Origin of tetraploidization in protoplast cultures of petunia (Petunia hybrida)
Article Abstract:
Multinucleate cells formed during the initiation of the first cell divisions in diploid mesophyll protoplast cultures appear to be the origin of tetraploidization in protoplast cultures of diploid petunia. The formation of these multinucleate cells was the highest at the optimum concentration of plant growth regulators for the induction of cell division, and this was mainly influenced by exogenous plant growth regulators. This suggests that plant growth regulators used in the culture are one of the most critical factors in the induction of multinucleate cells and the ensuing tetraploidization in diploid petunia protoplast cultures.
Publication Name: The Journal of Heredity
Subject: Biological sciences
ISSN: 0022-1503
Year: 1995
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New mutations affecting meristem growth and potential in Petunia hybrida Vilm
Article Abstract:
Mutations have been produced in five loci that genetically control lateral growth in Petunia hybrida Vilm. Three genetic loci have been identified which are involved in apical dominance in P. hybrida. Recessive mutations in these genes cause a highly branched growth habit with insignificant pleiotropic changes. A mutation in the sympodial gene impairs the timing of sympodial meristem formation and meristem potential. A mutation in the arborescent gene inhibits floral identification. This indicates that sympodial branching is independent of floral determination.
Publication Name: The Journal of Heredity
Subject: Biological sciences
ISSN: 0022-1503
Year: 1996
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The inheritance of flower color in Petunia hybrida Vilm
Article Abstract:
Flower color inheritance of Petunia hybrida Vilm depends on the combined inheritance of anthocyanin pigmentation and pH. Many independent genes such as Hf and Mf, that follow simple Mendelian genetics, modulate the inheritance of anthocyanin color. Two independent codominant genes, Ph1 and Ph2, modulate the inheritance of pH which is more complex. Linkage of the anthocyanin and pH genes arrests the expression of all the possible gene combinations.
Publication Name: The Journal of Heredity
Subject: Biological sciences
ISSN: 0022-1503
Year: 1996
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