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Characterization of Triticum timopheevii Zhuk. gene bank accessions for the development of synthetic amphiploid wheat lines

Mikó, Péter and Megyeri, Mária and Lángné Molnár, Márta and Kovács, Géza (2013) Characterization of Triticum timopheevii Zhuk. gene bank accessions for the development of synthetic amphiploid wheat lines. ACTA AGRONOMICA HUNGARICA, 61 (2). pp. 113-121. ISSN 0238-0161

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Abstract

In recent years 56 accessions of Triticum timopheevii Zhuk. (2n=4x=28, AtAtGG) were characterized for the main phenotypic and resistance characters. Among these accessions 38 originated from the base species together with subspecies and varietas forms thereof, and 18 belong to the subspecies armeniacum group. After the evaluation of field assessment data gathered over 12 years, the most promising 11 accessions were selected for a crossability trial with cultivated einkorn. As a result of this trial, the accession with the highest seed set (Acc. No.: MVGB845) was chosen for the development of a new synthetic amphiploid using the same semi-dwarf line of diploid cultivated einkorn (Triticum monococcum L. ssp. monococcum 1T-1, 2n=2x=14, AmAm) as in the crossability trial. This einkorn line was bred in Martonvásár, and has both outstanding resistance and other promising phenotypic and agronomic characters.After crossing the accession MVGB845 with 1T-1, the triploid hybrids were treated with colchicine to obtain fertile progenies with a doubled genome. The newly developed synthetic hexaploid wheat breeding stock (named Triticum timococcum Kost., 2n=6x=42, AtAtGGAmAm) could ease the introgression of valuable resistance genes into bread wheat at the hexaploid level (bridge-crossing).The aim of the present research was to redevelop Triticum timococcum based on a detailed characterization of gene bank accessions, and to introduce this new material into wheat breeding.

Item Type: Article
Uncontrolled Keywords: Triticum timopheevii Zhuk.; Triticum monococcum L.; Synthetic amphiploid; Prebreeding; INTERSPECIFIC HYBRIDIZATION; characterization
Subjects: Q Science / természettudomány > QK Botany / növénytan
SWORD Depositor: MTMT SWORD
Depositing User: MTMT SWORD
Date Deposited: 05 Dec 2013 14:11
Last Modified: 05 Dec 2013 14:35
URI: http://real.mtak.hu/id/eprint/7783

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