Characterization of root architecture in an applied core collection for phosphorus efficiency of soybean germplasm |
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Authors: | Jing?Zhao Jiabing?Fu Hong?Liao Yong?He Hai?Nian Yueming?Hu Linjuan?Qiu Yinsan?Dong Email author" target="_blank">Xiaolong?YanEmail author |
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Institution: | e-mail: xlyan@ scau.edu.cn |
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Abstract: | In the present study, we constructed an “applied core collection” for phosphorus (P) efficiency of soybean germplasm using
a GIS-assisted approach. Systematic characterization and comparative analysis of root architecture were conducted to evaluate
the relationship between root architecture and P efficiency and its possible evolutionary pattern. Our results found that:
i) root architecture was closely related to P efficiency in soybean. Shallow root architecture had better spatial configuration
in the P-rich cultivated soil layer hence higher P efficiency and soybean yield; ii) there was a possible co-evolutionary
pattern among shoot type, root architecture and P efficiency. The bush cultivated soybean had a shallow root architecture
and high P efficiency, the climbing wild soybean had a deep root architecture and low P efficiency, while the root architecture
and P efficiency of semi-wild soybean were intermediate between cultivated and wild soybean; iii) P availability regulated
root architecture. Soybean roots became shallower with P addition to the topsoil, indicating that the co-evolutionary relationship
between root architecture and P efficiency might be attributed to the long-term effects of topsoil fertilization. Our results
could provide important theoretical basis for improving soybean root traits and P efficiency. |
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Keywords: | soybean applied core collection root architecture P efficiency |
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