PART- II
ROLE OF THE ENVIRONMENT IN PLANT BREEDING
Environment affects selection and
progress from selection. The genetic gain or response to
selection is the difference between the
mean phenotypic value of selected offspring from parental population and that
of the parental population before selection. Response to selection is used to
compare selection methods and to predict environment...
INTRODUCTION TO QUANTITATIVE GENETICS Part - 1
PART- I
In the body of any organism there are two
types of characters i.e. qualitative and quantitative .The characters which are
governed by one or few genes are called oligogenic
or qualitative character and those which are
governed by numerous genes are called polygenic
or quantitative characte...
Effect of chemical mutagens
Effect of chemical mutagens
Chemical mutagens affect the organisms at molecular
level. Action of chemical mutagens may or may not give beneficial result. It
can change the sequence of nucleotides or may replace the nitrogenous bases in
DNA. On the basis of effect of chemical mutagens (at molecular level), it is
classified into following categories. We have to understand the molecular basis
of...