Erianthus species have potential as breeding materials for sugarcane and as a biomass crop for fiber production. However, limited information about their genetic variation in agronomic traits hinders their practical utilization. Thus, in this study, we evaluated genetic variation and genetic correlations among 11 agronomic traits in plants grown as multiple-ratoon crops (plant crop to the third ratoon crop) for 98 clones of E. arundinaceus and 32 clones of E. procerus collected across Thailand. Among the clones tested, large genetic variation was observed in the 4-yr average, range, and genetic coefficient of variation of dry matter yield for both E. arundinaceus (12.1, 2.2 to 30.6 kg stool⁻¹, and 41.7%, respectively) and E. procerus (8.0, 2.7 to 16.3 kg stool⁻¹, and 25.5%, respectively). Many clones provided better dry matter yield and lower yield reductions in ratoon crops than a sugarcane cultivar (Saccharum spp. hybrid, 5.2 kg stool⁻¹) and Napier grass (Pennisetum purpureum, 6.6 kg stool⁻¹). Genetic variation was observed for stalk number, stalk length, stalk diameter, single stalk weight, Brix, dry matter content, and proportions of both pith and stem parts in stalks, which are important traits in sugarcane breeding. The dry matter yield showed the highest genetic correlation with stalk number (.958 in E. arundinaceus and .700 in E. procerus). Based on the results, clones with various combinations of advantageous traits were identified as promising genetic resources. These results provide important agronomic information that can be used to exploit this Erianthus germplasm for sugarcane improvement and fiber production in Thailand.

中文翻译：

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泰国多种宿根植物下毛竹种质农艺性状的遗传变异

Erianthus物种具有作为甘蔗育种材料和纤维生产的生物质作物的潜力。然而，关于它们的农艺性状遗传变异的信息有限，阻碍了它们的实际应用。因此，在本研究中，我们评估了 98 个 E. arundinaceus 无性系和 32 个 E. procerus 无性系的 98 个E. arundinaceus无性系和 32 个E. procerus的11 个农艺性状之间的遗传变异和遗传相关性。泰国。在测试的无性系中，在两种E. arundinaceus（12.1、2.2 至 30.6 kg 粪便^-1，分别为 41.7%）和E. procerus（分别为 8.0、2.7 至 16.3 kg 粪便^-1和 25.5%）。与甘蔗品种（ Saccharum spp. hybrid, 5.2 kg 粪便^-1）和龙皮草（Pennisetum purpureum，6.6 kg 粪便^-1 ）相比，许多无性系在宿根作物中提供了更好的干物质产量和更低的产量降低。在甘蔗育种中观察到茎数、茎长、茎粗、单茎重、白利糖度、干物质含量以及茎髓和茎部比例的遗传变异，这些是甘蔗育种的重要性状。干物质产量与茎数的遗传相关性最高（E. arundinaceus为 0.958，E. arundinaceus为 0.700E. procerus）。根据结果​​，具有各种优势性状组合的无性系被确定为有前景的遗传资源。这些结果提供了重要的农艺信息，可用于利用这种毛花种质在泰国进行甘蔗改良和纤维生产。