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JIPB | 郑州大学商海红/袁有禄团队发表综述文章: 陆地棉纤维长度的遗传调控

  • 2026-06-21 05:53:57
JIPB | 郑州大学商海红/袁有禄团队发表综述文章: 陆地棉纤维长度的遗传调控

棉花 (Gossypium spp.) 在全球农业和纺织业中具有核心地位, 是全球重要的农业产品和工业原料每年为世界经济贡献超过6,000亿美元。它直接和间接地支撑着全球超过3.5亿人的生计。棉纤维是棉花的主要产品其在纺织工业中的占比达到全球纤维总量的35%以上。棉纤维的品质主要由其长度、强度、马克隆值和整齐度等因素共同决定这些属性决定了产品的耐用性、质地和商业价值。从结构特征来看棉纤维是胚珠表皮衍生的单细胞毛状体。这种极佳的模型系统已被广泛应用于研究植物细胞的伸长与分化过程。其发育过程可分为四个关键阶段: 起始阶段 (开花后0–3天DPA)、伸长阶段 (220 DPA)、次生细胞壁合成阶段 (1545 DPA) 和成熟阶段 (4050 DPA)。其中伸长阶段尤为关键它不仅决定了纤维的伸长速率和持续时间更直接决定了纤维的最终长度。这一发育过程为深入探讨纤维伸长的遗传调控机制提供了重要的研究基础。

近日, JIPB在线发表了郑州大学农业与生物制造学院商海红/袁有禄团队的题为“Recent advances in genetic control of fiber length in upland cotton”的综述文章 (https://doi.org/10.1111/jipb.70213)。该文章系统总结影响棉花纤维长度的基因并根据基因功能将其分为六大门类: 植物激素相关基因; 转录因子相关基因; 纤维素、木质素和蔗糖相关基因; 脂质相关基因; 细胞骨架相关基因; 其他功能多样的基因。

植物激素通过调控转录因子的活性或表达水平进而影响下游基因的表达最终决定纤维的长度。例如赤霉素介导的GhSLR1降解会破坏其与转录因子GhBLH1的相互作用从而释放GhBLH1以激活下游基因。随后GhBLH1直接激活GhFAD7A-1的表达促进亚麻酸积累最终促进棉花纤维细胞伸长。作者通过整合这些基因功能及其调控关系构建了影响棉花纤维长度的遗传调控网络以及不同激素之间通过相互作用进而影响棉花纤维长度的互作网络 (图1)并对这些基因在育种当中的应用进行了展望。以及在育种应用可能遇到的问题进行了讨论。

近年来基因组学和分子生物学的快速发展促进了众多与棉花纤维长度相关基因的克隆和功能鉴定为棉花纤维品质改良提供了宝贵的遗传资源。然而将这些发现应用于育种计划仍面临诸多挑战。

1. 田间试验缺乏: 例如虽然GhROP6的过表达在受控环境中能促进纤维伸长但田间试验表明过表达GhROP6的转基因棉花植株的纤维长度显著短于预期。基础研究与实际应用之间的差距可能源于同一基因对纤维长度的影响在不同棉花遗传背景中存在差异。因此有必要在不同的种质资源中评估已克隆的纤维长度基因。

2. 尚不明确的分子机制: 尽管许多这些基因的功能已得到验证但它们调控纤维伸长的精确分子机制仍未解析。例如尽管已证明GhMYB5_A12会影响纤维长度但其下游靶标和调控长度决定的调节网络仍不明确。深入理解这些机制对于优化其在育种中的应用至关重要。 
3. 纤维品质性状之间的拮抗关系: 虽然纤维长度和纤维强度通常呈正相关但某些基因对这些性状表现出拮抗作用。例如降低GhWRKY40的表达可增加纤维长度但会降低纤维强度; 而GhCOBL9的过表达则会抑制纤维伸长同时增加纤维强度。这些发现不仅揭示了棉花纤维发育的复杂遗传调控机制也揭示了一个关键挑战: 如何调和拮抗基因效应以实现纤维长度和强度的均衡提升。
4. 产量与品质间的此消彼长: 初步研究表明纤维品质性状与产量构成因素在遗传上呈负相关。例如GhROP6的过量表达虽然促进了纤维伸长但却降低了皮棉产量。为了应对这些挑战对基因功能和相互作用进行系统探索至关重要。
5. 环境适应性: 尽管棉花是一种亚热带植物自然生长在干燥和炎热的环境中但当长期暴露于温度胁迫和干旱等环境压力时其纤维长度会受到显著影响。随着全球变暖导致热浪频率和持续时间的增加在这些极端条件下保持棉花纤维的质量变得越来越具有挑战性。因此鉴定出使棉花能够在极端环境中保持正常纤维伸长的基因对于有效应对这些挑战至关重要。
生长素、赤霉素、独脚金内酯和乙烯在纤维伸长调控中的复杂相互作用
郑州大学农业与生物制造学院商海红研究员和袁有禄研究员为论文的通讯作者。郑州大学农业与生物制造学院讲师李刚岭为论文第一作者。郑州大学农业与生物制造学院硕士研究生王涛中国农业科学院棉花研究所副研究员龚举武助理研究员闫浩亮在读博士生姚淑倩参与了文献收集工作。该研究得到了河南省重点研发项目和河南省科技研发计划的资助。
文章引用:

Li, G., Wang, T., Yao, S., Yan, H., Gong, J., Yuan, Y., Shang, H. (2026). Recent advances in genetic control of fiber length in upland cotton. J. Integr. Plant Biol.https://doi.org/10.1111/jipb.70213

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  1. CONNECT:[ UseTime:0.000592s ] mysql:host=127.0.0.1;port=3306;dbname=i460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000820s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000307s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000273s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000519s ]
  6. SELECT * FROM `set` [ RunTime:0.000201s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000596s ]
  8. SELECT * FROM `article` WHERE `id` = 555106 LIMIT 1 [ RunTime:0.000473s ]
  9. UPDATE `article` SET `lasttime` = 1783739908 WHERE `id` = 555106 [ RunTime:0.012518s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000324s ]
  11. SELECT * FROM `article` WHERE `id` < 555106 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000513s ]
  12. SELECT * FROM `article` WHERE `id` > 555106 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000408s ]
  13. SELECT * FROM `article` WHERE `id` < 555106 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000766s ]
  14. SELECT * FROM `article` WHERE `id` < 555106 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000824s ]
  15. SELECT * FROM `article` WHERE `id` < 555106 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000857s ]
0.093660s