中国农业科学 ›› 2024, Vol. 57 ›› Issue (1): 173-189.doi: 10.3864/j.issn.0578-1752.2024.01.012

• 园艺 • 上一篇    下一篇

早花露地小菊杂交后代株系的综合评价与筛选

宋想(), 王钟曼(), 张秋玲, 魏媛媛, 赵小刚, 刘波, 戴思兰()   

  1. 北京林业大学园林学院/北京市林木分子设计育种高精尖创新中心/花卉种质创新与分子育种北京市重点实验室/城乡生态环境北京实验室/林木花卉遗传育种教育部重点实验室/国家花卉工程技术研究中心,北京 100083
  • 收稿日期:2023-04-26 接受日期:2023-09-01 出版日期:2024-01-01 发布日期:2024-01-10
  • 通信作者:
    戴思兰,E-mail:
  • 联系方式: 宋想,E-mail:songxiangbjfu@163.com。王钟曼,E-mail:wangzhongman9801@163.com。宋想和王钟曼为同等贡献作者。
  • 基金资助:
    国家自然科学基金(32371948); 国家自然科学基金(32171849); 北京市科技计划(Z191100008519002)

Comprehensive Evaluation and Selection of Hybrid Offsprings of Early Flowering Spray Outdoor Chrysanthemum

SONG Xiang(), WANG ZhongMan(), ZHANG QiuLing, WEI YuanYuan, ZHAO XiaoGang, LIU Bo, DAI SiLan()   

  1. School of Landscape and Architecture, Beijing Forestry University/Beijing Advanced Innovation Center for Tree Breeding by Molecular Design/Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding/Beijing Laboratory of Urban and Rural Ecological Environment/Key Laboratory of Genetics and Breeding in Forest Tree and Ornamental Plants of Ministry of Education/National Engineering Research Center for Floriculture, Beijing 100083
  • Received:2023-04-26 Accepted:2023-09-01 Published:2024-01-01 Online:2024-01-10

摘要:

【目的】建立早花露地小菊综合评价体系,筛选出花期为9月中旬至10月中旬、花色接近纯正红色或黄色、花型和株型等综合表现优异的株系,丰富华北地区早秋节庆用花。为进一步培育早花露地小菊新品种提供育种材料和选择方法。【方法】以露地小菊3个早花亲本和1个重瓣性高且花色鲜艳亲本及其25个经田间初选的杂交后代无性株系为供试材料,划分花色、花期、花型、株型和叶型5个层次,从观测的30个原始性状中筛选出18个关键性状指标作为评价因子,利用层次分析法及K-Means聚类分析法建立综合评价体系,开展杂种株系的综合筛选。【结果】以早花、花型圆整丰满、红黄两种花色稳定为育种目标确定了层次分析法各性状的权重值,其中初花期起始时间(0.1817)权重值最大,其次是花色稳定性(0.1695)、盛花期单株着花数量(0.1383)、开花持续时间(0.1301),再次是花色适宜度(0.0565)、盛花期着花整齐度(0.0565)、花序直径(0.0539)、舌状花数量(0.0574)。通过K-Means聚类分析法将29份材料划分为3个等级,Ⅰ级10个(34.38%),Ⅱ级11个(37.93%),Ⅲ级8个(27.59%);杂交子代性状分离广泛,花色、花型和株型均出现了超亲性状,但花期仍以2个早花亲本初花期最早,符合前人研究认为花期为多基因控制的数量性状。因此,早花露地小菊育种仍需筛选更多亲本,增加可早秋使用的露地小菊资源。【结论】本评价方法综合各类评价体系优势,以数量化结果充分表征田间观测的性状特征,以育种目标为导向进行层次分析赋值评价,为综合评价和筛选早花露地小菊优良品种提供了量化方法。建立的评价体系可以很好地对早花露地小菊进行评价与筛选,为后期早花露地小菊新品种的选育提供了一种可靠方法,有助于提高后代优良种质筛选效率。最终筛选出10个观赏性状优良的早花露地小菊株系,可作为新品种或新品系应用,也可作为育种材料。

关键词: 露地小菊, 杂交后代, 综合评价, 层次分析法, K-Means聚类分析, 早花性状

Abstract:

【Objective】The aim of this study was to establish a comprehensive evaluation system for early flowering garden chrysanthemums, and to select plant lines with flowering periods from mid-September to mid-October, of which flower colors were close to pure red or yellow with novel flower type, round plant shape and excellent comprehensive performance to enrich ornamentals for early autumn festivals in Northen China, so as to provide breeding materials and selection methods for further breeding of early flowering garden chrysanthemum. 【Method】Using 3 early-flowering parents and 1 high double-flowering parent with bright color of small flowered chrysanthemum and 25 asexual hybrid progenies as test materials, 30 original traits were observed from 5 aspects, including flower color, flowering period, flower type, plant type, and leaf type. The selected 18 key traits were used as evaluation factors, and then a comprehensive evaluation system was established using Analytic Hierarchy Process and K-Means clustering analysis to conduct the comprehensive screening of hybrid lines. 【Result】The weight values of each trait of analytic hierarchy process were determined with the breeding objectives of early flowering, round flower type, and stable red and yellow flower color. Among them, the weight value of the initial flowering time (0.1817) was the largest, followed by the flower color stability (0.1695), the number of flowers per plant in the full flowering period (0.1383), the flowering duration (0.1301), the flower color suitability (0.0565), the flower uniformity in the full flowering period (0.0565 ), the inflorescence diameter (0.0539), and the number of ligulate flowers (0.0574). The 29 materials were divided into 3 grades by K-Means clustering analysis: 10 in grade I, 11 in grade II, and 8 in grade III, accounting for 34.38%, 37.93% and 27.59%, respectively. The traits of the hybrid progeny were widely separated, and the flower color, flower type, and plant type all showed transgressive traits, but the flowering period was still the earliest in the two early flowering parents, which was in line with the previous studies that the flowering period was a quantitative trait controlled by multiple genes. Therefore, the early flowering breeding still needs to screen parents and increase the resources of open-field small chrysanthemums that can be used in early autumn. 【Conclusion】 This evaluation method integrated the advantages of various evaluation systems, characterized the traits observed in the field with quantitative results, and conducted hierarchical analysis and evaluation guided by breeding objectives, which provided a quantitative method for comprehensive evaluation and screening of excellent varieties of early flowering garden chrysanthemum. The data analysis results indicated that the evaluation system established in this study could effectively evaluate and screen early flowering garden chrysanthemums, providing a reliable method for the breeding of new varieties of early flowering garden chrysanthemums, and helping to improve the efficiency of selecting excellent germplasm for future breeding project. Finally, 10 early flowering garden chrysanthemum strains with excellent ornamental traits were selected, which could be used as new varieties or strains and also as further breeding materials.

Key words: spray outdoor chrysanthemum, hybrid offsprings, comprehensive evaluation, analytic hierarchy process, K-Means cluster analysis, early flowering characters