Chromosome and genome composition of a Triticum × Thinopyrum hybrid by classical and molecular cytogenetic techniques

Fradkin, Maia; Ferrari, María Rosa; Ferreira, Víctor; Grassi, Ezequiel; Greizerstein, Eduardo José; Poggio, Lidia

doi:10.1007/s10722-011-9679-4

Cited by 9 publications

(4 citation statements)

References 44 publications

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“…In previous studies, we have found that SH16 INTA is hexaploid, with 2n=42 chromosomes, 14 of which belong to the J genome of Thinopyrum and 28 to wheat genomes. We also found that 14 of the latter belong to genome B, 4 to genome D (chromosome pairs 2D and 4D) and the remaining ones probably to genome A (Fradkin et al, 2011).…”

supporting

confidence: 51%

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Caracterización del genoma de un Triticum x Thinopyrum (Poaceae) sintético amfiploide utilizando hibridación in situ.

Fradkin¹,

Greizerstein²,

Ferrari

et al. 2014

Bol. Soc. Argent. Bot.

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Caracterización del genoma de un Triticum x Thinopyrum (Poaceae) sintético amfiploide utilizando hibridación in situ. Los “Trigopiros” derivan de cruzamientos entre diferentes especies deTriticum y Thinopyrum. El objetivo es obtener cereales con características similares al trigo, perennes,resistentes a enfermedades y a la salinidad de los suelos. Además estos híbridos sintéticos son útilespara transferir al trigo atributos agronómicos de Thinopyrum. “Trigopiro” Don Noé INTA, que se cultiva actualmente en Argentina, presenta rasgos agronómicos valiosos, así como un alto contenido deproteínas seminales. En el presente trabajo se confirmó que el número de cromosomas de “Trigopiro”Don Noé es 2n = 56. Técnicas de hibridación in situ (FISH-GISH) permitieron postular su composicióngenómica desconocida hasta el momento. Este híbrido artificial posee 14 cromosomas del genoma J deThinopyrum y 2 pares de cromosomas con posibles translocaciones entre Triticum y Thinopyrum. El restode los cromosomas pertenecen a los genomas A, B y D de Triticum.

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supporting

confidence: 51%

“…The cytogenetical results obtained in "trigopiro" Don Noé INTA showed important differences from those obtained in "trigopiro" SH16 INTA (Fradkin et al, 2011). Both hybrids currently used in breeding programs, present different levels of ploidy and different chromosome and genome composition.…”

Section: Resultsmentioning

confidence: 78%

Caracterización del genoma de un Triticum x Thinopyrum (Poaceae) sintético amfiploide utilizando hibridación in situ.

Fradkin¹,

Greizerstein²,

Ferrari

et al. 2014

Bol. Soc. Argent. Bot.

Self Cite

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“…Recombination of homoeologues also adds layers of genetic complication during the formation of amphidiploids, as the additional genome or genomes can be hybrids of the parental Thinopyrum genomes (Fedak and Han, 2005). There are several examples of lines stable at 42 chromosomes where a portion of the T. aestivum complement has been substituted with Thinopyrum chromosomes (Fradkin et al, 2011;Burešová et al, 2014). These lines are stable in meiosis but have not been evaluated for perennial habit.…”

Section: Hybrid Genomesmentioning

confidence: 99%

Breeding Perennial Grain Crops Based on Wheat

Curwen-McAdams

Jones

2017

Crop Science

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Wild relatives offer a diversity of traits potentially useful in crop improvement. Identification of major genes for resistance to biotic and abiotic stresses, in conjunction with targeted introgression, has introduced some of these traits into cultivated varieties. The difficulty of transferring complex traits, and associated linkage drag, has limited the ability of breeding programs to fully use important genetic variation. Wheat (Triticum L.) is an example of an important crop with large secondary and tertiary genepools of species capable of producing viable offspring by cross pollination. Wheat is annual, but most of the related species in the Triticeae Dumort tribe are perennials. An unknown number of genes control the perennial habit, although previous work has shown that it is a complex trait with quantitative expression. Lack of recombination between the parental genomes and complexity of the trait suggest another avenue for breeding: the addition of a genome. Multiple genera can hybridize with wheat, and some combinations produce stable amphiploids. The development of perennial grain and forage crops balancing the agronomics of wheat with the polycarpic habit of its relatives is promising. The approach is similar to Triticale (× Triticosecale Wittmack ex A. Camus), where new crops are developed combining the desirable qualities of the parents. Through prebreeding of the wild relatives, application of insight into meiosis, and strategic use of known genes, it should be more efficient to breed perennial grain crops adapted to diverse production systems.

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“…Processing quality can also be obtained from the decaploid A. elongatum [Liu et al, 2008]. Attempts were made to transfer traits such as perennial growth habit, winter hardiness, tillering, vigorous root development, and tolerance to salinity, drought, and disease from wheatgrass to cultivated wheat [White, 1940;Fradkin et al, 2012].…”

mentioning

confidence: 99%

Production and Molecular Cytogenetic Characterization of a Durum Wheat-<b><i>Thinopyrum elongatum</i></b> 7E Disomic Addition Line with Resistance to Fusarium Head Blight

Liu

Dai²,

Chi³

et al. 2017

Cytogenet Genome Res

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Wheatgrass, Thinopyrum elongatum (2n = 2x = 14, EE), is an important wild relative of wheat with many excellent traits, including resistance to Fusarium head blight (FHB), that can be used for durum wheat improvement. Through hybridization of the durum cultivar “Langdon” with the amphiploid 8801 (AABBEE), a disomic alien addition line (2n = 30) with a pair of Th. elongatum 7E chromosomes was obtained and confirmed using chromosome-specific molecular markers of Th. elongatum and genomic in situ hybridization (GISH). This line is meiotically and reproductively stable, generally forming 15 bivalents at meiosis including 14 pairs from Langdon and 1 from Th. elongatum with 2 chiasmata each as revealed by GISH analysis. At the adult growth stages under field conditions, this addition line shows high resistance to FHB, with less than 16% infection on visual observation in 2 years (2014 and 2015). This addition line is shorter in height and has narrower leaves and shorter spikes as compared to its parent Langdon. So the linkage group 7E might be a further source of wheat improvement by targeted introgression approaches.

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Chromosome and genome composition of a Triticum × Thinopyrum hybrid by classical and molecular cytogenetic techniques

Cited by 9 publications

References 44 publications

Caracterización del genoma de un Triticum x Thinopyrum (Poaceae) sintético amfiploide utilizando hibridación in situ.

Caracterización del genoma de un Triticum x Thinopyrum (Poaceae) sintético amfiploide utilizando hibridación in situ.

Breeding Perennial Grain Crops Based on Wheat

Production and Molecular Cytogenetic Characterization of a Durum Wheat-<b><i>Thinopyrum elongatum</i></b> 7E Disomic Addition Line with Resistance to Fusarium Head Blight

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