Associated Effects of Chromosome 1B/1R Translocation on Agronomic Traits in Hexaploid Wheat.

Villareal, R. L.; Mujeeb‐Kazi, A.; Rajaram, S.; Toro, E. Del

doi:10.1270/jsbbs1951.44.7

Cited by 22 publications

(33 citation statements)

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“…A way for increasing the genetic variability, as a basic premise of successful breeding, was found through the exploitation of rye genome (Riley and Kimber, 1966). Of particular interest is the short arm of chromosome 1R of rye established that carries many desirable genes increasing the stability and level of yield, water use efficiency, resistance to certain pests diseases and tolerance to different stress conditions (McIntosh, 1983, Rajaram et al, 1983, Villareal, 1994, Mirzaghaderi et al, 2011. The translocation between the short arm of chromosome 1R of rye and the long arm of chromosome 1A, 1B or 1D of wheat represents practically the most common introduced foreign genes into the genome of hexaploid wheat (Denčić et al, 2008).…”

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1RS translocation in Croatian winter wheat varieties

et al. 2015

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SUMMARYThe translocation between the short arm of chromosome 1R of rye and the long arm of chromosome 1A, 1B or 1D of wheat represents practically the most common introduced foreign genes into the genome of hexaploid wheat. 1RS chromosome arm represents a source of different useful genes, associated with increased disease resistance, improved adaptability, stress tolerance, and increased stability and level of yield. On the other hand, translocation is associated with poor technological quality of wheat as a result of the presence of secalin and reduced number of gluten loci. The aim of this study was to determine the prevalence of 1RS translocation among some Croatian winter wheat varieties using molecular markers. The study included 40 varieties of which 23 Croatian. Four pairs of primers: RIS, SCM9, RYE-NOR and PAW161 were used for determination of translocation. The presence of translocation was determined in 12 of 40 (30%) varieties, while among the Croatian wheat varieties translocation had 8 of 23 (34.78%) varieties (Zlatna Dolina, Barbara, Nova Žitarka, Marija, Prima, Kuna, Koleda and Dea).

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1RS translocation in Croatian winter wheat varieties

et al. 2015

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“…Presence of the rye arm has been further associated with high yield, stability and wide adaptability of wheat germplasm, specifically for the cultivar Veery cross (Rajaram et al 1983, Villareal et al 1994). The Veery lines were derived from the 1BL/1RS winter bread wheat variety Kavkaz.…”

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“…Global wheat varietal releases possessing the 1BL/1RS translocation currently occupy over five million hectares of cultivated area. Approximately 40.0% of our germplasm (Rajaram et al 1990) and up to 85.0% of Pakistan wheat varieties in yield trials (Jahan et al 1990, Ter-Kuile et al 1991 possess the homozygous 1BL/1RS translocation.Recently it was suggested (Villareal et al 1994) that 1BL/1RS wheat varieties exhibit a yield advantage over 1B wheat varieties. Further (Villareal et al 1995) in a two year yield trial study based upon random F2 derived F6 advanced lines from a Nacozari (1B)/Seri 82 (1BL/ 1RS) cross concluded that there was a 4.3% significant yield advantage for the 1BL/1RS derivatives.…”

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confidence: 99%

“…germplasm, specifically for the cultivar Veery cross (Rajaram et al 1983, Villareal et al 1994). The Veery lines were derived from the 1BL/1RS winter bread wheat variety Kavkaz.…”

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confidence: 99%

“…Recently it was suggested (Villareal et al 1994) that 1BL/1RS wheat varieties exhibit a yield advantage over 1B wheat varieties. Further (Villareal et al 1995) in a two year yield trial study based upon random F2 derived F6 advanced lines from a Nacozari (1B)/Seri 82 (1BL/ 1RS) cross concluded that there was a 4.3% significant yield advantage for the 1BL/1RS derivatives.…”

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Homozygous 1B and 1BL/1RS Chromosome Substitutions in Triticum aestivum and T. turgidum cultivars.

