https://www.ahs.ac.cn/images/0513-353X/images/top-banner1.jpg|#|苹果
https://www.ahs.ac.cn/images/0513-353X/images/top-banner2.jpg|#|甘蓝
https://www.ahs.ac.cn/images/0513-353X/images/top-banner3.jpg|#|菊花
https://www.ahs.ac.cn/images/0513-353X/images/top-banner4.jpg|#|灵芝
https://www.ahs.ac.cn/images/0513-353X/images/top-banner5.jpg|#|桃
https://www.ahs.ac.cn/images/0513-353X/images/top-banner6.jpg|#|黄瓜
https://www.ahs.ac.cn/images/0513-353X/images/top-banner7.jpg|#|蝴蝶兰
https://www.ahs.ac.cn/images/0513-353X/images/top-banner8.jpg|#|樱桃
https://www.ahs.ac.cn/images/0513-353X/images/top-banner9.jpg|#|观赏荷花
https://www.ahs.ac.cn/images/0513-353X/images/top-banner10.jpg|#|菊花
https://www.ahs.ac.cn/images/0513-353X/images/top-banner11.jpg|#|月季
https://www.ahs.ac.cn/images/0513-353X/images/top-banner12.jpg|#|菊花

Acta Horticulturae Sinica ›› 2023, Vol. 50 ›› Issue (10): 2104-2116.doi: 10.16420/j.issn.0513-353x.2022-0465

• Genetic & Breeding · Germplasm Resources · Molecular Biology • Previous Articles     Next Articles

Genetic Performance of Photoreaction Cycle in F1 Generation of Cut Chrysanthemum

YUAN Chucong, SU Jiangshuo, JIANG Jiafu, DENG Bo, ZHANG Fei, GUANG Zhiyong, FANG Weimin, CHEN Fadi*()   

  1. State Key Laboratory of Crop Genetics and Germplasm Enhancement/Key Laboratory of Landscping,Ministry of Agriculture and Rural Affairs/Key laboratory of Biology of Ornamental Plants in East China,National Forestry and Grassland Administration,College of Horticulture,Nanjing Agricultural University,Nanjing 210095,China
  • Received:2023-02-16 Revised:2023-06-26 Online:2023-10-25 Published:2023-10-30

Abstract:

The photoreaction cycle,a very important trait in the production of cut chrysanthemums(Chrysanthemum morifolium Ramat.),refers to the number of days for them to start from short sunshine and to reach the initial blooming state. Six chrysanthemum cultivars with larger differences in photoreaction cycle were selected as parents and produced 3 hybrid combinations,namely:‘Q-17’בLühuang Hongbian’(combination Ⅰ),‘Nannong Luhuo’בMini Huang’(combination Ⅱ),‘Q1-39’בHeixinhuang’(combination Ⅲ),386,208 and 181 F1 offspring were obtained from the three combinations,respectively. In the three combinations,the coefficient of variation of the photoresponse cycle was 5.85%,10.94% and 8.76%,and the coefficient of variation of the 5 traits of budding period,color developing period,plant height,internode length and number of leaves was from 6.27% to 27.21%,the mid-parental dominance of the photoreaction cycle in the three combinations of F1 populations were 5.81,6.88 and 9.69,respectively;while the other 5 traits,except for the insignificant high-to-high parental dominance of the combination Ⅲ,all were extremely significant. Positive and negative pro-predominance. The mixed genetic model analysis revealed that there were differences in the genetic models of the photoreaction cycle,the budding period and the color developing period among the three combinations. The photoreaction cycle conformed to the A-1 model in the combination I,and the heritability of the main gene is 50.4%;in the combination Ⅱ,it conforms to the A-0 model,without the control of the main gene;in the combination Ⅲ,it conforms to the B-1 model,and the heritability of the main gene It is 84.93%,which belongs to high heritability. Taken together,the photoreaction cycle is a complex quantitative trait,and its heritability varies greatly among different combinations.

Key words: cut chrysanthemum, photoreaction cycle, heterosis, mixed genetic analysis