Indian Society of Genetics & Plant Breeding

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New flower shapes in Linum grandiflorum Desf. and their inheritance

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The inbred lines of Linum grandiflorum that differ in the
shape of a flower, F1 and F2 population derived from the
crosses involving the inbreds were used to study flower
shape inheritance pattern. Some lines had shortened petals
and in the shape of a flower resembled wild carnations.
Another line was distinguished by the strongly involute
edges of the petals which gave the flower a stellate shape.
F1 plants from the cross between carnation-flowered and
stellate-flowered plants with wild type lines (non-shortened
petals, non-stellate flower) and also among themselves
had wild type of flower shape. The F2 showed a 15 : 1 ratio
of normal-petalled (wild type) and shortened-petalled plants
indicating the control of the carnation shape of flower (“cnf”
= carnation flower) by two uniquely acting genes. Stellate
shape of flower (“st” = stellate flower) in crosses with nonstellate lines was inherited as monogenic recessive trait
showing in F2 a 3 : 1 ratio of non-stellate and stellate plants.
Stellate and carnation shapes of a flower were determined
by different genetic systems and inherited independently.
In the case where the parents of the F1 hybrids differed not
only in the shape of the flower, but also in its color, the
independent inheritance of the genes determining the
carnation type of the flower and the three-locus system
responsible for its coloring was established. Independent
inheritance of the stellate flower gene and Si-locus, the
recessive allele of which lightens the color of the petals
and the spot in the center of the flower was also shown.
 

Keywords: L. grandiflorum, flower shape, shortened petal, involute petal, inheritance

Info

Year: 2018
Volume: 78
Issue: 1
Article DOI: 10.5958/0975-6906.2018.00015.9
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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