1996

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The 1BL/1RS homozygous chromosome translocation involves the short arm of Secale cereale L. chromosome 1R (1RS) and the long arm of chromosome 1B (1BL) of Triticum aestivum L. The 1RS chromosome arm possesses leaf, stem, stripe rust and mildew resistance genes (McIntosh 1983, Zeller and Fuchs 1983, Heun and Fischbeck 1987. Presence of the rye arm has been further associated with high yield, stability and wide adaptability of wheat germplasm, specifically for the cultivar Veery cross (Rajaram et al. 1983, Villareal et al. 1994). The Veery lines were derived from the 1BL/1RS winter bread wheat variety Kavkaz. The translocation was simultaneously and independently identified in Veery "S" by Merker (1982) and Mujeeb-Kazi (1982). Global wheat varietal releases possessing the 1BL/1RS translocation currently occupy over five million hectares of cultivated area. Approximately 40.0% of our germplasm (Rajaram et al. 1990) and up to 85.0% of Pakistan wheat varieties in yield trials (Jahan et al. 1990, Ter-Kuile et al. 1991 possess the homozygous 1BL/1RS translocation.Recently it was suggested (Villareal et al. 1994) that 1BL/1RS wheat varieties exhibit a yield advantage over 1B wheat varieties. Further (Villareal et al. 1995) in a two year yield trial study based upon random F2 derived F6 advanced lines from a Nacozari (1B)/Seri 82 (1BL/ 1RS) cross concluded that there was a 4.3% significant yield advantage for the 1BL/1RS derivatives. We felt that a more stringent test was necessary and through this report describe the production of germplasm that shall more precisely elucidate the effects of the 1BL/1RS translocation in a bread and durum wheat variety. This was made possible by substituting in T. aestivum L. cv. Seri 82 (1BL/1RS, 1BL/1RS) a 1B chromosome, and a 1BL/1RS chromosome in T. turgidum L. cv. Altar 84 (1B, 1B) by using the backcross procedure. For critical testing of the 1BL effect on yield components the "extracted" Seri 82 and Altar 84 derivatives after eight backcrosses and a selfing were also selected. These "extracted" derivatives may differ from the original breeders Seri 82 and Altar 84 varieties by recombinational changes on the 1BL chromosome arm, a minor but significant feature not met by random F2 derived F6 germplasm also. The diagnostic biochemical, molecular and cytological procedures used in development of the substituted germplasm are also elucidated. Materials and methodsProduction and cytological diagnostics Triticum aestivum L. cv. Seri 82 (1BL/1RS, 1BL/1RS) as the female parent was pollinated by T. aestivum L. cv. Pavon 76 (1B, 1B). The resulting Seri 82 X Pavon 76 F1 (1BL/1RS, 1B) was backcrossed to Seri 82. BC1 plants were screened by C-or N-banding techniques (Jahan et al. 1990, Jewell andMujeeb-Kazi 1982) for identifying up to three 1BL/1RS, 1B heterozygote derivative plants which were then each backcrossed to Seri 82 again and similarly 1 Corresponding author: A . Mujeeb-Kazi.

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Characterization of PmBN418, a wheat powdery mildew resistance gene on the rye 1RS chromosome arm

Xu¹,

Bai

Li³

et al. 2021

Crop Science

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Powdery mildew, caused by Blumeria graminis f. sp. tritici (Bgt), is a disease of global importance, and new powdery mildew resistance genes that can be directly used in cultivar development are urgently needed. A recombinant inbred line population from ‘CI 17884’ × ‘Bainong 418’ was genotyped using single nucleotide polymorphism markers generated from genotyping‐by‐sequencing, and evaluated for responses to Great Plains Bgt isolates OKS(14)‐B‐3‐1 and NEI‐1‐3. Genetic mapping identified a powdery mildew resistance gene, designated PmBN418, on a 1BL.1RS translocation segment in Bainong 418. Given that PmBN418 conferred resistance to Bgt isolates virulent to Pm8 that resides on the chromosome arm 1RS translocated from rye (Secale cereale L.) cv. ‘Petkus’, PmBN418 is either a new gene or a new allele of Pm8. Phenotypic and genomic data analyses indicated segregation distortion of the powdery mildew resistance gene due to reduced transmission of the wheat (Triticum aestivum L.)–rye 1BL.1RS translocation segment from Bainong 418, while the wheat–Triticum speltoides translocation segment 7S#1 in CI 17884 was preferentially transmitted. Bainong 418, a high‐yielding cultivar with good resistance to several U.S. Bgt isolates, is a useful resistance source for wheat breeding, and the availability of the Kompetitive Allele Specific PCR (KASP) marker KASP‐1RS‐1 makes marker‐assisted introgression of PmBN418 into locally adapted cultivars feasible.

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Associated Effects of Chromosome 1B/1R Translocation on Agronomic Traits in Hexaploid Wheat.

Cited by 22 publications

References 9 publications

1RS translocation in Croatian winter wheat varieties

1RS translocation in Croatian winter wheat varieties

Homozygous 1B and 1BL/1RS Chromosome Substitutions in Triticum aestivum and T. turgidum cultivars.

Characterization of PmBN418, a wheat powdery mildew resistance gene on the rye 1RS chromosome arm

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