Screening of diverse cassava genotypes based on nitrogen uptake efficiency and yield

被引：0

作者：

KANG Liang ^{[1
,2
]}

LIANG Qiongyue ^{[1
]}

JIANG Qiang ^{[1
,3
]}

YAO Yihua ^{[1
]}

DONG Mengmeng ^{[1
]}

HE Bing ^{[1
]}

GU Minghua ^{[1
]}

机构：

[1] State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/College of Agriculture, Guangxi University

[2] College of Pharmacy, Guangxi Medical University

[3] Modern Agricultural Technology Research and Promotion Center

来源：

Journal of Integrative Agriculture | 2020年 / 19卷 / 04期

关键词：

cassava; high-nitrogen(N) efficiency; genotype screening; low-N soil;

D O I：

暂无

中图分类号：

S533 [木薯（树薯）];

学科分类号：

0901 ;

摘要：

As one of the top three tuber crops of the world, cassava is a staple food and feed crop for tropical and subtropical regions. Because of its high drought resistance and tolerance to nutrient deficiency, cassava is usually cultivated on hilly areas that are nutrient-poor. Nitrogen(N) is one of the significant factors affecting cassava yield. A double factorial(N level×genotypes) split-plot field experiment was conducted to analyze differences in yield and N accumulation of 25 cassava genotypes under low-N conditions to screen for cassava genotypes with high-N efficiency. The two-year field experiment showed that cassava yield and N accumulation are determined by specific genotypes, soil N levels, and year. Among these factors, soil N levels are the main factors that are responsible for differences in cassava yield. When yield and relative N accumulation under low-N conditions were used as screening markers, we identified an efficient and responsive genotype(SC10), and two inefficient and non-responsive genotypes(SC205 and GR5). The efficient and responsive genotype and the inefficient and non-responsive genotype can be used as study materials to further reveal the mechanisms for high-N efficiency in cassava.

引用

页码：965 / 974

页数：10

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