草莓杂交后代主要性状遗传分析OA

The hybrid progeny 2022-9 was used as the test material,and a randomised block design was selected to analyse the main biological and fruiting traits,with a view to providing a reference basis for strawberry hybrid breeding.The results showed that,in terms of biological traits,the mid-parental dominance of chlorophyll a,b,total chlorophyll,carotenoids and petal number were posi-tive,and tended to increase in the progeny,and the coefficients of variation of leaf shape index,chlorophyll a and petal number were higher,29.20％,15.06％and 13.67％,which were rich in variations.Petiolar tomentum attachment status and petal shape were consis-tent with the mother's,and the leaf density,leaf shape,inflorescence attachment status tended to be biparental.Leaf density,leaf blade shape,inflorescence bearing status tended to be inherited from both parents,and the rest tended to be inherited from the father.As for fruit traits,soluble sugar and titratable acid were better than both parents,and the coefficient of variation of single fruit weight was 32.95％.Fruit surface colour and seed insertion status were consistent with both parents,and flavour and texture tended to be inherit-ed from the mother,while the rest tended to be inherited from the father.Diversity analysis showed that flavour(C14)had the highest diversity index and rich type of variation.Principal component analysis showed that the three principal components extracted were the first principal component(F1)chlorophyll and acidity factor,the second principal component(F2)appearance and sweetness factor,and the third principal component(F3)storage factor,and chlorophyll and soluble sugar contributed more to the composite model.In the comprehensive analysis,2022-9 showes good hybrid dominance,strong genetic transmission,rich genetic diversity,biological and fruit traits mainly shows high parental i.e.paternal inheritance,and high breeding value.