Preliminary Study on the Genetic Patterns of Several Fruit Traits in the Hybridized Offspring of Korla Pear and Cuiguan Pear
In order to summarize the traits of the F1 generation population,refine its laws from the perspective of genetics,and provide reference for future pear hybrid breeding work,this study used Korla Fragrant Pear×Cuiguan and their hybrid offspring as materials.Through the observation,measurement and analysis of some traits(single fruit weight,fruit shape index,heart fruit ratio,soluble solids,peel hardness)of the mature fruit of 31 F1 plants of the hybrid combination for two consecutive years,20 of them were recorded in the phenological period.The results showed that the average single fruit weight of hybrid offspring was higher than the mid-parent value,and 74.19％of the average single fruit weight per plant exceeded the mid-parent value.The large fruit characteristics of the male parent Cuiguan were relatively easier to be inherited to the offspring.The average values of soluble solids content,peel hardness and fruit shape index were less than the median value,and there was a decreasing trend.The average fruit ratio of the offspring was slightly lower than the mid-parent value,and 83.87％of the average fruit ratio of the single plant was concentrated between the two parental fruit ratios,showing a more obvious genetic trend of the center.Except that the single fruit weight was 115.93％,the other traits did not exceed 100％,and the heterosis rate was negative.The traits of the two parents were degraded when they were transmit-ted to the hybrid offspring.The dispersion degree of fruit development days data was low,the average value of offspring was slightly lower than the mid-parent value,and the offspring were generally more inclined to be early maturity.In summary,the big fruit trait of the male parent Cuiguan is relatively easier to inherit to future generations;soluble solids content,peel hardness,fruit shape index have a decreasing trend;the heart-fruit ratio show a more obvious genetic trend towards the middle;the offspring are generally more inclined to early maturity.The offspring of the hybrid combination combines the advantages of large fruit type,low hardness,small fruit core,early maturity,fruit type rounding,etc.,overcomes some shortcomings of the parents,and the selection is more scientific and reasonable.It has certain potential for breeding superior varieties.
万方数据
维普
