热带作物学报2025，Vol.46Issue(3)：648-661,14.DOI:10.3969/j.issn.1000-2561.2025.03.013
甘蔗及其近缘种质斑茅和割手密不同生长角度根系分布及宿根性分析
Analysis of Root Distribution at Different Growth Angles and Ra-tooning Characteristic in Sugarcane and Its Related Germplasms Erianthus arundinaceus and Saccharum spontaneum
摘要
Abstract
The study was aimed to explore the relationship between the root distribution at different growth angles and the ratooning ability in sugarcane,and to screen the iconic root indexes of strong ratooning in sugarcane.Three sugar-cane varieties with different ratooning ability,Yunzhe 08-1609(A),Yunzhe 05-51(B),Yuetang 93-159(C)and strong ratooning sugarcane germplasm Erianthus arundinaceus(D)and Saccharum spontaneum(E),were used as the materials.The root morphology of plant and ratoon crops was continuously measured under the conditions of conventional plant-ing in field.The root biomass and quantity of sugarcane varieties with strong ratoon ability increased continuously dur-ing elongation stage of plant crop,and the highest was in the angle range 0°-30° from the vertical direction,followed by that of 30°-45°.The root biomass and numbers in ratoon crop were significantly higher than those in plant crop.The root biomass and numbers in varieties A and B were the highest in the angle range 30°-45°,and that in variety C was the highest in 45°-65°.The root biomass in E.arundinaceus and S.spontaneum was much higher than that in sugarcane varieties in both plant and ratoon crops,the root number in S.spontaneum was the largest while that in E.arundinaceus was close to that in sugarcane varieties.The root biomass of the two wild germplasm materials in plant crop was the highest in the angle range of 0°-30°,while in ratoon crop,the root number distribution in E.arundinaceus was similar at three angle ranges,and of whitch in S.spontaneum was similar in the ranges of 30°-45° and 45°-65°.The root number in variety A was the highest(46.43%)in the angle range of 0°-30° at late elongation stage of plant crop,followed by the range of 30°-45°(42.74%)at late elongation stage of ratoon crop.The root number proportion of S.spontaneum and E.arundinaceus was the highest in the range of 0°-30° at elongation stage of plant crop,followed by the range 45°-65° at elongation stage of ratoon crop.The top five indicators correlated with the ratooning ability were the root surface area,root volume,root length,root fresh weight,and root number within the angle range of 0°-30° to the vertical direction.For evaluating the ratooning ability of sugarcane,it is suggested to refer to the root index in the angle range of 0°-30° from the vertical direction in plant crop,and the root fresh weight could be used as a key index for preliminary screen-ing of the ratooning ability.In addition,if there was no rhizomes,the ratooning ability can be predicted by the ratio of average single root weight in ratoon to that in plant crop.关键词
甘蔗/宿根性/生长角度/根鲜质量/根系生物量/根数量Key words
sugarcane/ratooning ability/angle of root growth/root fresh weight/root biomass/roots number分类
农业科技引用本文复制引用
匡自有,刀静梅,杨绍林,艾静,王禹童,张仲富,李如丹,邓军,赵勇..甘蔗及其近缘种质斑茅和割手密不同生长角度根系分布及宿根性分析[J].热带作物学报,2025,46(3):648-661,14.基金项目
云南省基础研究专项面上项目(No.202201AT070285) （No.202201AT070285）
中央引导地方科技发展项目(No.202307AD110002) （No.202307AD110002）
国家糖料产业技术体系岗位科学家项目(No.CARS-170205). （No.CARS-170205）
