One thrust in increasing food security in Jamaica is expansion of cassava production. The multiple shoot removal technique (MSRT) for rapid propagation of cassava can help address limitations in planting material. Shoots sprouting from cuttings of hardwood stem are severed in such a way as to induce further sprouting, and then put to root for subsequent transfer to the field. The effects of age and fertilization of parent plants and nodal age of stems were studied. Six Colombian varieties were planted in fertilized and unfertilized field plots with similar growing conditions to provide stems for MSRT propagation. Volume of two-node cuttings increased from apical to basal nodal age, but cutting density was a better predictor of shoot production. On average, three to six viable shoots were produced per cutting over 3 months in a greenhouse. All nodal ages of stems from parent plants aged 6, 7 and 9 months were suitable if the quality of the planting stakes producing parent plants was adequate. If stake quality is uncertain, it is recommended that apical pieces are not used from parents younger than 9 months. The variety CM 6119-5 consistently produced most shoots, suggesting a strong genotypic effect, but other varieties, particularly CM 849, were less consistent, indicating the role of environmental interactions. The physiological status of cuttings as influenced by stem maturity, parent plant age, nutrition and growing conditions of both grandparent and parent stems was as important as genotypic characteristics in determining shoot production from two-node cuttings of cassava stem.

中文翻译：

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木薯多枝去枝快速繁殖技术生产枝条的效果

牙买加提高粮食安全的一个推动力是扩大木薯生产。用于木薯快速繁殖的多枝去除技术 (MSRT) 有助于解决种植材料的限制。从硬木茎的扦插中发芽的芽被切断以诱导进一步发芽，然后扎根以随后转移到田间。研究了亲本植物的年龄和受精以及茎节年龄的影响。六个哥伦比亚品种被种植在具有相似生长条件的施肥和未施肥田地中，为 MSRT 繁殖提供茎。两节扦插的体积从顶端到基部节龄增加，但扦插密度是枝条产量的更好预测指标。平均而言，在温室中的 3 个月内，每次切割会产生 3 到 6 个可行的枝条。如果生产亲本植物的种植桩的质量足够好，则所有年龄为 6、7 和 9 个月的亲本植物茎的节龄都是合适的。如果桩质量不确定，建议不要使用父母年龄小于 9 个月的根尖片。CM 6119-5 品种始终产生大多数芽，表明基因型效应很强，但其他品种，特别是 CM 849，一致性较差，表明环境相互作用的作用。受茎成熟、亲本植物年龄、营养和祖父母和亲本茎的生长条件影响的扦插生理状态与决定木薯茎双节扦插枝条产量的基因型特征一样重要。如果生产亲本植物的种植桩的质量足够，则适合 7 个月和 9 个月。如果桩质量不确定，建议不要使用父母年龄小于 9 个月的根尖片。CM 6119-5 品种始终产生大多数芽，表明基因型效应很强，但其他品种，特别是 CM 849，一致性较差，表明环境相互作用的作用。受茎成熟、亲本植物年龄、营养和祖父母和亲本茎的生长条件影响的扦插生理状态与决定木薯茎双节扦插枝条产量的基因型特征一样重要。如果生产亲本植物的种植桩的质量足够，则适合 7 个月和 9 个月。如果桩质量不确定，建议不要使用父母年龄小于 9 个月的根尖片。CM 6119-5 品种始终产生大多数芽，表明基因型效应很强，但其他品种，特别是 CM 849，一致性较差，表明环境相互作用的作用。受茎成熟、亲本植物年龄、营养和祖父母和亲本茎的生长条件影响的扦插生理状态与决定木薯茎双节扦插枝条产量的基因型特征一样重要。建议 9 个月以下的父母不要使用根尖片。CM 6119-5 品种始终产生大多数芽，表明基因型效应很强，但其他品种，特别是 CM 849，一致性较差，表明环境相互作用的作用。受茎成熟、亲本植物年龄、营养和祖父母和亲本茎的生长条件影响的扦插生理状态与决定木薯茎双节扦插枝条产量的基因型特征一样重要。建议 9 个月以下的父母不要使用根尖片。CM 6119-5 品种始终产生大多数芽，表明基因型效应很强，但其他品种，特别是 CM 849，一致性较差，表明环境相互作用的作用。受茎成熟、亲本植物年龄、营养和祖父母和亲本茎的生长条件影响的扦插生理状态与决定木薯茎双节扦插枝条产量的基因型特征一样重要。