Wickramasinghe Kamal Priyananda, Kong Chun-Yan, Lin Xiu-Qin, Zhao Pei-Fang, Mehdi Faisal, Li Xu-Juan, Liu Xin-Long, Mao Jun, Lu Xin
National Key Laboratory for Biological Breeding of Tropical Crops, Kunming, Yunnan, China.
Yunnan Sugarcane Research Institute, Yunnan Academy of Agricultural Sciences, Yunnan Key Laboratory of Sugarcane Genetic Improvement, Kaiyuan, Yunnan, China.
Heliyon. 2024 Mar 26;10(7):e28531. doi: 10.1016/j.heliyon.2024.e28531. eCollection 2024 Apr 15.
Improvement of sugarcane is hampered due to its narrow genetic base, and the difficulty in synchronizing flowering further hinders the exploitation of the genetic potential of available germplasm resources. Therefore, the continuous evaluation and optimization of flowering control and induction techniques are vital for sugarcane improvement. In view of this, the review was conducted to investigate the current understanding of photoperiodic and lighting treatment effects on sugarcane flowering and its genetic regulation. Photoperiod facilities have made a significant contribution to flowering control in sugarcane; however, inductive photoperiods are still unknown for some genotypes, and some intended crosses are still impossible to produce because of unresponsive varieties. The effectiveness of lower red/far-red ratios in promoting sugarcane flowering has been widely understood. Furthermore, there is vast potential for utilizing blue, red, and far-red light wavelengths in the flowering control of sugarcane. In this context, light-emitting diodes (LEDs) remain efficient sources of light. Therefore, the combined use of photoperiod regimes with different light wavelengths and optimization of such treatment combinations might help to control and induce flowering in sugarcane parental clones. In sugarcane, () orthologues from to have been identified, and interestingly, has evidently been identified as a floral inducer in sugarcane. However, independent assessments of different FT-like gene family members are recommended to comprehensively understand their role in the regulation of flowering. Similarly, we believe this review provides substantial information that is vital for the manipulation of flowering and exploitation of germplasm resources in sugarcane breeding.
甘蔗遗传基础狭窄，阻碍了其品种改良，而花期同步困难进一步限制了现有种质资源遗传潜力的挖掘。因此，持续评估和优化花期调控与诱导技术对甘蔗品种改良至关重要。鉴于此，本综述旨在探究目前对于光周期和光照处理对甘蔗开花及其遗传调控影响的认识。光周期设施对甘蔗花期调控贡献显著；然而，部分基因型的诱导光周期仍不明确，且由于品种无响应，一些预期杂交仍无法实现。较低的红/远红比例促进甘蔗开花的有效性已得到广泛认知。此外，在甘蔗花期调控中利用蓝光、红光和远红光波长具有巨大潜力。在此背景下，发光二极管（LED）仍是高效光源。因此，将不同光波长的光周期方案结合使用并优化此类处理组合，可能有助于调控和诱导甘蔗亲本无性系开花。在甘蔗中，已鉴定出从 到 的（）直系同源基因，有趣的是，已明确 将 鉴定为甘蔗中的一种成花诱导因子。然而，建议对不同的FT类基因家族成员进行独立评估，以全面了解它们在开花调控中的作用。同样，我们认为本综述提供了重要信息，对甘蔗育种中花期调控和种质资源利用至关重要。
