Analysis on genetic contribution of agronomic traits to total sugar in flue-cured tobacco (Nicotiana tabacum L.)

作者：Xiao B G; Zhu J^*; Lu X P; Bai Y F; Li Y P

来源：Field Crops Research, 2007, 102(2): 98-103.

DOI：10.1016/j.fcr.2007.03.002

• flue-cured tobacco
• Nicotiana tobacum L.
• diallel analysis
• genetic correlation
• conditional analysis

To uncover the genetic contributions of agronomic traits to content of total sugar (TS) and find indicator traits for indirect selection on TS in the flue-cured tobacco (Nicotiana tobacum L.), multivariable conditional analysis was conducted based on a genetic model containing additive-dominance and their interactions with environments. Fourteen cultivars (or breeding lines) and derived 41 F-1 crosses were grown at four locations in Yunnan province, China. Significant phenotypic contribution to TS was detected for six agronomic traits, plant height (PH), girth of stem (GS), internode length (INL), number of leaves (NL), length of middle leaves (LML) and width of middle leaves (WML). There was large contribution of additive effects due to each of the five agronomic traits (PH, GS, INL, LML and WML). The contribution ratio of dominance effect was high due to PH. By serving as high contributor of additive effects to TS and having high ratios of additive variance to phenotypic variance, INL and PH could be used as indicative agronomic traits for selecting breeding lines with suitable TS. Among the six agronomic traits, PH had the highest contribution to dominance effects of TS for most F, crosses, and could be used for selecting the crosses with suitable TS.

• 出版日期2007-6-5
• 单位浙江大学; 云南省烟草农业科学研究院