APPLICATION OF COLOUR SENSORS TO ESTIMATE DEGREE OF GENE DOMINANCE ENCODES COLOUR OF CHILI-PEPPER FRUITS PROGENY

Abstract

Colour is an interesting character to be studied in breeding program of ornamental chilli. Colour   of   plant   was   affected   by   the   accumulation   chlorophyll,   carotenoids   and anthocyanins that regulated by multiple genes controlling color (gene B, gene cl, gene y +, gene c1 / c2, and gene A). Genes regulating of colour have different dominance degrees thus affecting potential properties inherited in plants. Aim of the research was to determine

the alleged dominance of the gene encoding a colour using the colour ratio of female and male parent, and also population of   F1 generation. Research materials used are F1 generation and reciprocal accession (A, BR, and CP). The measured parameter was the character of   fruit colour using a colour sensor Conica Minotla 400 to get the value of L*a*b* (L: brightness; a: axis extends from green (-a) to red (+a); b: the b axis from blue (- b) to yellow color).Quantitative measurement based on the coordinates L*a* b* showed Chroma and Hue values that describe the color of the fruit. The results showed that the potential value of color brightness ratio of generation F1  and F1R (F1: AxBR, F1R: BRxA) were over dominant. Gene partially dominant shown in cross breeding of accession A and CP (F1: AxCP, F1R: CPxA).

Keywords: Colour sensors, chili-pepper fruits, gene dominance