Chromosome composition, stability and fertility of alloploids between Triticum turgidum var. carthlicum and Thinopyrum junceiforme

Ellneskog‐Staam, Pernilla; Merker, Arnulf

doi:10.1034/j.1601-5223.2002.1360109.x

Cited by 14 publications

(8 citation statements)

References 27 publications

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“…It is well known that most of the allopolyploids are not cytologically stable (ELL-NESKOG-STAAM & MERKER 2002); however, in this case, the improved meiotic index of the selected triticale progenies suggests that, in a newly created allopolyploid, those individuals with superior reproductive performance tend to reduce their meiotic irregularities. These results are coincident with those found by other authors, who observed that the meiotic disturbances in triticale can be overcome by selecting and crossing those phenotypes with a satisfactory grain production (ELLNESKOG-STAAM & MERKER 2002;ToRRES et al, 2002;MAicH & 0RD6~ 2003).…”

Section: Resultssupporting

confidence: 79%

Cytological microevolutive changes in hexaploid triticale (X Triticosecale Wittmack)

et al. 2006

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-The objectives of this study were to evaluate a) the success in meiosis of disruptivdy sdected triticale progenies used as recurrent selection parents, and b) the changes that took place in their meiotic behavior after three cycles of recurrent sdection in hexaploid triticale. From samples of five immature spikes per experimental unit, the meiotic index (MI) and the percentage of tetrads containing micronuclei in 1, 2, 3 or 4 microspores were estimated. The families used as recurrent selection parents showed a significandy higher MI than those with the lower agronomical performance. A positive and significant linear relation between the MI and cycles of recurrent sdection was observed. The analysis of the tetrads with micronuclei showed a non-significant positive tendency to increase the percentage of tetrads with micronuclei in 1 microspore in the more evolved cycle, while negative linear rdations between tetrads with micronuclei in 2, 3 and 4 microspores and cycles were observed. These results suggest that in triticale those individuals with superior reproductive performance tend to reduce their meiotic irregularities.

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Section: Resultssupporting

confidence: 79%

Cytological microevolutive changes in hexaploid triticale (X Triticosecale Wittmack)

et al. 2006

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“…Chromosome alteration in interspecific hybrids may also be brought about by modifications in gene expression due to parental genome interactions and/or different ploidy levels (Comai 2000). On the other hand, no translocation was detected in the counted F 3 plants in the present study while some was reported in BC 1 F 4 -BC 1 F 6 progenies of wheat and wheatgrasses in other different studies (Ellneskog-Staam andMerker 2002, Fedak andHan 2005). E b genome of Th.…”

Section: Discussioncontrasting

confidence: 72%

Cytogenetic analysis of hybrids derived from wheat and Tritipyrum using conventional staining and genomic in situ hybridization

Mirzaghaderi¹,

Karimzadeh²,

Hassani³

et al. 2010

Biol. plant.

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The new salt tolerant cereal, Tritipyrum (2n=6x=42, AABBE b E b ) offers potential to introduce desirable characters for wheat improvements. This study was aimed to generate a segregating population from Iranian local wheat cultivars (2n=6x=42, AABBDD) and Tritipyrum crosses, study of the meiotic behaviour in F 2 hybrids and identification of E b chromosomes in F 3 individuals. Results showed meiotic abnormalities in F 2 plants and different pairing frequency in the meiosis among F 2 plants. Genomic in situ hybridization revealed that total and E b chromosome number of F 3 seeds ranged from 39 to 45 and 0 to 10, respectively. A significant prevalence of hyper-aneuploidy was observed among F 3 genotypes. C-banding patterns identified E b chromosomes in Tritipyrum, indicating that it also can be useful to study wheat-Tritipyrum derivatives.

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“…Wheat-alien amphiploids, being stable and highly fertile, represent an important intermediate step in transferring agronomically useful genes into bread wheat (Jiang et al 1994;Fedak et al 2000;Ellneskog-Staam and Merker 2002;Fedak and Han 2005). Genomic in situ hybridization (GISH) is a powerful technique to visualize alien chromatin in wheatalien hybrids (Le et al 1989;Schwarzacher et al 1989;Ceoloni et al 1998;Molnár-Láng et al 2000), while the multicolour GISH (mcGISH) technique enables 3 or more genomes of a polyploid species to be detected simultaneously, providing a more detailed genome analysis (Mukai et al 1993;Cifuentes et al 2006;Jauhar and Peterson 2006).…”

Section: Introductionmentioning

confidence: 99%

Physical mapping of a 7A.7D translocation in the wheat–Thinopyrum ponticumpartial amphiploid BE-1 using multicolour genomic in situ hybridization and microsatellite marker analysis

Sepsi

Molnár

Molnár-Láng

2009

Genome

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The absence of chromosome 7D in the wheat-Thinopyrum ponticum partial amphiploid BE-1 was detected previously by multicolour genomic in situ hybridization, sequential FISH (fluorescence in situ hybridization) using repetitive DNA probes, and SSR marker analysis. In the present study the previous cytogenetic and SSR marker analyses were expanded to include 25 other SSR markers assigned to wheat chromosomes 7A and 7D to confirm the presence of a 7A.7D translocation and to specify its composition. An almost complete chromosome 7A and a short chromosome segment derived from the terminal region of 7DL were detected, confirming the presence of a terminal translocation involving the distal regions of 7AL and 7DL. In both cases the position of the translocation breakpoint was different from that of known deletion lines. The identification of the 7AL.7DL translocation and its breakpoint position provides a new physical landmark for future physical mapping studies, opening up the possibility of more precise localization of genes or molecular markers within the terminal regions of 7DL and 7AL.

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Chromosome composition, stability and fertility of alloploids between Triticum turgidum var. carthlicum and Thinopyrum junceiforme

Cited by 14 publications

References 27 publications

Cytological microevolutive changes in hexaploid triticale (X Triticosecale Wittmack)

Cytological microevolutive changes in hexaploid triticale (X Triticosecale Wittmack)

Cytogenetic analysis of hybrids derived from wheat and Tritipyrum using conventional staining and genomic in situ hybridization

Physical mapping of a 7A.7D translocation in the wheat–Thinopyrum ponticumpartial amphiploid BE-1 using multicolour genomic in situ hybridization and microsatellite marker analysis

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