From which plant were haploid plants first obtained through anther culture?

After the demonstration of totipotency,a botanist wishes to produce identical plants from an angiosperm by tissue culture. The parts or tissues which are likely to yield haploid embryos are:

What are the advantages of tissue culture methods over conventional methods of plant breeding in crop improvement programmes?

In crop improvement programmes,virus-free clones can be obtained through

How many types of plant tissue culture are there?

What is the undifferentiated mass of cells in tissue culture called?