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In the present study forty five intra-hirsutum hybrids along with their parents and standard check were evaluated to estimate the magnitude of heterosis for yield and fibre quality traits at Regional Agricultural Research Station, Lam, Guntur during Kharif, 2017-18. The standard heterosis was calculated over check hybrid, LAHH 5. The hybrid combinations, SCS-1207 × GSHV-177, GSHV-177 × L1231 and SCS-1207 × PBH-13 were found to be promising for seed cotton yield plant -1 along with majority of yield components and fibre quality traits in terms of standard heterosis. These genotypes may be evaluated over locations for further confirmation of their superiority for exploiting them commercially.

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India is the second largest country after China, which has implemented hybrid rice technology on a commercial scale. Government of India launched a mission mode project on hybrid rice during 1989 and Andhra Pradesh was the first state in India to release two hybrids, APHR-1 and APHR-2 during the year 1994 from Regional Agricultural Research station, APRRI, Maruteru for commercial cultivation. As a result of concerted research and development efforts for more than two decades by the Indian scientists, a total of 93 hybrids have been released so far from 1994 to 2017 for

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