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Structural chromosome rearrangements and polymorphisms identified in Chinese wheat cultivars by high-resolution multiplex oligonucleotide FISH

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High-resolution multiplex oligonucleotide FISH revealed the frequent occurrence of structural chromosomal rearrangements and polymorphisms in widely grown wheat cultivars and their founders.

Abstract

Over 2000 wheat cultivars including 19 founders were released and grown in China from 1949 to 2000. To understand the impact of breeding selection on chromosome structural variations, high-resolution karyotypes of Chinese Spring (CS) and 373 Chinese cultivars were developed and compared by FISH (fluorescence in situ hybridization) using an oligonucleotide multiplex probe based on repeat sequences. Among them, 148 (39.7%) accessions carried 14 structural rearrangements including three single translocations (designated as T), eight reciprocal translocations (RT), one pericentric inversion (perInv), and two combined variations having both the deletion and single translocations. Five rearrangements were traced to eight founders, including perInv 6B detected in 57 cultivars originating from Funo, Abbondanza, and Fan 6, T 1RS∙1BL in 47 cultivars derived from the Lovrin series, RT 4AS∙4AL-1DS/1DL∙1DS-4AL in 31 varieties from Mazhamai and Bima 4, RT 1RS∙7DL/7DS∙1BL in three cultivars was from Aimengniu, and RT 5BS∙5BL-5DL/5DS∙5DL-5BL was only detected in Youzimai. In addition to structural rearrangements, 167 polymorphic chromosome blocks (defined as unique signal patterns of oligonucleotide repeat probes distributed within chromosomes) were identified, and 59 were present in one or more founders. Some specific types were present at high frequencies indicating selective blocks in Chinese wheat varieties. All cultivars and CS were clustered into four groups and 15 subgroups at chromosome level. Common block patterns occurred in the same subgroup. Origin, geographic distribution, probable adaptation to specific environments, and potential use of these chromosomal rearrangements and blocks are discussed.

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Acknowledgements

This project was supported by National Natural Science Foundation of China (31671681; 31370385) and the Fundamental Research Funds for the Central Universities (Y0201700147). Our thanks go to Prof. Zhengqiang Ma, Nanjing Agricultural University, Nanjing, Prof. Lihui Li, Chinese Academy of Agriculture Sciences, Beijing, and Prof. Jishan Niu, Henan Agricultural University, Zhengzhou, Henan, for review and suggestions on improving the manuscript, Prof. Xueyong Zhang, Chinese Academy of Agriculture Sciences, Beijing, for donating seeds of Aegilops speltoides and Triticum urartu, and Prof. Hisashi Tsujimoto, Arid Land Research Center, Tottori University, Japan, for donating seeds of Aegilops squarrosa. Thanks to Robert McIntosh, University of Sydney, Australia, for kind review, many suggestions, and editing. Xiejun Sun and Heng Nie kindly helped in preparing the manuscript. Our thanks also go to the editor and anonymous reviewers for critical comments and suggestions for improving the manuscript.

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Correspondence to Zengjun Qi or Honggang Wang.

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Communicated by P. Heslop-Harrison.

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Fig. S1

Pericentric inversion in chromosome 6B. CS and inverted ideotypes are shown left and right, respectively. Red signals show oligonucleotides pAs1-1, pAs1-3, pAs1-4, pAs1-6, AFA-3, and AFA-4 modified with TAMRA, green show pSc119.2-1 and (GAA)10 modified with FAM (TIFF 1277 kb)

Fig. S2

Oligonucleotide multiplex painted karyotypes of cultivars with the pericentric inversion of 6B. Colors, as in Fig. S1 (TIFF 72694 kb)

Fig. S3

Oligonucleotide multiplex painted karyotypes of cultivars containing T 1RS•1BL. Colors, as in Fig. S1 (TIFF 57405 kb)

