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¹ Ege Üniversitesi Ziraat Fakültesi Tarla Bitkileri Bölümü, İzmir
² CIMMYT – Ankara, Türkiye DOI : 10.21566/tarbitderg.280131 - Coleoptile length is an important factor determining the sowing depth of wheat. World wide used gibberrellic acid-insensitive dwarfing genes, Rht-B1b (Rht1) and Rht-D1b (Rht2), reduce both plant height and coleoptile length. The purpose of this study was to investigate the mode of inheritance of coleoptile length in crosses of two modern wheat varieties (KS82142/PASTOR and PYN/BAU/3/AGRI/BJY//VEE) with short coleoptile and five landraces (SAR30; RASAD; ICDW-9246; ICDW-21122; SABALAN) and two modern tall variety (ZARGANA-6and ELANDS) with long coleoptile. Reciprocal crosses were made by using these parents and fourteen combinations were obtained. The F₁ plants were evaluated for coleoptile length, primary root number, first leaf characteristics. Correlations between the traits were calculated. Variety ELANDS demonstrated intermediate coleoptile and in crosses with short-coleoptile varieties demonstrated over dominance. Intermediate inheritance or partial dominance for coleoptile length were observed in other twelve combinations. Based on this type of inheritance, selection for longer coleoptile length should be conducted in later generations. Significant and positive correlation between coleoptile length and first leaf length was determined. The correlations between primary root number and two other characteristics were observed as low and statistically non- significant. Keywords : Bread wheat (Triticum aestivum L.), coleoptile length, Rht genes, reciprocal cross