Zhang Zexing, Xin Hongliang, Jiao Tianqi, Zhang Zhenhai, He Ping, Yang Zhihui, Zhu Jianbo, Liu Ruina
College of Life Sciences, Shihezi University, Shihezi, 832000, China.
Heliyon. 2024 Jul 14;10(14):e34603. doi: 10.1016/j.heliyon.2024.e34603. eCollection 2024 Jul 30.
Currently, heterosis is an effective method for achieving high crop quality and yield worldwide. Owing to the challenges of breeding and the high cost of the F1 generation, the F2 generation is considered the more desirable hybrid offspring for agricultural production. The use of OJIP fluorescence provides rapid insights into various photosynthetic mechanisms. However, OJIP fluorescence has not been previously studied as an indicator of the rate of heterosis. Consequently, we investigated the relationship between photosynthetic characteristics and growth and developmental parameters in hybrid cotton cultivars. The findings showed a gradual decline in the photosynthetic performance of hybrid cotton as the number of generations increased. In comparison to the F3 generation, both the F1 and F2 generations showed minimal variations in parameters, thus maintaining hybrid dominant and emphasizing the agricultural production potential of the F2 generation. The JIP-test revealed significant differences in the relationship between and parameters, as well as variations in the connections between the photo-response center and electron transfer efficiency, and between cotton yield and fiber quality in the hybrid progeny. These variations can serve as indicators for predicting the extent of hybrid dominance in cotton. The results indicated significant differences in the light and dark responses of the hybrid offspring. By using parents with similar photosynthetic performance as genetic resources for crossbreeding, the photosynthetic capacity of the hybrid progeny can be enhanced to facilitate the efficient absorption and conversion of light energy in crops.
目前，杂种优势是在全球范围内实现作物高品质和高产量的有效方法。由于育种面临的挑战以及F1代成本高昂，F2代被认为是农业生产中更理想的杂交后代。利用OJIP荧光能快速洞察各种光合机制。然而，此前尚未将OJIP荧光作为杂种优势率的指标进行研究。因此，我们研究了杂交棉花品种光合特性与生长发育参数之间的关系。研究结果表明，随着代数增加，杂交棉花的光合性能逐渐下降。与F3代相比，F1代和F2代在参数上的变化最小，从而保持了杂种优势，并突出了F2代的农业生产潜力。JIP测试揭示了杂交后代中 和 参数之间关系的显著差异，以及光反应中心与电子传递效率之间、棉花产量与纤维品质之间联系的变化。这些变化可作为预测棉花杂种优势程度的指标。结果表明杂交后代在光反应和暗反应方面存在显著差异。通过将光合性能相似的亲本作为杂交育种的遗传资源，可以提高杂交后代的光合能力，促进作物对光能的高效吸收和转化。