Fig. S4

Identification of T 1RS•1BL in Lovrin 10 (17Z064) and RT 1RS•7DL / 7DS•1BL in Aimengniu (17Z225). a, b, and c II, chromosomes after GISH/FISH using multiplex probes containing Secale cereale genomic DNA labeled with fluorescein-12-dUTP (green), TAMRA-modified oligonucleotide probes pAs1-1, pAs1-3, pAs1-4, pAs1-6, AFA-3, and AFA-4 (red), and FAM-modified pSc119.2-1 and (GAA)10 (green). c I, Chromosomes after FISH using the oligonucleotide multiplex probe containing FAM-modified pSc119.2-1 and (GAA)10 (green), TAMRA-modified pAs1-1, pAs1-3, pAs1-4, pAs1-6, AFA-3, and AFA-4 (red). a, Lovrin 10 (17Z064). b, Aimengniu (17Z225). c, Karyotypes of Lovrin 10 and Aimengniu (TIFF 22357 kb)

Fig. S5

Oligonucleotide multiplex painted karyotypes of cultivars containing RT 4AS•4AL-1DS/1DL•1DS-4AL from Mazhamai (17Z377), a Chinese landrace. Red signals show oligonucleotides pAs1-1, pAs1-3, pAs1-4, pAs1-6, AFA-3, and AFA-4 modified with TAMRA, green shows pSc119.2-1 and (GAA)10 modified with FAM (TIFF 33455 kb)

Fig. S6

Karyotypes of cultivars with 11 structural rearrangements detected in chromosomes of widely grown Chinese wheat cultivars, except T 1RS•1BL, RT 1RS•7DL / 7DS•1BL and perInv 6B. Red signals show oligonucleoties pAs1-1, pAs1-3, pAs1-4, pAs1-6, AFA-3, and AFA-4 modified with TAMRA, green shows pSc119.2-1 and (GAA)10 modified with FAM. *, translocation or deletion chromosome (TIFF 34253 kb)

Fig. S7

Identification of RT 4AS•4AL-1BL / 1BS•1BL-4AL in accession 17Z283 (Xiangnong 2170-7-27). a, Chromosome FISH using the oligonucleotide multiplex probe containing pSc119.2-1 (green), (GAA)10 (green), pAs1-1 (red), pAs1-3 (red), pAs1-4 (red), pAs1-6 (red), AFA-3 (red), and AFA-4(red); b, chromosome FISH using multiplex probes containing the SS genome labeled with fluorescein-12-dUTP (green), (GAA)10 (red), and pSc119.2-1 (red) after FISH. c, Karyotype of CS and 17Z283, I: probes as shown in a, II: probes as shown in b. * translocation chromosome(TIFF 16114 kb)

Fig. S8

Identification of T 1BL•1RS and RT 2AL•2AS-5BL / 5BS•5BL-2AS in accession 17Z340 (Xiangnong 153-27). a, Chromosome FISH of CS using multiplex probe containing the SS genome (green), (GAA)10 (red) and pSc119.2-1 (red). b, Chromosome FISH of accession 17Z340 using multiplex probe containing the SS genome (green), (GAA)10 (red), and pSc119.2-1 (red). c, Karyotype of CS and 17Z340 (A and B genomes), I : probes using multiplex probe containing (GAA)10 (green), pSc119.2-1 (green), pAs1-1 (red), pAs1-3 (red), pAs1-4 (red), pAs1-6 (red), AFA-3 (red), and AFA-4 (red). II: CS, probes using multiplex probe containing (GAA)10 (green), pSc119.2-1 (green); 17Z340, probes as shown in b; III: CS, probes as shown in a. * translocation chromosome (TIFF 26068 kb)

