RÉSUMÉ
The present experiment was conducted to study the variability, heritability and genetic advance in F2 segregating population derived from the cross, RNR-15048 x Dokra-Dokri, evaluated in augmented design with two checks at ICAR-IIRR, Hyderabad during the Kharif-2022. Analysis of variance revealed the presence of significant differences for all eleven traits examined, indicating the presence of genetic variation between the individuals studied. Higher values of Genotypic Coefficient of Variation (GCV) and Phenotypic Coefficient of Variation (PCV) were observed for panicle weight, number of filled grains, number of unfilled grains, total grains per panicle, and single plant yield. Least difference was observed between PCV and GCV value for almost all the traits indicating the little influence by the environment and possibility for genetic improvement of these traits through selection. The traits plant height, panicle weight, number of filled grains, number of unfilled grains, total grains per panicle, spikelet fertility, thousand grain weight and single plant yield recorded high heritability (>60%) associated with high genetic advance as percent of mean (>20) resulting in no environmental influence on the expression and selection for improvement of such characters could be worthwhile. High heritability coupled with moderate genetic advance as percent of mean was observed for panicle length propounding non-additive gene action in their inheritance suggesting heterosis breeding could be useful for improving these traits. Overall high PCV and GCV coupled with high heritability and high genetic advance as percent of mean was noticed for panicle weight, number of filled grains, number of unfilled grains, total grains per panicle, and single plant yield suggesting significant amount of variability with predominance of additive type of gene action. Hence, direct phenotypic selection.
RÉSUMÉ
Aim: The study was done with an aim to find out whether there is any shift in major crops in Southern Telangana Zone with respect to area, production and yield due to the restoration of tanks with the Mission Kakatiya program and to study the growth in tank irrigated area.Data Description: Time series data of 15 years from 2005-10 to 2015-20 which consists of area, production and yield of major crops (Paddy, Maize, Cotton and Groundnut) and area under tank irrigation in Southern Telangana Zone were utilized for the study and was collected from Statistical Year Books published by Directorate of Economics and Statistics.Methodology: Analysis was done with the help of analysis platforms like SPSS and Excel using statistical tools which include linear and compound growth rates.Results: Results revealed that there was a considerable and significant growth observed in area under tank irrigation (29.69%) in Southern Telangana Zone after Mission Kakatiya. With the increase in tank irrigated area, this zone showed a shift towards irrigated and commercial crops like Paddy, Cotton and Maize from the rainfed crops.Conclusion: During the period before Mission Kakatiya there was a negative growth observed in tank irrigated area whereas both the growth rates have turned to positive in the period after implementation of Mission Kakatiya. This study concluded that there is a positive impact on crop characteristics in this zone due to Mission Kakatiya program. As a whole Mission Kakatiya is one of the outstanding projects whose achievements are incomparable and is a blessing for the farmers of Telangana State.