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Molecular cytogenetic discrimination and reaction to wheat streak mosaic virus and the wheat curl mite in Zhong series of wheat--Thinopyrum intermedium partial amphiploids.
Genome. 2003 Feb; 46(1):135-45.G

Abstract

Thinopyrum intermedium (2n = 6x = 42, JJJsJsSS) is potentially a useful source of resistance to wheat streak mosaic virus (WSMV) and its vector, the wheat curl mite (WCM). Five partial amphiploids, namely Zhong 1, Zhong 2, Zhong 3, Zhong 4, and Zhong 5, derived from Triticum aestivum x Thinopyrum intermedium crosses produced in China, were screened for WSMV and WCM resistance. Zhong 1 and Zhong 2 had high levels of resistance to WSMV and WCM. The other three partial amphiploids, Zhong 3, 4, and 5, were resistant to WSMV, but were susceptible to WCM. Genomic in situ hybridization (GISH) using a genomic DNA probe from Pseudoroegneria strigosa (SS, 2n = 14) demonstrated that two partial amphiploids, Zhong 1 and Zhong 2, have almost the identical 10 Th. intermedium chromosomes, including four Js, four J, and two S genome chromosomes. Both of them carry two pairs of J and a pair of Js genome chromosomes and two different translocations that were not observed in the other three Zhong lines. The partial amphiploids Zhong 3, 4, and 5 have another type of basic genomic composition, which is similar to a reconstituted alien genome consisting of four S and four Js genome chromosomes of Th. intermedium (Zhong 5 has two Js chromosomes plus two Js-W translocations) with six translocated chromosomes between S and Js or J genomes. All three lines carry a specific S-S-Js translocated chromosome, which might confer resistance to barley yellow dwarf virus (BYDV-PAV). The present study identified a specific Js2 chromosome present in all five of the Zhong lines, confirming that a Js chromosome carries WSMV resistance. Resistance to WCM may be linked with J or Js chromosomes. The discovery of high levels of resistance to both WSMV and WCM in Zhong 1 and Zhong 2 offers a useful source of resistance to both the virus and its vector for wheat breeding programs.

Authors+Show Affiliations

Chen Q
Agriculture and Agri-Food Canada, Lethbridge Research Centre, PO Box 3000, Lethbridge, AB T1J 4B1, Canada. chenqi@agr.gc.ca
Conner RL
No affiliation info available
Li HJ
No affiliation info available
Sun SC
No affiliation info available
Ahmad F
No affiliation info available
Laroche A
No affiliation info available
Graf RJ
No affiliation info available

MeSH

AgropyronAnimalsChromosomesHybridization, GeneticMitesPotyviridaeTriticum

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

12669806

Citation

Chen, Qin, et al. "Molecular Cytogenetic Discrimination and Reaction to Wheat Streak Mosaic Virus and the Wheat Curl Mite in Zhong Series of wheat--Thinopyrum Intermedium Partial Amphiploids." Genome, vol. 46, no. 1, 2003, pp. 135-45.
Chen Q, Conner RL, Li HJ, et al. Molecular cytogenetic discrimination and reaction to wheat streak mosaic virus and the wheat curl mite in Zhong series of wheat--Thinopyrum intermedium partial amphiploids. Genome. 2003;46(1):135-45.
Chen, Q., Conner, R. L., Li, H. J., Sun, S. C., Ahmad, F., Laroche, A., & Graf, R. J. (2003). Molecular cytogenetic discrimination and reaction to wheat streak mosaic virus and the wheat curl mite in Zhong series of wheat--Thinopyrum intermedium partial amphiploids. Genome, 46(1), 135-45.
Chen Q, et al. Molecular Cytogenetic Discrimination and Reaction to Wheat Streak Mosaic Virus and the Wheat Curl Mite in Zhong Series of wheat--Thinopyrum Intermedium Partial Amphiploids. Genome. 2003;46(1):135-45. PubMed PMID: 12669806.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Molecular cytogenetic discrimination and reaction to wheat streak mosaic virus and the wheat curl mite in Zhong series of wheat--Thinopyrum intermedium partial amphiploids. AU - Chen,Qin, AU - Conner,R L, AU - Li,H J, AU - Sun,S C, AU - Ahmad,F, AU - Laroche,A, AU - Graf,R J, PY - 2003/4/3/pubmed PY - 2003/11/5/medline PY - 2003/4/3/entrez SP - 135 EP - 45 JF - Genome JO - Genome VL - 46 IS - 1 N2 - Thinopyrum intermedium (2n = 6x = 42, JJJsJsSS) is potentially a useful source of resistance to wheat streak mosaic virus (WSMV) and its vector, the wheat curl mite (WCM). Five partial amphiploids, namely Zhong 1, Zhong 2, Zhong 3, Zhong 4, and Zhong 5, derived from Triticum aestivum x Thinopyrum intermedium crosses produced in China, were screened for WSMV and WCM resistance. Zhong 1 and Zhong 2 had high levels of resistance to WSMV and WCM. The other three partial amphiploids, Zhong 3, 4, and 5, were resistant to WSMV, but were susceptible to WCM. Genomic in situ hybridization (GISH) using a genomic DNA probe from Pseudoroegneria strigosa (SS, 2n = 14) demonstrated that two partial amphiploids, Zhong 1 and Zhong 2, have almost the identical 10 Th. intermedium chromosomes, including four Js, four J, and two S genome chromosomes. Both of them carry two pairs of J and a pair of Js genome chromosomes and two different translocations that were not observed in the other three Zhong lines. The partial amphiploids Zhong 3, 4, and 5 have another type of basic genomic composition, which is similar to a reconstituted alien genome consisting of four S and four Js genome chromosomes of Th. intermedium (Zhong 5 has two Js chromosomes plus two Js-W translocations) with six translocated chromosomes between S and Js or J genomes. All three lines carry a specific S-S-Js translocated chromosome, which might confer resistance to barley yellow dwarf virus (BYDV-PAV). The present study identified a specific Js2 chromosome present in all five of the Zhong lines, confirming that a Js chromosome carries WSMV resistance. Resistance to WCM may be linked with J or Js chromosomes. The discovery of high levels of resistance to both WSMV and WCM in Zhong 1 and Zhong 2 offers a useful source of resistance to both the virus and its vector for wheat breeding programs. SN - 0831-2796 UR - https://www.unboundmedicine.com/medline/citation/12669806/Molecular_cytogenetic_discrimination_and_reaction_to_wheat_streak_mosaic_virus_and_the_wheat_curl_mite_in_Zhong_series_of_wheat__Thinopyrum_intermedium_partial_amphiploids_ DB - PRIME DP - Unbound Medicine ER -