Ahuja, Y. R.
A genetic analysis of locule number by means of diallel crosses was performed on eleven inbred lines of the tomato. The validity of certain assumptions which are basic to the analysis was investigated. Interaction of genotype with environment was detected on the arithmetic scale as well as on the logarithmic scale. However, a logarithmic transformation of the data was shown to be useful in order to reduce this interaction.
On the logarithmic scale epistatic interactions were not detected. Dominance estimtes indicated., that on the average there was partial dominance of low locule number over high locule number. There was an excess of recessive genes for locule number in the parental lines and the distribution of positive and negative alleles was highly asymetrical.
The test indicated that at least five loci vith major effects influence the genetic variability of locule number. Two of these five loci were already known (o and f). The newly hypothesized loci were tentatively termed as loc\1, loc\2 and loc\3 . On the logarithmic scale there was partial dominance of the high over the low locule number at o and loc\1, and a partial dominance of the low over the high locule number at f, loc\2 and loc\3 . Differences in locule number are probably affected by minor genes in addition to the above mentioned five major genes.