Study on the heredity and variation of leaf morphological character of sexual progenies of the citrus somatic hybrid

The heredity and variation of leaf morphological character of sexual progenies of citrus somatic hybrid has been studied. Results showed that the average leaf length, width and area of sexual progenies was smaller than those of their parents and the thickness was similar to that of parents, whereas the average stoma length and density were intermediate between of the two parents. The variation range of leaf length, width, area, and thickness and stoma length, width, density of the sexual progenies were crisscrossed with their parents. The variation range of other parameters was larger, except the leaf thickness. χ2(Chi-Square) test indicated that 1∶1 segregation was detected in leaf shape, presence or absence of leaf apex notch and wing leaf shape. If the diploids and triploids are considered as an independent population respectively, by the hypothesis test of the average notably significant difference was observed in leaf length and stoma length and density between the two populations, together with significant difference in leaf width and stoma width; while the leaf thickness is almost the same. However, there was no obvious gap in leaf length, width, thickens and stoma size, density of single plant between diploids and triploids; their observation value crisscrossed with each other.