الفهرس 
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Abstract
INTRODUCTION
Producing varieties with high yielding abilities
has always been first and foremost among plant breeding
objectives. High yielding varieties, however, share with
all having things the susceptibility to environmental
factors which may vary from one location to another, or
from year to year. Today the plant breeder is not
satisfied by mere high yielding ability. He also demands
stability of high performance over a relatively wide range
of environmental conditions.
The present study is an attempt at evaluating stability
of a number of wheat varieties as well as explaining the
statistical procedures that can be of value in routine
breeding programmes of wheat as well as other field crops