Acta Agriculturae Zhejiangensis ›› 2022, Vol. 34 ›› Issue (8): 1582-1590.DOI: 10.3969/j.issn.1004-1524.2022.08.02

• Crop Science • Previous Articles     Next Articles

Influences of cadmium stress on seedling growth of different sweet corn inbred lines and screening of associated molecular markers via simple sequence repeats

JIANG Haoliang1,2(), HUANG Yun1, LIANG Shaofang1,2, XIE Mengchen1,2, XU Tiancheng1, SONG Zhiting1,2, XIANG Wenwen1,2, CHEN Qingchun1,2, WAN Xiaorong1,2, SUN Wei1,2,*()   

  1. 1. College of Agriculture & Biology, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
    2. Guangzhou Key Laboratory for Research and Development of Crop Germplasm Resources, Guangzhou 510225, China
  • Received:2021-09-21 Online:2022-08-25 Published:2022-08-26
  • Contact: SUN Wei

Abstract:

In order to explore the responses of different sweet corn inbred lines to cadmium at seedling stage and to screen molecular markers associated with these responses, 13 sweet corn inbred lines were treated with 0.01 mol·L-1 cadmium, comprehensive evaluation of these sweet corn inbred lines was carried out based on physiological indexes, and the associated molecular makers were identified via genomic simple sequence repeats (SSR) markers. It was shown that KY188 and M114A were sensitive materials, and T96-4, M3, T35 and T8-1 were tolerant materials by Cd tolerance analysis. Compared with the control (without Cd), the chlorophyll content of KY188 (Cd sensitive inbred line) treated with Cd significantly (P<0.05) decreased with time, and its plant height, root number, root length, fresh weight of shoot, dry weight of shoot, fresh weight of root, dry weight of root, total fresh weight of plant, total dry weight of plant were significantly (P<0.05) decreased by 18.87%, 24.32%, 21.13%, 58.86%, 2.04%, 33.77%, 26.11%, 47.11% and 14.29%, respectively. However, the tolerant inbred line T96-4 showed no significant changes in the above indexes after Cd treatment. Through correlation analysis, 9 SSR markers were screened out on the 2nd, 3rd, 4th, 5th, 6th, 8th, 9th and 10th chromosome.

Key words: cadmium stress, principal component analysis, cadmium tolerance, simple sequence repeats (SSR) molecular markers, sweet corn

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