I crossed two paphs and both pods took. One has germinated and am sowing the 2nd capsule next week. My question is how different will the progeny be from pollen a x pod b. And pollen b x pod a

Are there any diffs if the DNA comes from male or from female?

Joseph

hello.
yes, there will probably be some variation. But how much I think, will depend on the cross/species..

not the best answer, but it will give you a clue.. ;)

I agree with what newgrower said. There will always be some kind of variations.

I crossed two paphs and both pods took. One has germinated and am sowing the 2nd capsule next week. My question is how different will the progeny be from pollen a x pod b. And pollen b x pod a

Are there any diffs if the DNA comes from male or from female?

Joseph

In most plants that are diploids or tetraploids with normal pairing of chromosomes there is no difference between the chromosomes (and therefore chromosomal genes) passed on through pollen vs egg. But if a plant is a triploid or aneuploid or has chromosomes that don't pair quite normally because it is a hybrid from diverse parents then then there might be ways that pollen and eggs could tend to end up with different sets of genes. Maybe. These plants would also tend to have reduced fertility overall. The kinds of effects this might have would be specific to every case - no way to generalize.

There is another way that pollen and egg pass on different genes though, and it is true in all cases, with the same general kinds of differences possible in all cases. Mitochondria and chloroplasts have a few genes that are independent of the chromosomes. All mitochondria and chloroplasts come through the pod/egg parent thought, never from the pollen. This could account for differences in photosynthesis (light requirements), energy processing (general vigor), presence and distribution of green and yellow pigments, optimal temperature and other things, with at least subtle effects on plant size and shape too, depedning on whether a plant is used for pollen or to bear the seed pod. So if one parent is more vigorous and grows well under a range of conditions use it as the pod parent, and use the weaker growing or more difficult plant for the pollen, and the seedlings will have a better chance of taking after the easily grown parent.

Thanks! Very useful stuff! Will keep it in mind for future crosses. Momma always did give more than papa. Joseph:hyper:
:cool: