PJB-2011-369
GENETIC DIVERGENCE AND ASSOCIATION AMONG POLYGENIC CHARACTERS IN GOSSYPIUM HIRSUTUM L.
MARYAM BIBI1, NAQIB ULLAH KHAN1, FIDA MOHAMMAD1, ROZINA GUL1, ABDUL AZIZ KHAKWANI2 AND OBAID ULLAH SAYAL2
Abstract
Development of promising cotton populations with improved agronomic performance is primary objective of the cotton breeders. Genetic potential and variability in 8 × 8 F1 diallel hybrids versus their parental lines, traits correlation and heritability estimates were studied in Gossypium hirsutum L., during 2008-09 at Khyber Pakhtunkhwa Agricultural University, Peshawar, Pakistan. Highly significant variations were observed among the parental cultivars and their F1 hybrids for all traits. Results indicated that F1 hybrids CIM-506 × CIM-554, CIM-473 × CIM-554, CIM-446 × CIM-554 and CIM-446 × CIM-496 (its reciprocal) produced significantly higher seed cotton yield, bolls per sympodia, boll weight and seeds per boll. Most of the F1 populations involving CIM-554 as maternal plant also revealed early maturity. Yield related traits revealed significant positive correlations with seed cotton yield. Heritability (broad sense) was high in magnitude for all traits. Results revealed that traits with high heritability and wide range of genetic variability in breeding material can work as a base population, and their significant contribution towards high yield can help in early segregating generations.
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