[Natural high]

It is theoretically possible to reverse a male plant using ethephon or similar in order to make female pistils. Has anyone done this or seen an instance where it has been done?

If you then cross the reversed male with itself it will, in theory, make seeds in which are 50% true male XY, 25% true female XX, and 25% YY. If the YY embryos fail to develop then the ratio will be two thirds male, one third female.

The S1 seeds could then be grown out and a choice female identified, which could then be backcrossed with the father or crossed with a sibling male to make regular seeds.

I am interested to know if this has ever been done? I believe it would be a fantastic way to make a seed line from an elite male clone.



.

[bestothebest]

I think this can be done, but the trick is to have a known great male. Otherwise it is just a shot in the dark.

[Natural high]

Yeah an old school NL or Haze male would be ideal. I think I will try it to satisfy myself that it will work. I am particularly interested to know the ratio of males v females in the offspring. 75% male germination would indicate that the YY males can successfully develop beyond the gamete/embryo stage.

[Yard dog]

Chimera I think had male lines. might of been in the SamS thread on transforming males. (don't know if he did any reg breeding with them)

[Guy Brush]

Is this YY thingy approved? Never thought it would be possible. My own question is: Has anybody ever made several back crosses to a male plant, only to see what female expressions occur?

[MJPassion]

I remember that there is at least one breeder (can't remember who) that was doing some bx's to a male. I'm thinking it may have been the Rev from KOS Seeds but can't be sure. It was while I was perusing the forum he handles that I first heard about it. (Recurrent male parent)

[Natural high]

Originally Posted by Guy Brush

Is this YY thingy approved? Never thought it would be possible.

I doubt YY is viable but I'm keen to find out.

Originally Posted by Guy Brush

My own question is: Has anybody ever made several back crosses to a male plant, only to see what female expressions occur?

After an initial male selfing, there will be regular male and female seed so back crosses or S2's are possible via a simple pollination.

[Natural high]

Originally Posted by Yard dog

Nevil
Breeder
Join Date: Aug 2010
Posts: 1,125



Just a few thoughts on feminised seed.

I've used fruiting hormones on HzC male to get it to produce female flowers. HzC squared. We still have some of these old seeds. They produced real males and real females.

Originally Posted by Yard dog

Nevil
Breeder
Join Date: Aug 2010
Posts: 1,125



Hi Brock 1
Ethylene (fruiting hormone) is what I used to turn Haze C male into a female. I remember plucking calyxes of the plant to smoke it for the first time. An enlightening experience.

Originally Posted by Yard dog

Nevil
Breeder
Join Date: Aug 2010
Posts: 1,125



If I remember correctly, The NL5Hz was my most expensive line. I don't recall putting out pure haze. If anyone got any off me, it would have been HzBC. This was not as good as the Hz hybrids.
N.

Great info and it shows that it has done successfully.

[djimb]

I do believe Sam talked about having made seeds from a reversed male in his thread, though I can't point to a specific post. I tried this myself with a few males that grew from seed brought back from Colombia. Only three of 12 germinated, none were female, and I really wanted to preserve the line. Unfortunately, I either started the treatment too late, or my ethephon was old (I bought it at a local nursery and it looked like it had been on the shelf for years). I was keeping them in small pots and they only developed a few pistils before they died from being too rootbound.

If you attempt it, I'd love to follow along. I don't think anyone ever germinated seed from a selfed male on the other thread, and I'd be really curious to find out if YY embryos would even develop into seeds. It could also be a great tool for judging males for selection.

[Natural high]

Originally Posted by djimb

I do believe Sam talked about having made seeds from a reversed male in his thread, though I can't point to a specific post. I tried this myself with a few males that grew from seed brought back from Colombia. Only three of 12 germinated, none were female, and I really wanted to preserve the line.

If you attempt it, I'd love to follow along. I don't think anyone ever germinated seed from a selfed male on the other thread, and I'd be really curious to find out if YY embryos would even develop into seeds. It could also be a great tool for judging males for selection.

Thanks for the link to the other thread. Somehow I missed that but there is some good information on the actual technique of reversal. When I attempt it myself i will definitely post the progress and results here.

This technique would be very useful if you had a small number of regular seeds of a desirable strain and they all turned out to be males. Just reverse the males, cross them with themselves and/or each other, and harvest the seeds which will be either 25% or 33% female, depending on the viability of the YY.