Terminology

Cells of true haploid plants contain a single complete set of chromosomes. Their phenotype is the expression of a single copy of genetic information, with no masking of traits.
An often used term to refer to anther culture is androgenesis. Senso stricto both terms refer to the development from an anther. However, they are most often used in a more restricted sense to indicate the obtention of haploids or doubled haploids from these anthers.
When starting from a tetraploid the resulting "haploid" will have a double set of genetic information and is therefore called a dihaploid.
Before the first pollen grain mitosis takes place one speaks about a microspore, later on it is called a pollen grain.
Isogenic lines differ from each other by only one gene