Fosfor Eksikliğine Dayanıklı Mısır Zea mays L. Genotiplerinin Belirlenmesi

Yaray ışh fosforun düşük olduğu topraklarda yeti şen çeşitlerin geliştirilmesi için önerrı li strateji düşük fosfor stres' koşulları nda fosfor eksikliğine toleransl ı çeşitlerin seçilmesidir. Bu çal ışmada Furio, Riogrande, Sele, DK 743, Helix, Missouri, Betor ve Poker m ı sı r çeşitlerinin fosfora etkinlikleri ara şt ı r ı lmıştı r. Deneme sera koşullar ı nda yürütülmüştür. Fosfor topra ğa O, 50 ve 100 mg kg-1 seviyelerinde KH2PO4' den uygulanm ışt ı r. Deneme sonunda bitkilerin yaş ve kuru ağı rl ı kları ile bitkilerin P konsantrasyonlar ı ve içerikleri belirlenmi ştir. Bitkilerin yaş ve kuru a ğırl ı klar ı ile bitkilerin fosfor konsantrasyonlar ı ve P içerikleri aras ı ndaki ilişkilerden yararlan ı larak mı sı r çeşitlerinin fosfor etkinlikleri ortaya konulmu ştur. Deneme sonuçlar ı na göre Furio, Sele, DK 743, Helix ve Missouri çe şitleri düşük fosfora toleransl ı olarak seçilmişlerdir.

Anahtar Kelimeler:

Mısır genotipleri, P noksanlığı, P kulanım etkinliği

Determination of Phosphorus Deficiency Resistant Maize Zea mays L. Genotypes

Genotype screening and selection for tolerance to low-phosphorus stress conditions is an important strategy for the development of cultivars growing on soils low in available P. In this study, phosphorus efficiency of maize cultivars, Furio, Riogrande, Sele, DK 743, Helix, Missouri, Betor, and Poker was investigated. The experiment was carried out under greenhouse conditions. Phosphorus was applied to the soil O, 50, and 100 mg kg-1 levels as KH2PO4. Fresh and dry weights and P concentration and P uptake of plants were determined at the end of experiment. P-efficiency was determined from the relationship between fresh and dry weights and P concetration and P uptake rate parameters of the cultivars. According to experiment results the genotypes Furio, Sele, DK 743, Helix and Missouri were selected as tolerant to tow-P.

Keywords:

Maize genotypes, P deficiency, P use efficiency,

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