Khan N.U., Hassan G., Kumbhar M.B., Kang S., Khan I., Parveen A., Umm-e-Aiman, Saeed M.
Department of Horticulture and Crop Science, The Ohio State University, OARDC, 1680 Madison Ave., Wooster, OH 44691, United States; NWFP Agricultural University, Peshawar 25130, Pakistan; Sindh Agriculture University, Tandojam 70060, Nigeria; National Ins
Khan, N.U., Department of Horticulture and Crop Science, The Ohio State University, OARDC, 1680 Madison Ave., Wooster, OH 44691, United States, NWFP Agricultural University, Peshawar 25130, Pakistan; Hassan, G., NWFP Agricultural University, Peshawar 25130, Pakistan; Kumbhar, M.B., Sindh Agriculture University, Tandojam 70060, Nigeria; Kang, S., Department of Horticulture and Crop Science, The Ohio State University, OARDC, 1680 Madison Ave., Wooster, OH 44691, United States, National Institute of Crop Science, RDA 151 Seodung-Dong, Suwon 441-857, South Korea; Khan, I., NWFP Agricultural University, Peshawar 25130, Pakistan; Parveen, A., Department of Plant Breeding and Genetics, NWFP Agricultural University, Peshawar 25130, Pakistan; Umm-e-Aiman, Department of Plant Breeding and Genetics, NWFP Agricultural University, Peshawar 25130, Pakistan; Saeed, M., Department of Plant Breeding and Genetics, NWFP Agricultural University, Peshawar 25130, Pakistan
Performance of F1 hybrids, F2 population and some selected population in advanced generations (F3, F4 and F5) were studied for bolls per plant, seed cotton yield per plant, lint % and staple length of Gossypium hirsutum during 1999-2004 at Agricultural Research Institute, Dera Ismail Khan, NWFP Pakistan. In F1 hybrids, maximum heterosis was observed for seed cotton yield per plant followed by bolls per plant while lint % and staple length showed low values of heterosis. Majority of the F2 population displayed inbreeding depression and it was high for seed cotton yield per plant followed by bolls per plant, lint % and staple length. Inbreeding depression was higher in high performing hybrids than in low performing hybrids. In F1 generation, heterosis over better parent ranged from +3.13 to +65.63% for bolls per plant, +0.82 +115.22% for seed cotton yield per plant, +0.27 +3.88% for lint % and +0.28 to +6.00% for staple length. In F2 population the average some selections were made in promising cross families (CIM-109 × CIM-1100, CIM-240 × CIM-1100, CIM-1100 × CIM-109 and CIM-1100 × CIM-240). In advanced generations (F3, F4 and F5), the single plant families of the above four selected crosses superseded the standard cultivar (CIM-446) for bolls and seed cotton yield per plant and staple length, but in lint % only few of the cross families exhibited superiority over standard. © EuroJournals Publishing, Inc. 2007.
