F2 Pamuk (Gossypium hirsutum L.) Populasyonlarında Kalıtım ve Path Analizi

Kalıtım derecesi, genetik ilerleme ve kütlü pamuk verimi için doğrudan etkilerin tahminlenmesi dolaylı seleksiyon kriterinin belirlenmesi için önem taşımaktadır. Bu amaçla yedi anaç ve bunlara ait F2 populasyonları ileri generasyonlara aktarılabilecek üstün populasyonların belirlenmesi yönünden değerlendirilmiştir. Kütlü pamuk verimi ve lif kalitesi yönünden Claudia x AGC-208, Claudia x AGC-85 ve MD x AGC-85 populasyonlarının üstün populasyonlar olduğu saptanmıştır. Koza sayısı ve lif inceliği yönünden yüksek kalıtım derecesi ve genetik ilerleme belirlenmiştir. Korelasyon ve path analizi sonucunda kütlü pamuk verimi için yürütülecek ıslah çalışmalarında koza sayısı, koza ağırlığı ve koza açma gün sayısının seleksiyon kriteri olarak kullanılabileceği sonucuna varılmıştır.

Anahtar Kelimeler:

genetik ilerleme, korelasyon, path analizi, kalıtım, açılma

Heritability and Path Analysis in F2 Populations of Cotton (Gossypium hirsutum L.)

The estimation of heritability, genetic advance and direct effect of yield attributing components on seed cotton yield have been used to develop indirect selection criteria. For this purpose, seven parents and their F2 populations were evaluated for the identification of superior populations to be transferred to further generations. Claudia x AGC-208, Claudia x AGC-85 and MD x AGC-85 combinations were superior F2 populations for seed cotton yield and fiber quality. The highest heritability and genetic advance were recorded in boll number and fiber fineness. The results of correlation and path analysis indicated that boll number, days to first boll opening and boll weight could be used as selection criteria to improve seed cotton yield.

Keywords:

correlation, genetic advance, heritability, path analysis, segregation,

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