Cadmium accumulation characteristics of F1 hybrids by reciprocal hybridizing of Solanum nigrum in two climate-ecology regions.
Different ecotypes of crop hybridization can produce heterosis effects and have wide applications in plant breeding. In this study, seedlings of cadmium (Cd) hyperaccumulator Solanum nigrum were collected from two different climate-ecology regions of the western Sichuan Basin, China, to carry out reciprocal hybridizing and to study the Cd accumulation characteristics of F1 hybrids of S. nigrum. In the two pot experiments (high and low soil Cd concentration), the biomass and Cd extraction of reciprocal hybridizing F1 hybrids were higher than those of the parents, but the Cd content in different organs was lower than those of the parents. These results indicate that the biomass and Cd extraction of F1 hybrids show over-parent heterosis, and the Cd content shows hybrid weakness. In the field experiment, the variety of the biomass, Cd content, and Cd extraction of reciprocal hybridizing F1 hybrids were the same as the pot experiments, and the Cd extraction by shoots of reciprocal hybridizing F1 hybrids increased by 17.20 and 23.08 %, relative to the two higher parents. Therefore, the reciprocal hybridizing S. nigrum of different climate-ecology regions could be efficiently used to improve the phytoremediation ability of S. nigrum to Cd-contaminated soil.
Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, Sichuan, China.
Lijin
L
Lin
College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China.
Jing
J
He
Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, Sichuan, China.
Xun
X
Wang
Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, Sichuan, China.
Jin
J
Wang
Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, Sichuan, China.
Xiulan
X
Lv
College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China. lman@sicau.edu.cn.
Ming'an
M
Liao
College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China.
Zhihui
Z
Wang
Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, Sichuan, China.
Yi
Y
Tang
Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, Sichuan, China.
Dong
D
Liang
Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, Sichuan, China.
Hui
H
Xia
Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, Sichuan, China.
Yunsong
Y
Lai
D001673:Biodegradation, Environmental; D018533:Biomass; D002104:Cadmium / Q000032:analysis / Q000378:metabolism*; D002681:China; D002980:Climate; D004463:Ecology; D060146:Ecotype; D006824:Hybridization, Genetic; D018517:Plant Roots / Q000737:chemistry; D012987:Soil; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism*; D032324:Solanum nigrum / Q000235:genetics / Q000378:metabolism*
D012987:Soil; D012989:Soil Pollutants; D002104:Cadmium
Cadmium; Climate–ecology region; Hybridizing; Solanum nigrum