Re: HYB: diploid x non diploid.

christian foster <flatnflashy@yahoo.com> wrote:
  ..........
If one parent is a known diploid and the other is presumed non-diploid, does that mean the resulting seedling is at best triploid?

Does that mean my seedling will be sterile, for all intents and purposes?

Christian 

  When the teetraploid TB species were first introduced, a lot of their hybrids with diploids were tetraploids.  No one knows the percentage of these tetraploid offspring.  So many were trying to get crosses.  No doubt many more sterile triploids were produced.
  But in crosses between diploids and tetraploids in iris, it does appear that there is a greater chance of an unreduced gamete from the diploid making a seed than in diploid x diploid.
  Supose you do have a triploid, which is a possiblity.  Some of them do make seeds, or pollen for that matter.  But it is the rule that they are sterile.  Even those that are found to be somewhat fertile will generally seldom set seeds, and those will usually be one lonely seed in one lonely pod.
  It is useful to know the ploidy of iris, or any plants, before making crosses.  
  Walter

 
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