Karyotype Analysis of Three Varieties of Red Leaf Beet

2018 4th International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Sun, Bo^1 ; Tian, Yuxiao^1 ; Xia, Xue^1 ; Zhang, Fen^1 ; Tang, Haoru^1

College of Horticulture, Sichuan Agricultural University, Chengdu

611130, China^1

关键词: Genetic variability;    Karyotype analysis;    Leaf vegetables;    Relative length;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/252/2/022017/pdf
DOI  :  10.1088/1755-1315/252/2/022017

来源: IOP

【 摘 要 】

Red leaf beet was one of the most important leaf vegetables and an ornamental with rich pigment. However, there is a lack of information on genetic variability. In this study, cytological parameters on three varieties of red leaf beet were obtained. The results displayed that the average arm ratio of RR1 was determined 1.52 and relative length was ranged from 9.26% to 13.10%. The karyotype asymmetry index was 59.93%, and the karyotype formula was 2n=2x=18=14m+4sm (2SAT). The average arm ratio of RR2 was determined 1.50 and relative length was ranged from 8.57% to 13.11%. The karyotype asymmetry index was mensurated as 59.60%, and the karyotype formula was 2n=2x=18=14m (2SAT) +4sm. The average arm ratio of RR3 was determined 1.33 and relative length was ranged from 9.44% to 12.56%. The karyotype asymmetry index was 56.85%, which was much lower than RR1 and RR2, and the karyotype formula was 2n=2x=18=18m (2SAT). Although RR3 had an obvious difference with RR1 and RR2, the karyotype characteristics of three varieties of red leaf beet were all type 1A. This research revealed the karyotypic characteristics of red leaf beet. The results indicated that there was an obvious difference among the three varieties of red leaf beet in karyotypic characteristics, and the evolution of red leaf beet was relatively primitive.