Gossypium Hirsutum L Genotiplerinin Verim ve Kalite Karakterlerinin Combine Yeteneği Çalışmalarının Değerlendirilmesi

Abstract

Bu çalışma, iyi kaliteli ve yüksek verimli pamuk çeşitlerinin değerlendirmesi amacıyla yürütülmüştür. Bu amaçla, pamuk çeşitlerindeki verim ve kalite ile ilgili farklı bitki karakterleri için kombinasyon yeteneği etkileri hesaplanmıştır. Mevcut çalışma ıslah programları için farklı çeşitlerin potansiyelini ortaya koymuştur. FH-945, MNH-93, MNH-129, CIM-496, CIM-446 ve NIAB-78 gibi 6 ebeveyn koza ağırlığı ve lif mukavemeti hariç bitkilerin genel ve özel kombine yetenekleri için farklı karakterler göstermiştir. CIM-496 bitki başına koza sayısı, pamuk çiğidi verimi, tiftik oranı, lif uzunluğu ve lif inceliği yönünden en iyi genel kombinasyonu vermiş, bunu MNH-129 hattı takip etmiştir. CIM-496xNIAB-78 hibridi bitki başına koza sayısı yönünden, CIM-496xNIAB-78 hibridi pamuk çiğidi verimi, MNH-129xCIM-446 hibridi en iyi tiftik oranı, CIM-496xCIM-446 hibridi ise en iyi lif uzunluğu spesifik kombine yeteneğini vermiştir. Bazı hibritlerde ebeveynlerden birisi iyi genel kombine yeteneği gösterirken bazılarında zayıf combine yeteneği göstermiştir. Örneğin, CIM-446xNIAB-78 bitki başına koza sayısı, CIM-446xNIAB-78 pamuk çiğidi verimi, MNH-93xNIAB-78 tiftik oranı ve MNH-93xCIM-446 lif uzunluğu yönünden böyle bir özellik göstermiştir. Dominant gen etkisiyle elde edilen parametreler karakterlerin genetik manipülasyonunda genlerde eklemeli olmayan etkinin mevcut olduğunu ortaya koymuş ve bu durum kalıtsallığın kompleks olabileceğini, hibrit oluşturmada daha ileri genetik değerlendirmelerin gerektiğini göstermiştir. Genetik tezahürü eklemeli kontrol eden parametreler kalıtsallıkta az tesirli olacağından f2’den sonra tek bitki seleksiyonu yapmak suretiyle daha ileri genetik değerlendirmenin mümkün olabileceğini göstermektedir

Keywords

• Gossypium hirsutum, genel kombine yeteneği, özel kombine yeteneği, gen tezahürü, verim, kalite

Evaluation of Gossypium Hirsutum L. Genotypes for Combining Ability Studies of Yield and Quality Traits

Abstract

Current study was carried out to study plant material for good quality and high yielding cotton varieties.

For this purpose combining ability effects were calculated for different plant traits related to yield and quality

in upland cotton. The present study revealed the potential of different varieties for breeding programme. All six

parents i.e. FH-945, MNH-93, MNH-129, CIM-496, CIM-446 and NIAB-78 displayed their prospective general

and specific combining abilities for various characters except boll weight and fiber strength. CIM-496 proved the

best general combiner for number of boll per plant, seed cotton yield, lint percentage, fiber length and fiber fineness

while MNH-129 followed closely. The hybrid CIM-496 × NIAB-78 displayed diligent specific combining ability

for number of bolls per plant, CIM-496 × NIAB-78 for seed cotton yield, MNH-129 × CIM-446 for lint percentage

and CIM-496 × CIM-446 for fiber length. Some of the hybrids involved one parent with good and one with poor

general combining ability e.g., CIM-446 × NIAB-78 for number of bolls per plant, CIM-446 × NIAB-78 for seed

cotton yield, MNH-93 × NIAB-78 for lint percentage and MNH-93 × CIM-446 for fiber length. Parameters with

dominance gene effects revealed that the genes having non-additive influence were present in the genetic makeup

of the characters, and this pattern of inheritance seems to be complex, suggesting that further genetic advance may

be possible by making hybrids. While parameters having additively controlled genetic action will have scarce

complexion in their inheritance, suggesting that further genetic advance may be possible by making single plant

selection from F2 generation.

Keywords

• Gossypiun hirsutum,general combining ability,specific combining ability,gene action,yield,quality

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