INTRODUCTION TO PLANT BREEDING

AGRONOMY 815 / CLASS ASSIGNMENTS


P. STEPHEN BAENZIGER, 338 Keim Hall, 472-1538

DEPARTMENT OF AGRONOMY / UNIVERSITY OF NEBRASKA



PROBLEM SET 2Due September 18, 1997


Name: ________________________________________________________________________




1. You have made the following cross:

AABBCCxaabbcc
Red White

F1: AaBbCc
Red

F2:63 Red : 1 White


What are the genotypes that give you the red color? What genotype(s) give you the white color?






2. In the F3 of the above cross, assuming no selection, what will be the ratio of red to white plants?





3. In the F6 of the above cross, assuming no selection, what will be the ratio of red to white plants?





What is the proportion of completely homozygous lines in the F6 for plant color?







Of the completely homozygous lines, what are the proportion of red plants and the proportion of white plants?