Hybrid incompatibilities in interspecific crosses between tetraploid wheat and its wild diploid relative Aegilops umbellulata

Plant Molecular Biology
Moeko OkadaShigeo Takumi

Abstract

Hybrid abnormalities, severe growth abortion and grass-clump dwarfism, were found in the tetraploid wheat/Aegilops umbellulata hybrids, and the gene expression changes were conserved in the hybrids with those in other wheat synthetic hexaploids. Aegilops umbellulata Zhuk., a diploid goatgrass species with a UU genome, has been utilized as a genetic resource for wheat breeding. Here, we examine the reproductive barriers between tetraploid wheat cultivar Langdon (Ldn) and various Ae. umbellulata accessions by conducting interspecific crossings. Through systematic cross experiments, three types of hybrid incompatibilities were found: seed production failure in crosses, hybrid growth abnormalities and sterility in the ABU hybrids. Hybrid incompatibilities were widely distributed over the entire range of the natural species, and in about 50% of the cross combinations between tetraploid Ldn and Ae. umbellulata accessions, ABU F1 hybrids showed one of two abnormal growth phenotypes: severe growth abortion (SGA) or grass-clump dwarfism. Expression of the shoot meristem maintenance-related and cell cycle-related genes was markedly repressed in crown tissues of hybrids showing SGA, suggesting dysfunction of mitotic cell division in the s...Continue Reading

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Citations

May 31, 2019·Frontiers in Plant Science·Masahiro Kishii
Sep 2, 2021·Journal of Plant Research·Kumpei ShiragakiTakahiro Tezuka

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Datasets Mentioned

BETA
GPL9805
GSE93943
GSE93969
GSM2465475
GSM2465478
GSM2465831
GSM2465834
GSE33357
GSE78784

Methods Mentioned

BETA
SGA
two hybrid
PCR
Feature Extraction

Software Mentioned

DnaSP
Blast2GO
MEGA
BLASTx
Feature Extraction
CLUSTAL W

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