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¹ GAP Uluslararası Tarımsal Araştırma ve Eğitim Merkezi, Diyarbakır
² Atatürk Üniversitesi, Ziraat Fakültesi, Tarla Bitkileri Bölümü, Erzurum DOI : 10.21566/tarbitderg.358993 - This research was carried out at plant growth chambers of Field Crops Department, at experimental area the Faculty of Agriculture at Atatürk University, between 2009 and 2011. A total of 64 bread wheat genotypes were used as plant material in the study. Genotypes were grouped according to registration years (local genotypes, 1929–1968, 1970–1979, 1988–1994, 1995–1999 and 2000–2006 periods); the relationships between coleoptile length in four different test environments and plant height and grain yield were investigated. There is a positive and significant relationship between the registration year and the grain yield. It was determined that there is a negative and significant relationship between registration year and plant height, soil-dark coleoptile length, soil-light coleoptile length, paper-dark coleoptile length. The relationship between the groups and the features were examined by biplot analysis method. In the biplot graphic created with the average values of groups, it was observed that local genotypes were very close to plant length and coleoptile length and were far away to grain yield. As the registration year increases, the groups moved away from the plant height and coleoptile lengths and approached grain yield. It was determined that the 6th group formed by cultivars registered in 2000–2006 period was furthest to coleoptile length and plant height, and closest to grain yield. It was determined that in Turkish bread wheat cultivars breeding shortened the coleoptile length along with the plant height, and increase grain yield. Keywords : Bread wheat, registration year, plant height, coleoptile length, grain yield