Molecular cytogenetic identification and phenotypic description of a new synthetic amphiploid, Triticum timococcum (AtAtGGAmAm)
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Type = Article
Cím:
Molecular cytogenetic identification and phenotypic description of a new synthetic amphiploid, Triticum timococcum (AtAtGGAmAm)
Létrehozó:
Mikó, Péter
Megyeri, Mária
Farkas, András
Molnár, István
Molnár-Láng, Márta
Dátum:
2015
Téma:
Q1 Science (General) / természettudomány általában
QK Botany / növénytan
S1 Agriculture (General) / mezőgazdaság általában
SB Plant culture / növénytermesztés
Tartalmi leírás:
A recently developed synthetic amphiploid,
Triticum timococcum Kost., nom. nud.
(2n = 6x = 42, AtAtGGAmAm) is described in the
present study. This hexaploid taxon was developed by
colchicine treatment in Martonva´sa´r from the hybrid
of a selected accession of Triticum timopheevii Zhuk.
(2n = 4x = 28, AtAtGG) and a prebred semi-dwarf
line of Triticum monococcum L. (2n = 2x = 14,
AmAm). A detailed cytomolecular examination was
carried out using the sequential multicolour fluorescence
and genomic in situ hybridization techniques
(FISH and mcGISH). It was proved that T. timococcum
has 42 chromosomes originating from its parents.
The chromosomes of the A genomes of T. monococcum
and T. timopheevii could be distinguished in the
amphiploid using FISH. The successful discrimination
of the chromosomes was supported by the karyotypes
of the three genomes and the successful optimization
of the mcGISH technique for the A and G chromosomes
achieved in the present study. A phenotypic
evaluation was also carried out under natural and
artificial growing conditions in 2012 and 2013. Based
on the results, T. timococcum has intermediate characteristics
in terms of spike (spikelet) shape and plant
height, while it is similar to the female parent,
T. timopheevii regarding pubescence. Like its parents,
T. timococcum showed outstanding resistance to the
main fungal diseases of wheat. T. timococcum headed
later and developed longer and looser spikes, fewer
tillers and only a third as many seeds than its parents.
The third generation of T. timococcum was able to
develop an acceptable number of seeds, even taking
into account the reduced germination ability in the
field.
Típus:
Article
PeerReviewed
info:eu-repo/semantics/article
Formátum:
text
Azonosító:
Mikó, Péter and Megyeri, Mária and Farkas, András and Molnár, István and Molnár-Láng, Márta (2015) Molecular cytogenetic identification and phenotypic description of a new synthetic amphiploid, Triticum timococcum (AtAtGGAmAm). Genetic Resources and Crop Evolution, 62. pp. 55-66. ISSN 0925-9864
Kapcsolat:
245058-SOLIBAM