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| Cd accumulation in grains of introgression lines of Yuanjiang common wild rice and its correlation with agronomic traits in rice |
| Received:February 20, 2021 |
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| KeyWord:Oryza rufipogon Griff.;introgression lines;cadmium;agronomic traits |
| Author Name | Affiliation | E-mail | | ZENG Min | Biotechnology and Germplasm Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming 650223
Yunnan Provincial Key Lab of Agricultural Biotechnology, Kunming 650223, China | | | ZENG Liqiong | Biotechnology and Germplasm Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming 650223
Yunnan Provincial Key Lab of Agricultural Biotechnology, Kunming 650223, China | | | WANG Lingxian | Biotechnology and Germplasm Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming 650223
Yunnan Provincial Key Lab of Agricultural Biotechnology, Kunming 650223, China | | | LI Exian | Biotechnology and Germplasm Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming 650223
Yunnan Provincial Key Lab of Agricultural Biotechnology, Kunming 650223, China | | | ZHONG Qiaofang | Biotechnology and Germplasm Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming 650223
Yunnan Provincial Key Lab of Agricultural Biotechnology, Kunming 650223, China | | | ZHAO Baiying | Rural Industry Development Center of Yuanjiang County, Yuanjiang 653300, China | | | GUO Rong | Industrial Crop Research Institute, Yunnan Academy of Agricultural Sciences, Kunming 650205, China | grmm0207@126.com |
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| Abstract: |
| This study aimed to evaluate the cadmium(Cd) accumulation capacity of Yunnan common wild rice by investigation of Cd accumulation in grains of introgression lines of Yuanjiang common wild rice and to explore the relationship between the Cd content in the grains and the main agronomic traits of rice. A total of 120 BC3F4 strains of Yuanjiang wild rice introgression lines were planted in a Cdcontaminated farmland in southern Yunnan from March to October in 2019. We detected the Cd content in the grains, evaluated the main agronomic traits, and also conducted a correlation analysis between them. The results were as follows:the minimum and maximum Cd accumulation in the 120 introgression lines were 0.05 mg·kg-1 and 3.57 mg·kg-1, respectively, indicating an extensive genetic diversity in Cd uptake in the grains of the introgression line progeny. Fifty-four low-Cd accumulation and three high-Cd-accumulation strains were screened from the 120 introgression lines. The 120 introgression lines were divided into three types, including indica, japonica, and colored rice. Each rice type exhibited a substantial difference in the Cd content in the grains with large variation coefficients. The Cd content in the grains of colored rice was significantly different from those of indica and japonica rice, whereas no significant difference could be detected between the indica and japonica rice. The Cd content in the grains positively correlated with rice yield and seed setting rate with correlation coefficients of 0.411 and 0.300, respectively, and no correlation with other traits. The correlation coefficients between the grain Cd content and indica and japonica yields were 0.446 and 0.672, respectively, and the correlation coefficients between the grain Cd content and seed setting rate of indica and japonica were 0.362 and 0.634, respectively. The Cd accumulation difference among the strains of the introgression lines was very significant, and low and high accumulation lines could be selected from them. We observed a correlation between the Cd content in the seeds of the introgression lines and the yield and seed setting rate, which could be used as a basis for the field identification of the Cd content in the lines and to provide a theoretical basis for mining Cd accumulation-related genes. |
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