广西壮族自治区农业科学院园艺研究所/农业农村部南宁南亚热带果树科学观测实验站,南宁 530007
研究方向为火龙果种质资源与遗传育种,E-mail: wzj201688@163.com;
陆贵锋,研究方向为火龙果遗传育种,E-mail: 122447160@qq.com
国家自然科学基金(31960578);广西自然科学基金项目(2022GXNSFAA035612);广西农业科学院基本科研业务专项资助项目(桂农科2023YM72)
Horticultural Research Institute, Guangxi Academy of Agricultural Sciences / Nanning Investigation Station of South Subtropical Fruit Trees, Ministry of Agriculture and Rural Affairs, Nanning 530007
Foundation projects: National Natural Science Foundation of China (31960578); Guangxi Natural Science Foundation (2022GXNSFAA035612);Fundamental Research Project of Guangxi Academy of Agricultural Sciences (Gui Nong Ke 2023YM72)
为探明与火龙果裂果性相关的果实性状,以279份火龙果种质资源为供试材料,对单果重、果实纵径、果实横径、果形指数、果脐直径、果脐深度、果脐形状指数、果皮厚度、果脐果萼长度、果萼数量、可食率、果肉中心可溶性固形物含量、果肉边缘可溶性固形物含量等13个果实性状与裂果率进行遗传变异分析、相关性分析和多元回归分析。结果表明:13个果实性状和裂果率均存在丰富的遗传变异。相关性分析发现裂果率与果脐形状指数的相关系数最大且呈极显著负相关;裂果率与果形指数和果皮厚度存在显著负相关,而与可食率和果肉边缘可溶性固形物含量呈现显著正相关。进一步多元线性回归分析表明,果脐直径和果脐深度是影响裂果率的最主要因素,共解释裂果率39.30%的变异,而其他果实性状均不能显著影响裂果率。综上可知,果脐形态结构对火龙果的裂果性较为重要,在耐裂果育种中果脐形状指数可作为一个参考指标。
In order to explore the fruit traits that associate to the fruit cracking in pitaya (Hylocereus spp.), 279 pitaya accessions were used as experimental materials in this study. Genetic variation analysis, correlation analysis and multiple regression analysis were performed at 13 fruit traits including individual fruit weight, fruit longitudinal diameter, fruit transversal diameter, fruit shape index, fruit navel diameter, fruit navel depth, fruit navel shape index, skin thickness, fruit bract length in fruit navel, number of fruit bracts, fruit edible rate, soluble solid content (SSC) of central pulp, and pulp margin SSC with fruit cracking rate. The results reveled abundant genetic variations at 13 fruit traits and fruit cracking rate. By the correlation analysis, the correlation coefficient between fruit cracking rate and fruit navel shape index was the largest, showing a highly significant negative correlation. Fruit cracking rate was negatively correlated with fruit shape index and skin thickness, but positively correlated with edible rate and pulp margin SSC. The multiple linear regression analysis showed that fruit navel diameter and navel depth were the two most important factors affecting fruit cracking rate, accounting for 39.30% of the variation. No significance was detected at other fruit traits to fruit cracking rate. Collectively, the morphological structure of the fruit navel is of importance to the fruit cracking of pitaya, and the fruit navel shape index can be used as a reference index in breeding of cracking tolerance varieties.
武志江,黄凤珠,韦蒴曈,等.火龙果种质资源果实性状与裂果性相关分析[J].植物遗传资源学报,2024,25(1):52-59.
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