Heterosis studies for seed cotton yield and yield contributing traits in desi cotton (Gossypium arboreum L.)

摘要

The present investigation was undertaken to study "Heterosis studies for yield traits in desi cotton (Gossypium arboreum L.)" programme involving twenty four hybrid combinations derived by crossing six arboreum lines (PA 713, PA 743, PA 734, PA 760, PA 720, PAIG 326) with four arboreum testers (PA 255, PA 402, PA 08, PA 528) were tested along with their parents including 2 checks (PKVDH 1, SWADESHI 651) at Cotton Research Station, Mahboob Baugh Farm, Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani during fchan/season of 2013-2014. The observations on 13 yield attributing characters were recorded viz., days to 50 per cent flowering, Days to 50 per cent boll bursting, days to maturity, Plant height (cm), sympodia/plant, bolls/plant, seeds/boll,Boll weight (g), seed index (g), seed cotton yield/plant (g), lint index, harvesting index, ginning outturn. The economic heterosis was calculated over standard check PKVDH 1,SWADESHI 651. The magnitude of heterosis and heterobeltosis for all the characters in the present study was highly appreciable. Among all the characters, the magnitude of mid parent, better parent and standard heterosis was highest for sympodia/plant . PA 760 x PA 08 for seed cotton yield/plant, cross PA 720 x PA 528 for seed/bollin case of mid parent and standards checks, cross PA 720 x PA 08 and PA 760 x PA 528 for boll weight, cross PA 720 x PA 255 for ginning outturn were found most su/ior cross for respective characters. There is no positive significant in case of plant height.The cross PA 760 x PA 08 was found most heterotic over standard hybrids and commercial hybrid for seed cotton yield/plant.