Heterosis

StrongPlant · July 12, 2017

When it comes to genetics heterosis phenomenon is the one I've probably read the most about.And it's still not completely clear why it occurs.
I've seen it in action in tomatoes,but I noticed one interesting thing.
I made 3 crosses,the same strain of s.pimpinellifolium with 3 different s.esculentum varieties.Thing is,the cross with esculentum parent which was the most inferior in terms of yeld and vegetative growth gave the most vigorous and high yielding F1 out of the 3.Why would this be?
To me it made sense that if 2 parents are both superior genetically,that would make a better F1 then if one of the parents is inferior.

July 12, 2017	#1
StrongPlant Tomatovillian™ Join Date: Jun 2016 Location: Europe/Serbia-Belgrade Posts: 151	Heterosis When it comes to genetics heterosis phenomenon is the one I've probably read the most about.And it's still not completely clear why it occurs. I've seen it in action in tomatoes,but I noticed one interesting thing. I made 3 crosses,the same strain of s.pimpinellifolium with 3 different s.esculentum varieties.Thing is,the cross with esculentum parent which was the most inferior in terms of yeld and vegetative growth gave the most vigorous and high yielding F1 out of the 3.Why would this be? To me it made sense that if 2 parents are both superior genetically,that would make a better F1 then if one of the parents is inferior.