Correlation between gliadin bands.

Starch gel electrophoresis of gliadins was carried out for 37 bread wheat cultivars chosen for their distant relationships. Simple correlations were calculated between each of the 41 bands (variates) observed with these wheats. It was found that a band is usually negatively correlated with the two neighbouring mobility bands. The number of bands positively or negatively correlated with a given band varies from 2 to 8. Taking the bands significantly positively correlated with each-other 32 groups were constituted. It appears likely that these correlations result from the fact that the genes determining the bands of a given group are situated on one chromosome. Study of the distribution of 15 gliadin bands from 312 F2 grains indicated that 2/3 of the correlations calculated for this progeny were due to linkages.