Production of intervarietal substitution lines with improved interspecific crossability in the wheat cv Courtot

Bernard, Michel

doi:10.1051/agro:19940103

Cited by 8 publications

(6 citation statements)

References 13 publications

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“…To evaluate their usefulness in such applications, BC2 lines produced from wheat elite varieties that serve as parents in primary triticale production were tested with the two markers. The BC2 panel consisted of 11 crossable progenies resulting from six noncrossable elite wheat varieties that had been crossed with Ct(FK 5B), a crossable substitution line carrying a chromosome 5B originating from the Japanese wheat accession FukuhoKomugi (FK) (Gay and Bernard 1994) (Figure 6). The results indicate complete association between the two SSR markers and crossability with rye except for one individual (01BB15-2-1 in Oratorio 3 Ct(FK 5B) that showed recombination between cfb306 and crossability (Figure 6) and no polymorphism for cfb341.…”

Section: Resultsmentioning

confidence: 99%

“…The markers were tested on 11 lines originating from backcrosses between six noncrossable breeding varieties (Genesis, Balthazar, Oratorio, Altria, FD92017, and Ornicar) and the substitution line Ct(FukuhoKomugi 5B) referred to hereafter as Ct(FK 5B). In this latter line, chromosome 5B of the noncrossable Ct has been replaced by the 5B chromosome of the crossable Japanese cultivar FukuhoKomugi (FK) (Gay and Bernard 1994). Two backcrosses were carried out with a self-fertilization generation between each backcross.…”

Section: Methodsmentioning

confidence: 99%

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Fine Mapping and Marker Development for the Crossability Gene SKr on Chromosome 5BS of Hexaploid Wheat (Triticum aestivum L.)

et al. 2009

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Most elite wheat varieties cannot be crossed with related species thereby restricting greatly the germplasm that can be used for alien introgression in breeding programs. Inhibition to crossability is controlled genetically and a number of QTL have been identified to date, including the major gene Kr1 on 5BL and SKr, a strong QTL affecting crossability between wheat and rye on chromosome 5BS. In this study, we used a recombinant SSD population originating from a cross between the poorly crossable cultivar Courtot (Ct) and the crossable line MP98 to characterize the major dominant effect of SKr and map the gene at the distal end of the chromosome near the 5B homeologous GSP locus. Colinearity with barley and rice was used to saturate the SKr region with new markers and establish orthologous relationships with a 54-kb region on rice chromosome 12. In total, five markers were mapped within a genetic interval of 0.3 cM and 400 kb of BAC contigs were established on both sides of the gene to lay the foundation for map-based cloning of SKr. Two SSR markers completely linked to SKr were used to evaluate a collection of crossable wheat progenies originating from primary triticale breeding programs. The results confirm the major effect of SKr on crossability and the usefulness of the two markers for the efficient introgression of crossability in elite wheat varieties.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Fine Mapping and Marker Development for the Crossability Gene SKr on Chromosome 5BS of Hexaploid Wheat (Triticum aestivum L.)

et al. 2009

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“…1987, Gay andBernard, 1994), but has the advantage that in most cases it is not the full 5B chromosome of the crossable variety which is replaced, as recombinations may occur between the 5B chromosome of the cultivated variety and that of Chinese Spring during the process . The other point is that different kr alleles can be transferred simultaneously, as the selection is carried out according to the seed set achieved with rye .…”

Section: Discussionmentioning

confidence: 99%

Transfer of the recessive crossability allele kr1 from Chinese Spring into the winter wheat variety Martonvásári 9

1996

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The recessive of crossability allele krl was transferred from the spring wheat variety Chinese Spring (CS) into the winter wheat variety Martonvasari 9 (Mv9) by backcrossing the Mv9 x CS hybrids with Mv9 . The Mv9 variety possesses dominant Krl alleles and is heterogeneous at the kr2 locus, so that some individual plants carry recessive kr2 alleles. The selection of plants possessing the recessive kr alleles from the (Mv9 x CS)Mv9 BC, generation was carried out according to the seed set achieved when pollinated with rye (Secale cereale L . cv. Mercator) . The partial dominance of the Kr alleles made it possible to differentiate between plants heterozygous at the Krl locus and KrIKrI homozygous dominant plants . Two selfed consecutive progenies were tested by pollination with rye to select the homozygous recessive krl krl kr2kr2 plants and to check the result of the selection after each backcross .As a result of three backcrosses with Mv9 and two selfings after each backcross the selected progenies had 61 .6% seed set with rye tested on sixty individual plants . These data confirm that after the third backcross the selected Mv9 krl line carries necessive crossability alleles KrI and Kr2, but the genotype is 93 .75% Mv9 .

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“…The recessive kr alleles are mostly present in wheat varieties from China, Japan, Siberia and other Asiatic regions, but these varieties are not suitable for production under Central European conditions. Snape et al (1987) and Gay and Bernard (1994) transferred the recessive kr1 allele into English and French varieties, respectively, by first incorporating the 5B chromosome from Chinese Spring or Fukuhokomugi into monosomic lines of these varieties. The major gene Kr1 was identified on 5BL, and SKr, a strong QTL affecting crossability between wheat and rye, on chromosome 5BS (Tixier et al 1998).…”

Section: Wheat × Rye Crossabilitymentioning

confidence: 99%

Production and Molecular Cytogenetic Identification of Wheat-Alien Hybrids and Introgression Lines

Molnár-Láng

Molnár

Szakács

et al. 2013

Genomics of Plant Genetic Resources

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Production of intervarietal substitution lines with improved interspecific crossability in the wheat cv Courtot

Cited by 8 publications

References 13 publications

Fine Mapping and Marker Development for the Crossability Gene SKr on Chromosome 5BS of Hexaploid Wheat (Triticum aestivum L.)

Fine Mapping and Marker Development for the Crossability Gene SKr on Chromosome 5BS of Hexaploid Wheat (Triticum aestivum L.)

Transfer of the recessive crossability allele kr1 from Chinese Spring into the winter wheat variety Martonvásári 9

Production and Molecular Cytogenetic Identification of Wheat-Alien Hybrids and Introgression Lines

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