The F1 females are some times sterile but not always. The F1 males are 100% fertile. The F1 is called Ayam Bekisar.Aren't the hybrids sterile? Or is that a different color?
I made a special thread about this, someone made a book on this but it's in Javanese/Indonesian
Here is the thread.
Crossbreeding/Backcrossing of Green Junglefowl With Domestic Chicken and Successive Offspring
https://www.backyardchickens.com/th...tic-chicken-and-successive-offspring.1504385/
Some of the pictures on the thread.
The crossbreeding plan.
You will find many videos on how to produce F1 Bekisar or Backcross to Green JF called Ayam Bekilus(3/4 GJF), but all of those are in Indonesia.
Ayam Hutan Hijau = Green Jungle Fowl
Ayama Bekisar = F1 cross
Ayam Bekilus = Backcross to GJF
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