FASULYE (Phaseolus Vulgarıs L.)' DE TANE RENGİ İLE TOHUM KALİTESİ İLİŞKİSİ

OZET : Fasulyede beyaz taneli cesitlerde  kalitsal yapiyla ilgili olarak tohum kalitesi dusuk olabilmektedir. Bu cesitlerde, cevre sartlarina daha hassas olmalari nedeniyle, zayif fide gelismesi ve dusuk verim gorulmektedir. Bu calismada, ulkesel olarak tescilli fasulye cesitlerinde (Seker, Sehirali-90, Yunus-90, Karacasehir-90 ve Sahin-90) benzer problemlerin varligini arastirmak amaciyla yurutulmustur.  Kontrol olarak renkli tane rengine sahip KN-127 hatti ve Contender fasulye cesidi kullanilmistir. Arastirmada kullanilan cesitlerin tamami ayri ayri NaNO3 (-1.6 MPa) ve di-iyonize suda test edilmistir. Arastirma sonunda, beyaz taneli cesitlerde renkli tanelilere gore daha yuksek su absorbsiyon orani, fazla miktarda tohum salgilari ve enine kotiledon catlaklari belirlenmistir.  Bu ozellikler, zayif cikis ve fide gelismesine yol acan en onemli sebepler arasinda gosterilmektedir. Bununla birlikte varyeteler arasinda varyasyon tesbit edilmistir.   SEED QUALITY IN PHASEOLUS BEAN ( Phaseolus Vulgaris L.) CULTIVARS IN RELATION TO SEED COLOUR SUMMARY: Early reports indicate that white seeded phaseolus bean cultivars have inherent problems of poor seed quality and higher susceptibility to environmental conditions during seedling growth leading to poor yields. This study was undertaken to screen five nationally registered white seeded Turkish Phaseolus  bean cultivars (Seker, Sehirali-90, Yunus-90, Karacasehir-90 and Sahin-90) in terms of widely encountered causes of poor seed vigour in comparison with coloured seeded genotypes (KN-127 and Contender) under controlled laboratory conditions at The Faculty of Agriculture in Erzurum. Tests showed that white seeded cultivars had higher rates of water absorbtion, higher levels of seed leachate conductivity and greater percentages of transverse cracking on the adaxial and abaxial surfaces of cotyledons, all of which were associated with poor seedling vigour.  However, there occurred variation between and within genotypes.