Production and phenotypic characterization of nascent synthetic decaploids derived from interspecific crosses between a
- PDF / 2,107,145 Bytes
- 13 Pages / 547.087 x 737.008 pts Page_size
- 22 Downloads / 146 Views
(0123456789().,-volV) (0123456789().,-volV)
RESEARCH ARTICLE
Production and phenotypic characterization of nascent synthetic decaploids derived from interspecific crosses between a durum wheat cultivar and hexaploid Aegilops species Shigeo Takumi
. Sayaka Tanaka . Kentaro Yoshida . Tatsuya M. Ikeda
Received: 12 February 2020 / Accepted: 21 April 2020 Ó Springer Nature B.V. 2020
Abstract Wheat and its relatives include some allopolyploid species such as Aegilops juvenalis (Thell.) Eig (DDMMUU) and Aegilops vavilovii (Zhuk.) Chenn. (DDMMSS). Here, we successfully produced for the first time three allodecaploid lines with the AABBDDMMUU and AABBDDMMSS genomes through interspecific crosses between a tetraploid wheat cultivar and the two Aegilops species. Spike architecture of the synthetic lines showing a brittle rachis phenotype strongly resembled that of the parental hexaploid Aegilops species, but not that of the parental tetraploid wheat. Phenotypic differences of the spike and spikelet morphology were caused by one of the parental Aegilops species. Glumes of the synthetic decaploids were extremely hard, and all three synthetic lines had a soft texture with a smooth starch surface in endosperm cells. The soft-textured grains of the synthetic decaploids were due to accumulation of the puroindoline proteins derived from the genomes of parental allohexaploid Aegilops species. Therefore, the nascent synthetic decaploid
S. Takumi (&) S. Tanaka K. Yoshida Graduate School of Agricultural Science, Kobe University, Rokkodai 1-1, Nada, Kobe 657-8501, Japan e-mail: [email protected] T. M. Ikeda Western Region Agricultural Research Center, National Agriculture and Food Research Organization, Nishifukatsu 6-12-1, Fukuyama, Hiroshima 721-8514, Japan
lines highly reflect the phenotypic characteristics of the pollen parents. With further wheat breeding, the synthetic decaploids could have great potential to improve various traits. Keywords Allopolyploidization Grain texture Morphological variation Species differentiation Wheat
Introduction Common wheat (Triticum aestivum L.) is an allohexaploid species with the AABBDD genome that originated from interspecific crossing of cultivated tetraploid wheat (Triticum turgidum L.; AABB genome) with the pollen of D-genome donor species Aegilops tauschii Coss. (Matsuoka 2011; Dvorak et al. 2012). Wheat and its relatives include many allotetraploid and allohexaploid species (Zohary and Feldman 1962). Allopolyploid wheat relatives Aegilops juvenalis (Thell.) Eig and Aegilops vavilovii (Zhuk.) Chenn. respectively contain the DDMMUU and DDMMSS genomes. Designation and origins of the M subgenomes, alternatively represents as the X genomes, are still under discussion (Edet et al. 2018; Abdolmalaki et al. 2019). These species are dispersed in Central Asia and the northern part of the Fertile Crescent (Cabi and Dogan 2009; Cabi et al. 2010), and
123
Genet Resour Crop Evol
their accessions conserved ex situ are quite limited (Maxted et al. 2008). The two allohexaploid species
Data Loading...
