Twenty nine cross populations developed according to line × tester mating design along with their twelve parents raised from true potato seeds, were used to study variability and correlation for seven characters....Twenty nine cross populations developed according to line × tester mating design along with their twelve parents raised from true potato seeds, were used to study variability and correlation for seven characters. The range of variation for all the characters were found to be wide and pronounced which indicated that characters were quantitative in nature and were under polygenic control. For all the characters, greater portion of the total δ2p was mostly contributed by the δ2g. Among the seven characters, tuber weight per plant showed the highest δ2g, PCV, GCV, H2b, GA and expected GA%. On the other hand, dry matter contents (%) showed the lowest H2b. Phenotypic and genotypic correlation coefficients of plant height with no. of tubers per plant and tuber weight per plant; no. of branches per plant with no. of tubers per plant and tuber weight per plant were found to be significant and positive.展开更多
Ten crosses involving seven parents crossed in line ×tester design were studied for main stem height.plant-1,main stem leaves.plant-1,stems.plant-1,plant weight.plant-1,average tuber weight.plant-1 and tuber dry ...Ten crosses involving seven parents crossed in line ×tester design were studied for main stem height.plant-1,main stem leaves.plant-1,stems.plant-1,plant weight.plant-1,average tuber weight.plant-1 and tuber dry matter %in F1 generation.The additive gene action was found to be more important for the characters,main stem height.plant-1,main stem leaves.plant-1,stems.plant-1,plant weight.plant-1,and average tuber weight.plant-1.Among seven parents,Lal-silbilati,Lalpakri and Ausha were good combiners for the characters,main stem height.plant-1,main stem leaves.plant-1andaverage tuber weight.plant-1,respectively.For average tuber weight.plant-1,the crosses Patnae/TPS-67 and Lalpakri/TPS-13 showed significant positive specific combining ability effects.Ausha/TPS-67 showed significant positive specific com-bining ability effects for main stem leaves.plant-1.展开更多
The present investigation was undertaken to find out the best medium composition for medium-term preservation of disease free potato shoot tips in in vitro system.Thirteen potato genotypes and fourteen treatments were...The present investigation was undertaken to find out the best medium composition for medium-term preservation of disease free potato shoot tips in in vitro system.Thirteen potato genotypes and fourteen treatments were taken under consideration for the present experiment.Among fourteen treatments,mannitol and sorbitol containing media proved to be the best for medium-term preservation of potato shoot tips.High concentration of mannitol delayed root formation.展开更多
文摘Twenty nine cross populations developed according to line × tester mating design along with their twelve parents raised from true potato seeds, were used to study variability and correlation for seven characters. The range of variation for all the characters were found to be wide and pronounced which indicated that characters were quantitative in nature and were under polygenic control. For all the characters, greater portion of the total δ2p was mostly contributed by the δ2g. Among the seven characters, tuber weight per plant showed the highest δ2g, PCV, GCV, H2b, GA and expected GA%. On the other hand, dry matter contents (%) showed the lowest H2b. Phenotypic and genotypic correlation coefficients of plant height with no. of tubers per plant and tuber weight per plant; no. of branches per plant with no. of tubers per plant and tuber weight per plant were found to be significant and positive.
文摘Ten crosses involving seven parents crossed in line ×tester design were studied for main stem height.plant-1,main stem leaves.plant-1,stems.plant-1,plant weight.plant-1,average tuber weight.plant-1 and tuber dry matter %in F1 generation.The additive gene action was found to be more important for the characters,main stem height.plant-1,main stem leaves.plant-1,stems.plant-1,plant weight.plant-1,and average tuber weight.plant-1.Among seven parents,Lal-silbilati,Lalpakri and Ausha were good combiners for the characters,main stem height.plant-1,main stem leaves.plant-1andaverage tuber weight.plant-1,respectively.For average tuber weight.plant-1,the crosses Patnae/TPS-67 and Lalpakri/TPS-13 showed significant positive specific combining ability effects.Ausha/TPS-67 showed significant positive specific com-bining ability effects for main stem leaves.plant-1.
文摘The present investigation was undertaken to find out the best medium composition for medium-term preservation of disease free potato shoot tips in in vitro system.Thirteen potato genotypes and fourteen treatments were taken under consideration for the present experiment.Among fourteen treatments,mannitol and sorbitol containing media proved to be the best for medium-term preservation of potato shoot tips.High concentration of mannitol delayed root formation.
