INHERITANCE OF PLEATED FOLIAGE AND RED FLOWER IN IXORA
Ixora, a popular woody bedding plant, has many flower colors. Besides its bright flower color, there is another interesting mutant trait of pleated leaf. To conduct a successful improvement program to create a hybrid of commercial interest, a breeder ought to have inheritance knowledge of the trait of concern. A hybrid between a red flower with pleated leaf Ixora coccinea Bangkok Bow, a mutant, and a yellow flower with normal leaf Ixora chinensis Singapore Yellow was made. Flowers of all progeny of the interspecific hybrid had orangish red color, with co-existence of red and yellow pigments. However, the population segregated into two leaf forms, suggesting a qualitative trait. The test cross ratio of 1:1 for normal leaf-to-pleated leaf was confirmed by Chi-square test. Thus, the mutant leaf form is a dominant trait.
Wannakrairoj, S. and Meesakul, P. (2014). INHERITANCE OF PLEATED FOLIAGE AND RED FLOWER IN IXORA. Acta Hortic. 1025, 61-64
Ixora chinensis, I. coccinea, interspecific, hybrid, chromosome, dominant