Monogenic Segregations in Backcross Progenies of Capsicum baccatumx Two Interspecific F1 Hybrids and Some Possible Explanations for Distorted Segregation Ratios in Capsicum

Authors : Ahmet Naci ONUS

Pages : 319-328

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Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Monogenic segregations of certain morphological and isozymic characters were studied in backcross progenies of Capsicum baccatumL. insert ignore into journalissuearticles values( Solanaceae); x two interspecific F1 hybrids and distorted segregation ratios were noted. It was observed that isozyme markers Est-5, Idh-1, Pgm-2, and Pgi-2, and morphological marker gene P for fruit persistence showed distorted segregation ratios in the first backcross generation of both C. baccatumHawkes 6489 insert ignore into journalissuearticles values(P.G.Smith); x F1 insert ignore into journalissuearticles values( C. baccatum Hawkes 6489 x Capsicum cardenasii Heiser Smith); and C. baccatum SA219 insert ignore into journalissuearticles values(P.G.Smith); x F1 insert ignore into journalissuearticles values( C. baccatum SA219 x Capsicum eximiumA.T.Hunz);. Both progenies and an excess of individuals carrying alleles inherited from C. baccatum. A further gene, y, controlling fruit colour and segregating in the backcross of C. baccatum Hawkes 6489 x F11 insert ignore into journalissuearticles values( C. baccatum Hawkes 6489 x C. cardenasii);, also showed a distorted segregation ratio with an excess of homozygous individuals. However, in backcross families from interspecific crosses, Skdh-1 showed a distorted segregation ratio with an excess of heterozygous individuals.
Keywords : Morphological characters, isozymic characters, monogenic segregation, distorted segregation ratios