Developmental genetic analysis of fruit shape traits under different environmental conditions in sponge gourd (Luffa cylindrical (L) Roem. Violales, Cucurbitaceae)

Genetics and Molecular Biology

Sheng Zhang¹  Jin Hu¹  Shengchun Xu¹ 

[1] ,Zhejiang University College of Agriculture and Biotechnology Department of AgronomyHangzhou,China

关键词: fruit shape traits;    genetic analysis;    genetic variances;    Luffa cylindrical (L) Roem;   

DOI  :  10.1590/S1415-47572008000400017

来源: SciELO

【 摘 要 】

Analysis of genetic main effects and genotype × environment (GE) interaction effects for the fruit shape traits fruit length and fruit circumference in the sponge gourd (Luffa cylindrical (L) Roem. Violales, Cucurbitaceae) was conducted for diallel cross data from two planting seasons. A genetic model including fruit direct effects and maternal effects and unconditional and conditional variances analysis was used to evaluate the development of the fruit at four maturation stages. The variance analysis results indicated that fruit length and circumference were simultaneously affected by fruit direct genetic effects and maternal effects as well as GE interaction effects. Fruit direct genetic effects were relatively more important for both fruit shape traits during the whole developmental period. Gene activation was mostly due to additive effects at the first maturation stage and dominance effects were mainly active during the other three stages. The fruit shape trait correlation coefficients due to different genetic effects and the phenotypic correlation coefficients varied significantly for the various maturation stages. The results indicate that it is relatively easy to improve the two fruit shape traits for market purposes by carefully selecting the parents at the first maturation stage 3 days after flowering instead of at fruit economic maturation.

【 授权许可】

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