Unlocking the Genetic Diversity and Population Structure of a Wild Gene Source of Wheat, Aegilops biuncialis Vis., and Its Relationship With the Heading Time

Frontiers in Plant Science

László Ivanizs¹  István Monostori¹  Eszter Gaál¹  Andrea Lenykó-Thegze¹  Tibor Kiss¹  Éva Szakács¹  András Farkas¹  Péter Mikó¹  Mária Megyeri¹  Edina Türkösi¹  Éva Darkó¹  Kitti Szőke-Pázsi¹  István Molnár²  Andrzej Kilian³ 

[1] Agricultural Institute, Centre for Agricultural Research, Martonvásár, Hungary;Institute of Experimental Botany, Center of the Region Haná for Biotechnological and Agricultural Research, Olomouc, Czechia;University of Canberra, Diversity Array Technologies, Canberra, ACT, Australia;

关键词: Aegilops biuncialis;    genetic diversity;    DArTseq markers;    population structure;    hierarchical clustering;    heading time;   

DOI  :  10.3389/fpls.2019.01531

来源: DOAJ

【 摘 要 】

Understanding the genetic diversity of Aegilops biuncialis, a valuable source of agronomical useful genes, may significantly facilitate the introgression breeding of wheat. The genetic diversity and population structure of 86 Ae. biuncialis genotypes were investigated by 32700 DArT markers with the simultaneous application of three statistical methods— neighbor-joining clustering, Principal Coordinate Analysis, and the Bayesian approach to classification. The collection of Ae. biuncialis accessions was divided into five groups that correlated well with their eco-geographic habitat: A (North Africa), B (mainly from Balkans), C (Kosovo and Near East), D (Turkey, Crimea, and Peloponnese), and E (Azerbaijan and the Levant region). The diversity between the Ae. biuncialis accessions for a phenological trait (heading time), which is of decisive importance in the adaptation of plants to different eco-geographical environments, was studied over 3 years. A comparison of the intraspecific variation in the heading time trait by means of analysis of variance and principal component analysis revealed four phenotypic categories showing association with the genetic structure and geographic distribution, except for minor differences. The detailed exploration of genetic and phenologic divergence provides an insight into the adaptation capacity of Ae. biuncialis, identifying promising genotypes that could be utilized for wheat improvement.

【 授权许可】

Unknown