Guiping Fang, Mengyuan Fan, Yufu Cheng*, Xu Yang, Xuehao Chen
Yangzhou University, School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, Jiangsu, China.
*Corresponding author: Yufu Cheng
Abstract
In this study, three high-generation inbred lines of eggplant 19-37, eggplant 19-38 and 19-31 were used to prepare two hybrid combinations for selfing and back-crossing, respectively, and six generations of P1, P2, F1, F2, B1 and B2 were established. When the fruit reached edible maturity, the soluble sugar content of eggplant fruit was determined by anthrone-sulfuric acid colorimetry, and the genetic law of soluble sugar was studied by the main gene + polygene mixed genetic model analysis. The results showed that the F2, B1 and B2 segregation popula-tions of soluble sugar in eggplant hybrid combinations were in line with continuous variation and normal distribution, which was in line with the genetic law of multi-gene control. After analysis, it was concluded that the genetic characteris-tics of soluble sugar in the two combinations were suitable for the B-1 model, namely, the additive-dominant- epistatic model of two pairs of main genes. The B2 population of the two combinations was subject to a high genetic rate of main genes, and the F2 population of the two combinations was subject to a relatively large environmental impact, indicating that it was not suitable for early selection and suitable for late selection. The results can provide theoretical basis for quality inheritance and new variety breeding of eggplant.
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