Genetic control of green banner,keel and seedcoat color in common bean (Phaseolus vulgaris L.)
2004
Genchev, D. (Dobroudja Agricultural Institute, 9520 General Toshevo (Bulgaria))
Green color of the different plant parts is due to the chloroplasts containing chlorophyii A and chlorophyii B in various combinations. According to the plant organ, chlorophyll disintegrates at a certai stage of the plant's ontogeny and green color turns to white. The aims of this study were to determine the genetic control of green banner, keel and seedcoat color. P1, P2, F1, F2 and BC2 of 15 crosses between accessions with green and white seedcoat of immature seed, bannner and keel were used. The linkage between Bpc and IW loci determined with the program Mapmarker 3.0. Linkage distans was calculated as two-point data based on Kasmbli mapping function. In F2 the segragation of all three characters was close to expected ratio 3 (green) : 1 (white). In the cross DG 91-10 x Dobrudjanski ran, gene linkage determining green seedcoat of immature seed (IW) and green banner color (Bpc), positioned at 26 cM at LOD 2.68, was established. We suggest the symbols Kpc for the dominant allele controlling green color and kpc for the recessive allele controlling white color of keel's tip twisting; Bpc for the dominant allele controlling green color and bpc for the recessive allele controlling white color of banner. The cultivar Abritus with whait banner and immature seedcoat and breeding line DG 91-10 with green banner and immature seedcoat were proposed as suitable example accessions.
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