Abstract
I examined the genetic basis of different egg and clutch sizes in two populations of the freshwater prawn Macrobrachium nipponense inhabiting a single water system, by reciprocal crossings in the laboratory. The male and female intercrossed without any obstacle and produced viable F 1 hybrids. The hybrids exhibited intermediate phenotype of egg and clutch sizes between the parental values, suggesting that these reproductive traits are controlled by a quantitative genetic system. The genetic control on egg size seemed to be strict, while that on clutch size was weak. Since viability and fertility did not decline in the F 1 hybrids, it is unlikely that these post-mating factors operate as the major cause of reproductive isolation between the two groups of individuals in the field
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
