Quantitative trait locus analysis for spikelet shape-related traits in wild wheat progenitor Aegilops tauschii: Implications for intraspecific diversification and subspecies differentiation.

Wild diploid wheat Aegilops tauschii, the D-genome progenitor of common wheat, carries large genetic variation in spikelet and grain morphology. Two differentiated subspecies of Ae. tauschii, subspecies tauschii and strangulata, have been traditionally defined based on differences in spikelet morphology.

Characterization of three VERNALIZATION INSENSITIVE3-like (VIL) homologs in wild wheat, Aegilops tauschii Coss.

Control of flowering time is an adaptive trait of plants for different growth habitats. A vernalization requirement is a major genetic component determining wheat flowering time. Arabidopsis VERNALIZATION INSENSITIVE3 (VIN3) and VIN3-like 1 (VIL1) play critical roles in the vernalization pathway of flowering, and three wheat VIL homologs are upregulated by vernalization in einkorn wheat.

Dysfunction of mitotic cell division at shoot apices triggered severe growth abortion in interspecific hybrids between tetraploid wheat and Aegilops tauschii.

Common wheat is an allohexaploid species, derived through endoreduplication of an interspecific triploid hybrid produced from a cross between cultivated tetraploid wheat and the wild diploid relative Aegilops tauschii. Hybrid incompatibilities, including hybrid necrosis, have been observed in triploid wheat hybrids. A limited number of A.

Characterization of wheat Bell1-type homeobox genes in floral organs of alloplasmic lines with Aegilops crassa cytoplasm.

Background: Alloplasmic wheat lines with Aegilops crassa cytoplasm often show homeotic conversion of stamens into pistils under long-day conditions. In the pistillody-exhibiting florets, an ectopic ovule is formed within the transformed stamens, and female sterility is also observed because of abnormal integument development.

Results: In this study, four wheat Bell1-like homeobox (BLH) genes were isolated and named WBLH1 to WBLH4.

Altered expression of wheat AINTEGUMENTA homolog, WANT-1, in pistil and pistil-like transformed stamen of an alloplasmic line with Aegilops crassa cytoplasm.

Homeotic transformation of stamens into pistil-like structures, called pistillody, has been reported in some alloplasmic common wheat lines with Aegilops crassa cytoplasm. An alloplasmic line of Chinese Spring ditelosomic 7BS (CSdt7BS) with Ae. crassa cytoplasm lacking the long arm of the chromosome 7B shows pistillody, and the pistils and transformed stamens are sterile due to abnormal ovule development.