Fig. S9

Identification of 1B deletion and T 1BS-3DS•3DL in accession 17Z172 (Shannongfu 63). a and b, Sequential FISH with 45S rDNA plasmid clones labeled with digoxigenin-11-dUTP (red), and oligonucleotides pSc119.2-1 (green), (GAA)10 (green) (a), and pAs1-1 (red), pAs1-3 (red), pAs1-4 (red), pAs1-6 (red), AFA-3 (red), and AFA-4 (red) (b) on chromosomes of accession 17Z172. c, Multiplex FISH-based karyotype of 17Z172, i: probes using multiplex probes containing (GAA)10 (green), pSc119.2-1 (green), pAs1-1 (red), pAs1-3 (red), pAs1-4 (red), pAs1-6 (red), AFA-3 (red), and AFA-4 (red); ii: sequential FISH karyotype using 45S rDNA plasmid clones labeled with digoxigenin-11-dUTP (red), and oligonucleotides pSc119.2-1 (green), (GAA)10 (green) as shown in a; iii: probes using oligonucleotides pAs1-1 (red), pAs1-3 (red), pAs1-4 (red), pAs1-6 (red) as shown in b. d, Chromosome FISH of 17Z172 using the multiplex oligonucleotides probe containing pSc119.2-1 (green), (GAA)10 (green), pAs1-1 (red), pAs1-3 (red), pAs1-4 (red), pAs1-6 (red), AFA-3 (red), and AFA-4 (red). e and f, Chromosome FISH of 17Z172 (e) and CS (f) using multiplex probe containing 45S rDNA plasmid clones labeled with digoxigenin-11-dUTP (red), pSc119.2-1(green), and (GAA)10 (green). g, Chromosomes 1A, 1B, 6B, 3D, 5D, and 7D of CS and 17Z172. I: multiplex probe using (GAA)10 (green), pSc119.2-1 (green), pAs1-1 (red), pAs1-3 (red), pAs1-4 (red), pAs1-6 (red), AFA-3 (red), and AFA-4 (red). II, Multiplex probe using 45S rDNA plasmid clones labeled with digoxigenin-11-dUTP (red), and oligonucleotides (GAA)10 (green), pSc119.2-1 (green). III, From different cells of 17Z172, probes as shown in II. * translocation or deletion chromosome (TIFF 30058 kb)

Fig. S10

Identification of T 6VS•6AL in YM18 (Yangmai 18) and T 6VS•6DL in YM22 (Yangmai 22). a, b, and c II, Chromosome FISH using multiplex probes containing the Haynaldia villosa genome labeled with fluorescein-12-dUTP (green), pSc119.2-1 (green), (GAA)10 (green), pAs1-1 (red), pAs1-3 (red), pAs1-4 (red), pAs1-6 (red), AFA-3 (red), and AFA-4 (red). cI, Chromosome FISH using the oligonucleotide multiplex probe containing pSc119.2-1 (green), (GAA)10 (green), pAs1-1 (red), pAs1-3 (red), pAs1-4 (red), pAs1-6 (red), AFA-3 (red), and AFA-4(red). a, Yangmai 18. b, Yangmai 22. c, Karyotype of Yangmai 18 and Yangmai 22. * translocation chromosome (TIFF 17637 kb)

Fig. S11

Lovrin 10 (accession 17Z064) and part derivatives. Red signals show oligonucleoties pAs1-1, pAs1-3, pAs1-4, pAs1-6, AFA-3, and AFA-4 modified with TAMRA, green show pSc119.2-1 and (GAA)10 modified with FAM (TIFF 13829 kb)

Fig. S12

Funo (accession 17Z379) and derivatives (left: A and right: B). Colors, as in Fig. S1 (TIFF 6798 kb)

Fig. S13

Xiaoyan 6 (accession 17Z298) and derivatives. Colors, as in Fig. S1 (TIFF 27191 kb)

Fig. S14

Yanda 1817 (accession 17Z141) and derivatives. Colors, as in Fig. S1 (TIFF 28654 kb)

Fig. S15

Nanda 2419 (accession 17Z343) and derivatives. Colors, as in Fig. S1 (TIFF 117414 kb)

Fig. S16

Bima selections and their derivatives. Colors, as in Fig. S1 (TIFF 112782 kb)

Fig. S17

Other accessions. Colors, as in Fig. S1 (TIFF 44883 kb)

Fig. S18

Cluster analysis of 373 Chinese wheat cultivars and Chinese Spring based on structural rearrangements and polymorphic blocks (DOCX 660 kb)

Supplementary material 19 (DOCX 68 kb)

Supplementary material 20 (DOCX 78 kb)

Supplementary material 21 (DOCX 24 kb)

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Huang, X., Zhu, M., Zhuang, L. et al. Structural chromosome rearrangements and polymorphisms identified in Chinese wheat cultivars by high-resolution multiplex oligonucleotide FISH. Theor Appl Genet 131, 1967–1986 (2018). https://doi.org/10.1007/s00122-018-3126-2

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  • DOI: https://doi.org/10.1007/s00122-018-3126-2

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