Genetic analysis of kernel oil content and related traits in complete diallel progenies of Camellia oleifera
[Objective]The objective is to study the genetic variation patterns of oil-related traits in complete diallel progenies of Camellia oleifera,and to provide basis for parental selection in cross breeding.[Method]5x5 complete diallel hybridization(no self-crossbreeding)was carried out with 5 excellent clones of C.oleifera as parents,and the oil content,lignin,cellulose and hemicellulose contents of 20 hybrid families were determined.The correlation among traits was analyzed,the general combining ability of parents and the specific combining ability of hybrid combinations were determined,and the genetic variation rules among traits were analyzed.[Result]The kernel oil content of 20 families ranged from 252.30 to 537.08 mg·g-1,the lignin content was from 49.64 to 222.20 mg·g-1,the cellulose content was from 42.11 to 130.43 mg·g-1,and the hemicellulose content was from 3.72 to 111.96 mg·g-1.There were significant differences in oil,lignin,cellulose and hemicellulose contents of kernels among 20 families(P＜0.01),and there were significant correlations(P＜0.01)among the 4 traits.The correlation coefficient between oil content and lignin content was the highest(-0.47).Except for the specific combining ability of lignin content and reciprocal cross effect of oil content,the general combining ability,specific combining ability and reciprocal cross effect of the parents were significantly different(P＜0.01)in the 4 traits.Oil and hemicellulose contents of kernels were jointly controlled by additive and dominant effect,and dominant variance was greater than additive variance.The lignin content was mainly affected by additive effect and the cellulose content was mainly controlled by dominant effect.The broad-sense heritability of the 4 traits ranged from 7.86％to 14.03％,and the narrow-sense heritability was 0 to 14.03％,all of which were strongly influenced by environmental factors.[Conclusion]Based on the analysis of combining ability,2 excellent parents'Changlin No.4'and'Changlin No.40',as well as 2 excellent combinations'Changlin No.40'×'Changlin No.95'and'Changlin No.4'×'Changlin No.53'are selected.[Ch,8 tab.35 ref.]
万方数据
维普
