapse
|
3
|
Polgári D, Cseh A, Szakács É, Jäger K, Molnár-Láng M, Sági L. High-frequency generation and characterization of intergeneric hybrids and haploids from new wheat-barley crosses. PLANT CELL REPORTS 2014; 33:1323-31. [PMID: 24770442 DOI: 10.1007/s00299-014-1618-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2014] [Revised: 03/24/2014] [Accepted: 04/05/2014] [Indexed: 05/06/2023]
Abstract
Hybrid plants and a high frequency of maternal haploids were obtained using an efficient wheat-barley hybridization system (with new genotype combinations) and confirmed by several cytological and molecular tools. An efficient hybridization system between wheat (Triticum aestivum L.) and barley (Hordeum vulgare L.) is presented on the basis of three new genotype combinations. A particularly high, 14% frequency of plant regeneration per florets was achieved in the wheat-barley genotype combination of 'Sichuan' × 'Morex'. The genome composition in 42 of the 95 plants regenerated by embryo rescue was determined using ploidy analysis, genomic in situ hybridization and the application of chromosome arm-specific molecular markers (SSR and STS). A high overall frequency (76%) of maternal (wheat) haploids was observed in all the tests for all three cross combinations. A major implication of this observation is that this new hybridization system represents a useful tool to study the mechanism of uniparental chromosome elimination in cereals.
Collapse
Affiliation(s)
- Dávid Polgári
- Centre for Agricultural Research, Agricultural Institute, Hungarian Academy of Sciences, Brunszvik u. 2, Martonvásár, 2462, Hungary
| | | | | | | | | | | |
Collapse
|
4
|
BJØRNSTAD ÅSMUND. Partial incompatibility between Scandinavian six-rowed barleys (Hordeum vulgare L.) and Hordeum bulbosum L., and its genetical basis. Hereditas 2008. [DOI: 10.1111/j.1601-5223.1986.tb00530.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
|
5
|
Taketa S, Kato J, Takeda K. High crossability of wild barley (Hordeum spontaneum C. Koch) with bread wheat and the differential elimination of barley chromosomes in the hybrids. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 1995; 91:1203-9. [PMID: 24170047 DOI: 10.1007/bf00220930] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/1995] [Accepted: 07/21/1995] [Indexed: 05/06/2023]
Abstract
Four bread wheat (Triticum aestivum L.) cultivars, 'Aobakomugi', 'Chinese Spring', 'Norin 61' and 'Shinchunaga', were pollinated with five barley lines/cultivars consisting of three cultivated barley (Hordeum vulgare L.) lines, 'Betzes', 'Kinai 5' and OHL089, and two wild barley (Hordeum spontaneum C. Koch) lines, OUH602 and OUH324. Crossability, expressed as the percentage of embryo formation, varied from 0 to 55.4% among the cross combinations. The two wild barley lines generally had a higher crossability than the previously reported best pollinator, 'Betzes', and some Japanese wheat cultivars were better as the female parent than 'Chinese Spring'. Ninety four hybrid plants were obtained from 250 embryos cultured, and their somatic chromosome numbers ranged from 21 to 36. Eighteen plants were mosaic in chromosome number. Twenty one-chromosome plants appeared most frequently (45.7%) followed by 28-chromosome plants (14.9%). C-banding analysis revealed that elimination of barley chromosomes was mainly responsible for the occurrence of aneuploid plants. In hypoploids derived from 'Betzes'-crosses, chromosome 5 was preferentially eliminated as previously reported, while in hypoploids derived from OUH602-crosses, chromosome 4 was preferentially eliminated. The wild barley line OUH602 may be a useful parent for producing a new wheat-barley addition set because of its high crossability with wheat and a different pattern of chromosome elimination.
Collapse
Affiliation(s)
- S Taketa
- Research Institute for Bioresources, Okayama University, 710, Kurashiki, Japan
| | | | | |
Collapse
|
6
|
Laurie DA, Bennett MD. The effect of the crossability loci Kr1 and Kr2 on fertilization frequency in hexaploid wheat x maize crosses. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 1987; 73:403-409. [PMID: 24241002 DOI: 10.1007/bf00262508] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/1986] [Accepted: 08/31/1986] [Indexed: 06/02/2023]
Abstract
Dominant alleles of the Kr1 and Kr2 genes reduce the crossability of hexaploid wheat with many alien species, including rye and Hordeum bulbosum, with Kr1 having the greater effect. However, a cytological study of wheat ovaries fixed 48 h after pollination showed that the wheat genotypes 'Highbury' (kr1, Kr2) and 'Chinese Spring (Hope 5B)' (kr1, kr2) were crossable with 'Seneca 60' maize, fertilization occurring in 14.4 and 30.7% of embryo sacs respectively. The latter figure was similar to the 29.7% fertilization found in 'Chinese Spring' (kr1, kr2). Most embryo sacs in which fertilization occurred contained an embryo but lacked an endosperm and where an endosperm was formed it was usually highly aberrant. All three wheat x maize combinations were karyotypically unstable and rapidly eliminated maize chromosomes to produce haploid wheat embryos.
Collapse
Affiliation(s)
- D A Laurie
- Plant Breeding Institute, Maris Lane, CB2 2LQ, Trumpington, Cambridge, England
| | | |
Collapse
|