Studies on the variability and combining ability of waterlogging tolerance in common wheat

Abstract

An experiment was conducted to evaluate waterlogging tolerance of 10 wheat varieties and their F 1s from a Griffing 4 dialle cross,with the number of green leaves per main stem under 25 days artificial flooding treatment at the booting stage as a criterion.Results showed that there was asignificant difference in waterlogging tolerance among varieties,with Compton being the most tolerant and Ningmai 3 the most sensitive.Ten parents were divided into 4 groups based on their effect values of general combining ability and variance of special combining ability.Compton and Xifeng showed a great potential value for utilization whereas Ningmai 3 had little usefulness in waterlogging tolerance.The dominant potential of waterlogging tolerance was about 0.5 and heritability was 71.5%.Therefore,it is possible to improve waterlogging tolerance in wheat bya ppropriate choosing parents and selecting superior plants in early generations.