| 摘要: |
| 为了研究沿海防护林碳汇优势树种短枝木麻黄 Casuarina equisetifolia 水培生根能力的遗传变异，以短枝木麻黄4个天然分布或引种区（澳洲天然分布区、亚洲天然分布区、亚洲引种区和非洲引种区）内10个国家的21个种源共70个家系的种子苗嫩枝为材料，开展生根能力差异的比较研究。结果表明，短枝木麻黄嫩枝水培生根能力在区域间、国家间差异显著，在种源间、家系间差异极显著, 其中生根能力最强的种源为肯尼亚次生种源18142，生根率高达95.2%，最弱的种源为中国次生种源18269，生根率仅为46.7%。生根率、生根数和根长之间无线性相关性，短枝木麻黄生根能力评价应以生根率为主要指标。 |
| 关键词: 短枝木麻黄 嫩枝水培 生根能力 差异分析 |
| DOI： |
| 分类号: |
| 基金项目:基金项目：省级温室气体清单编制项目（STQH-2021-050），林业科技创新项目（2018KJCX011），省级生态公益林效益补偿资金省统筹项目（2020STC-03） |
|
| Vegetative Twig Rooting Ability Variation of Different Provenances and Families of Casuarina equisetifolia |
|
weilong1, ZHOU YI1, ZHANG Yong2, WEI Yongcheng2, MENG Jingxiang2
|
|
1.Guangdong Academy of Forestry;2.Research Institute of Tropical Forestry, CAF
|
| Abstract: |
| Twigs of 70 families within 21 natural provenances or land races of Casuarina equisetifolia originated from 10 countries of 4 intercontinental regions (Oceania natural, Asia natural, Asia introduced, Africa introduced) were sampled for rooting ability comparison using vegetative water-culture propagation technique, aimed to reveal the rooting ability variation of different seed sources of C. equisetifolia. Main results were summarized as follows: there were very significant differences at rooting ability between families and between provenances, as the provenance Kenya land race 18142 with strongest rooting ability reached 95.2% rooting rate, but the one China land race 18269 with poorest rooting ability only had 46.7% rooting rate. No correlationship was found among the 3 measurement parameters, namely rooting rate, root number and root length related to rooting ability of C. equisetifolia. Therefore, rooting rate should be considered the main property of rooting ability when implementing clone selection and breeding of C. equisetifolia. |
| Key words: Casuarina equisetifolia cutting water-culture rooting ability variance analysis |
