Assessment Of Frequency Distribution In F3 generation of Sorghum (Sorghum bicolor L. Moench.) For Grain Yield And Its Attributed Traits

Abstract

The present study was conducted to assess the gene interaction for grain yield and its attributing traits towards the increase of grain yield in sorghum. In F3 generation, symmetrical distribution, positive skewness and negative skewness were observed for 14 traits in various crosses. Symmetrical distribution indicates the presence of segregating genes that gives wider variation in F3 populations. Significant and positive skewness indicates the complementary type of gene action hence the expected genetic gain is slower with mild selection and faster with intensive selection for that particular trait. Significant and negative skewness denotes the presence of duplicate epistatic gene action therefore the gain is faster with mild selection and less rapid with intense selection. In kurtosis, leptokurtic and mesokurtic nature was observed which indicate that the traits are under the control of few segregating genes and the next indicates the nonsignificant of kurtosis respectively. The intensive selection of these characters in F3 generation paved the way to achieve the gain faster