Expression of heterosis in photosynthetic traits in F1 generation of sorghum (Sorghum bicolor) hybrids and relationship with yield traits
文献类型： 外文期刊
作者： Zhao, Renjie 1 ; Li, Yueqiao 2 ; Xu, Chen 2 ; Zhang, Zhian 1 ; Zhou, Ziyang 2 ; Zhou, Yihan 3 ; Qi, Zexin 1 ;
作者机构： 1.Jilin Agr Univ, Coll Agr, Changchun 130118, Peoples R China
2.Jilin Acad Agr Sci, Changchun 130033, Peoples R China
3.Jilin Engn Vocat Coll, Siping 136001, Peoples R China
关键词： carbon metabolising enzymes; F1 generation; heterosis; hybridisation method; photosynthesis; plant materials; sorghum; yield
期刊名称：FUNCTIONAL PLANT BIOLOGY （ 影响因子：2.7； 五年影响因子：3.0 ）
ISSN： 1445-4408
年卷期： 2024 年 51 卷 9 期
页码：
收录情况： SCI
摘要： Heterosis is a crucial factor in enhancing crop yield, particularly in sorghum (Sorghum bicolor). This research utilised six sorghum restorer lines, six sorghum sterile lines, and 36 hybrid combinations created through the NCII incomplete double-row hybridisation method. We evaluated the performance of F1 generation hybrids for leaf photosynthesis-related parameters, carbon metabolism-related enzymes, and their correlation with yield traits during the flowering stage. Results showed that hybrid sorghum exhibited significant high-parent heterosis in net photosynthetic rate (P-n), transpiration rate (T-r), stomatal conductance (G(s)), apparent leaf meat conductance (AMC), ribulose-1,5-bisphosphate (RuBP) carboxylase, phosphoenolpyruvate (PEP) carboxylase, and sucrose phosphate synthase (SPS). Conversely, inter-cellular carbon dioxide concentration (C-i), instantaneous water uses efficiency (WUE), and sucrose synthase (SuSy) displayed mostly negative heterosis. Traits such as 1000-grain weight (TGW), grain weight per spike (GWPS), and dry matter content (DMC) exhibited significant high-parent heterosis, with TGW reaching the highest value of 82.54%. P-n demonstrated positive correlations with T-r, C-i, G(s), RuBP carboxylase, PEP carboxylase, GWPS, TGW, and DMC, suggesting that T-r, C-i, and G(s) could aid in identifying high-photosynthesis sorghum varieties. Concurrently, P-n could help select carbon-efficient sorghum varieties due to its close relationship with yield. Overall, the F1 generation of sorghum hybrids displayed notable heterosis during anthesis. Combined with field performance, P-n at athesis can serve as a valuable indicator for early prediction of the yield potential of the F1 generation of sorghum hybrids and for screening carbon-efficient sorghum varieties.
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