Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2021, Vol. 42 ›› Issue (2): 333-338.DOI: 10.3969/j.issn.1000-2561.2021.02.006

• Germplasm Resources, Genetics & Breeding • Previous Articles     Next Articles

Construction of Sugarcane F1 Population and Main Agronomic Traits Genetic Variation Analysis

XU Zhijun1, KONG Ran1, SU Junbo1, ZHOU Feng2, ZHANG Chuiming2, WU Xiaoli3, LIU Yang1,*()   

  1. 1. Zhanjiang Experiment Station, Chinese Academy of Tropical Agricultural Sciences / South Subtropical Crop Research Institute, Chinese Academy of Tropical Agricultural Sciences / Guangdong Engineering Technology Research Center for Dryland Water-saving Agriculture, Zhanjiang, Guangdong 524091, China
    2. Hainan Sugarcane Breeding Station, Guangzhou Sugarcane Industry Research Institute, Sanya, Hainan 572024, China
    3. Zhanjiang Academy of Agricultural Sciences, Zhanjiang, Guangdong 524094, China
  • Received:2020-02-18 Revised:2020-05-08 Online:2021-02-25 Published:2021-02-25
  • Contact: LIU Yang

Abstract:

Segregation population is an important basis for genetic linkage map construction, trait inheritance studying, key gene mining and germplasm resource innovated utilization. In this study, 209 seedlings derived from ‘Yacheng 94-46’ and ‘ROC 22’ were identified by SSR markers, and a F1 population were constructed containing 145 clones combined with filed evaluation. Traits genetic variation analysis of F1 population revealed that eight traits were quantitative traits controlled by multiple genes. The traits were transgressive segregation on both sides. The variation coefficients of the traits ranged from 9.23% to 56.78%, and the frequency distribution showed continuous normal distribution. Correlation analysis and stepwise regression analysis showed that sugarcane clump weight was positively correlated with plant height, stalk diameter and clump effective stalk number, with a determination coefficient of 0.92. And the content of sucrose was mainly determined by four factors including plant height, stalk diameter, brix and clump effective stalk number with a determination coefficient of 0.94. The results would lay a foundation for the genetic research on sugarcane F1 population and provide a reference for the determination of key selected traits in sugarcane breeding.

Key words: cultivated sugarcane, F1 population, agronomic traits, genetic variation

CLC Number: