Effect of Dicamba on Wheat Haploid Embryo Development
An interspecies zygote derives after wheat × maize crosses. This zygote aborts in absence of auxin stimulation. Treatment with dicamba is widely used to promote wheat haploid embryo development. We analyzed the effect of dicamba on wheat haploid embryo development. Four treatments related to the time of dicamba treatment were carried out: 1 day before pollination and 1, 5 and 9 days after pollination. It was concluded that wheat haploid embryos developed only in spikes treated with dicamba one or five days after pollination with maize. Dicamba treatment of wheat spikes prior to pollination hinders zygote formation and embryo development. Dicamba treatment 9 days after pollination is too late because young embryos have already aborted.
Keywordsdicamba embryo haploid wheat × maize
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