I assume the commercial strain of Rhode Islands would have come about when hatcheries decided what they had was a Rhode Island Red and dubbed it a commercial strain. But I could be wrong.
"Semi-autosexing" refers to anything that isn't a 100% autosexing breed. Welsummers are semi-autosexing...
Considering how popular Production Reds had become at that time, I'd like to think that they would know the difference between a Rhode Island Red and a Production Red. But since I don't have any genuine Rhode Islands here to test the theory I couldn't swear by it.
If you ever get the chance to...
Unfortunately I can't. I don't have the space to work with Rhode Island Reds or New Hampshires - as much as I might want to. Here is a quote about sexing them:
Rhode Island Red and New Hampshire: The presence of a white or light spot on the wing front of Rhode Island Red or New hampshire...
Eesh, there are tons that are - or were at one point - semi-autosexing.
True Rhode Island Reds could be sexed by wing color at around 90% accuracy, New Hampshire Reds using the same method at around 80% accuracy. Silver Grey Dorkings (also Silver Grey Leghorns and, I believe, Silver Phoenix)...
I think Greenfire has Legbars right now.
I'm interested in the semi-autosexing breeds/colors: Barred Rocks, Silver Grey Dorkings, Norwegian Jaerhons, etc. I place a big emphasis on autosexing abilities in chicks. Some strains of semi-autosexing breeds are 93-95% accurate, with many of them in...