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Abstract：
High species diversity, hybridization potential, broad geographical dispersal range and ornamental characteristics (i.e., attractive size, shape, structure, flowers, and evergreen) have fetched a good international market for Rhododendron. However, most species are restricted to specific geographic areas due to their habitat specificity in acidic soil and cold climates, resulting many species being classified under threat categories of the IUCN. In this review, advances in research on Rhododendron for improvement to floral display quality and stress resistance have been described. The low genetic barrier among species has created opportunities for extensive hybridization and ploidy alteration for introducing quality and adaptive traits during the development of new varieties. Recent technological advances have supported investigations into the mechanism of flower development, as well as cold tolerance and pathogen resistance mechanisms in the Rhododendron. However, most of the species have limited adaptability to drought, line-tolerance, pathogen resistance, and high-temperature conditions and this resistance ability present in few species largely remains unexplored. Additionally, the available genetic diversity and genomic information on species, and possibilities for their application in molecular breeding have been summarized. Overall, genomic resource data are scarce in the majority of the members of this genus. Finally, various research gaps such as genetic mapping of quality traits, understanding the molecular mechanism of quality-related traits and genomic assortment in Rhododendron members have been discussed in the future perspective section.
UNASSIGNED: The online version contains supplementary material available at 10.1007/s13205-024-04006-6.
UNASSIGNED: The online version contains supplementary material available at 10.1007/s13205-024-04006-6.
摘要：
物种多样性高,杂交潜力，广泛的地理分布范围和观赏特征(即，有吸引力的尺寸，形状,结构,鲜花,和常绿）为杜鹃花赢得了良好的国际市场。然而,由于它们在酸性土壤和寒冷气候中的栖息地特异性，大多数物种被限制在特定的地理区域，导致许多物种被归类为IUCN的威胁类别。在这次审查中,描述了杜鹃花改善花卉展示质量和抗逆性的研究进展。物种之间的低遗传障碍为新品种开发过程中广泛的杂交和倍性改变提供了机会，以引入质量和适应性性状。最近的技术进步支持了对花卉发育机制的研究，以及杜鹃花的耐寒性和抗病性机制。然而,大多数物种对干旱的适应性有限，线公差,病原体抗性，和高温条件以及这种在少数物种中存在的抵抗能力在很大程度上仍未被开发。此外,关于物种的可用遗传多样性和基因组信息，及其在分子育种中应用的可能性进行了总结。总的来说,在该属的大多数成员中，基因组资源数据很少。最后,各种研究空白，如质量性状的遗传作图，在未来的观点部分已经讨论了杜鹃花成员质量相关性状和基因组分类的分子机制。
■在线版本包含补充材料，可在10.1007/s13205-024-04006-6获得。
■在线版本包含补充材料，可在10.1007/s13205-024-04006-6获得。
