tailieunhanh - Heterosis and combining ability for yield components and fiber quality parameters in a half diallel cotton (G. hirsutum L.) population

Combining ability and heterosis were determined in a population obtained from the half diallel crossing of 6 different cotton genotypes for yield components and fiber quality parameters. | Turk J Agric For 27 (2003) 207-212 © TÜB‹TAK Heterosis and Combining Ability for Yield Components and Fiber Quality Parameters in a Half Diallel Cotton (G. hirsutum L.) Population1 Hüseyin BAfiAL*, ‹smail TURGUT Adnan Menderes University, Faculty of Agriculture, Department of Crop Science, Ayd›n -TURKEY Received: Abstract: Combining ability and heterosis were determined in a population obtained from the half diallel crossing of 6 different cotton genotypes for yield components and fiber quality parameters. For breeding purposes, to improve the investigated characters some suitable parents were selected for different characters: DPL 5690 for number of bolls per plant, Acala SJ-5 for boll weight and fiber length; Nazilli-84 and Carmen for seed cotton yield and lint percentage; Tamcot CAMD-E for earliness and fiber fineness; and PD 6168 for fiber strength. When the crosses were evaluated for the investigated characters Tamcot CAMD-E x Carmen, Nazilli84 x PD 6168, DPL 5690 x Tamcot CAMD-E and Tamcot CAMD-E x PD 6168 are considered promising combinations for further research. It was concluded that applying 3-way crosses, or modified backcross or recurrent selection to genotypes having good combining ability would improve yield and fiber quality. Key Words: Cotton, diallel analyses, heterosis, general and specific combining ability Yar›m Diallel Pamuk (G. hirsutum L.) Populasyonunda Verim Komponentleri ve Lif Kalite Özelliklerinin Heterosis ve Uyuflma Yetenekleri Özet: Alt› farkl› pamuk çeflidinin yar›m diallel melezlenmesiyle oluflturulan populasyonunda verim komponentleri ve lif özellikleri yönünden uyuflma yetenekleri ve heterosis de¤erleri saptanm›flt›r. Ele al›nan özelliklerin gelifltirilebilmesine yönelik olarak yap›lacak ›slah çal›flmalar› bak›m›ndan, bitkide koza say›s› için DPL 5690; koza kütlü pamuk a¤›rl›¤› ve lif uzunlu¤u için Acala SJ-5; bitki kütlü pamuk verimi ve ç›rç›r rand›man› için Nazilli-84 ve Carmen; erkencilik oran› ve lif inceli¤i .

• Nông nghiệp
• Cotton genotypes
• Diallel analyses
• General and specific combining ability
• Yield components
• Seed cotton yield
• Density planting system
• Irrigated ecosystem
• High density planting system
• Compact cotton genotypes under
• Genetic variability
• Genetic advance
• Correlation and seed cotton yield
• Brown coloured cotton genotypes
• Antioxidative enzyme
• Sucking pest
• Antioxidative responses in cotton
• Cotton (Gossypium hirsutum L
• Genotypes imparting resistance
• Sucking pest attack
• Simple sequence repeats
• Tetraploid cotton
• Cotton leaf curl disease
• Genetic diversity
• DNA marker
• Agarose gel electrophoresis
• ISSR primers
• Susceptible genotypes
• Genetic diversity in upland cotton
• Gossipium hirsutum
• Fiber quality traits
• SSR markers for fiber quality traits
• Molecular characterization of cotton
• Expression of Bt gene
• Different plant parts
• Different stages
• Bt cotton genotypes
• Gene expression
• Amrasca biguttula biguttula
• Varieties/genotypes
• Rainfed conditions
• High density
• Growth parameters
• Upland cotton
• Yield contributing traits
• Genotypes on growth parameters
• Cotton Gossypium hirsutum L
• Genetic relationship
• Random amplified polymorphic DNA
• Polymerase chain reaction method
• Gossypium genotypes
• Yellow mite
• Morphological character
• Biochemical character
• Biochemical basis of resistance
• Osmotic potential
• PEG 6000
• Seddling vigour
• Slanting glass plate technique
• Evaluation of cotton genotypes
• Indian economy
• Cultivars/genotypes
• Breeding programme
• American cotton (Gossypium hirsutum L )
• Genetic diversity in American cotton
• Planting geometry
• Boll weight
• Growth and yield of cotton
• Sucking pests
• Emerging pests
• Bollworm complex
• Sucking pests and bollworms
• Field evaluation of genetic variability
• Gossypium barbadense L
• Per se performance
• Heritability and genetic advance