茶树插穗萌芽与生根特性的相关性研究OA
Study on the Correlation between Tea Cutting Germination and Rooting Characteristics
以30份茶树种质资源为材料开展扦插繁育试验,通过对茶树种质资源插穗4个萌芽特性、5个生根特性指标观察,分析研究茶树种质资源插穗萌芽与生根特性的相关性,探究茶树种质资源插穗腋芽萌芽特性对扦插生根繁育的影响.结果表明,30份茶树种质资源插穗萌芽与生根特性指标间存在一定差异,9个萌芽与生根特性指标的变异系数在0.73％～20.67％之间,研究材料具有多样性.相关性分析表明,在茶树种质资源萌芽特性指标间,插穗生长速率与腋芽生物量增长速率间相关系数最高,呈极强正相关,其余为中等或极弱相关.茶树种质资源生根特性指标间相关性更强,除平均根系数量与平均根系长度之间为中等正相关外,其余皆为强乃至极强正相关.在茶树种质资源萌芽与生根特性指标之间,只有插穗生根率与腋芽生长速率、腋芽生物量增长速率之间呈强正相关,此外为中等相关或更弱.依据载荷的高低,茶树种质资源插穗萌芽特性影响种质生根繁育特性主要性状顺序为:腋芽生物量增长速率＞腋芽生长速率＞插穗腋芽萌发率,即茶树插穗腋芽生物量增长越快、生长速率越快、腋芽萌发率越高对茶树生根影响越大.综上所述,不同茶树种质资源扦插繁育插穗腋芽萌发率、腋芽生长速率等指标差异明显,种质资源萌芽特性能显著影响种质生根特性,研究结果可为茶树优良品种(系)的繁育与选育提供理论依据.
The experiment was carried out with 30 tea resources as materials,and the correlation between axillary bud germination and rooting characteristics was studied by observing 4 germination characteristics and 5 rooting charac-teristics of cuttings from tea resources.Through genetic variation and correlation analysis,the relationship between cutting germination and rooting characteristics among tea resources was studied,and the effect of axillary bud ger-mination characteristics on rooting and tea propagation was explored.The results show that there were some differences between germination and rooting characteristics of 30 tea resources,and the genetic variation coefficients of 9 bud germination and rooting traits ranged from 0.71％to 20.67％.Correlation analysis shows that among the indicators of germination characteristics of tea resources,the correlation coefficient between the growth rate of cuttings and the growth rate of axillary bud biomass was the highest,which shows a strong positive correlation,while the rest were moderately or weakly correlated.The correlations between the rooting characteristics of tea resources were even stronger.Except for a moderate positive correlation between the average number of roots and the average root length,all other indicators were significantly or even highly significantly correlated.Among the indicators of germination and rooting characteristics of tea resources,only the rooting rate was significantly and positively correlated with the axillary bud growth rate and axillary bud biomass growth rate.The rest were moderately correlated or weaker.According to the load,the germination characteristics of tea cuttings affected the rooting and propagating characteristics of tea germplasm resources in the order of axillary bud growth rate＞biomass rate＞germination rate,which suggests the faster the axillary bud germination growth rate,the larger the biomass and the higher the germination rate,the greater the effect on tea rooting.In summary,there were significant differences in axillary bud germination rate and germination growth rate of cuttings in different tea resources,and the germination characteristics of tea resources could significantly affect the rooting characteristics.The research results could provide a theoretical basis for the breeding and selection of excellent cultivars(lines)of tea plants.
吉庆勇;周慧娟;疏再发;郑生宏;何卫中
丽水市农林科学研究院,浙江丽水 323000
农业科学
茶树种质资源萌芽特性根系生长特性扦插繁殖
teagermplasm resourcesgermination characteristicsrooting characteristicscutting propagation
《中国茶叶》 2024 (007)
33-40 / 8
国家现代农业产业技术体系(CARS-19)、浙江省农业(茶树)新品种选育重大科技专项(2021C02067-4-1、2021C02067-7-1)、丽水市公益性项目(2022GYX14)、2022年市级农科院联盟区域示范性项目(2022SJLM20)
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