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Characterization of chromosome segment substitution lines reveals candidate genes associated with the nodule number in soybean 被引量:1
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作者 ZOU Jia-nan ZHANG Zhan-guo +17 位作者 KANG Qing-lin YU Si-yang WANG Jie-qi CHEN Lin LIU Yan-ru MA Chao ZHU Rong-sheng ZHU Yong-xu DONG Xiao-hui JIANG Hong-wei WU Xiao-xia WANG Nan-nan HU Zhen-bang QI Zhao-ming LIU Chun-yan CHEN Qing-shan XIN Da-wei WANG Jin-hui 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2022年第8期2197-2210,共14页
Soybean is one of the most important food crops worldwide.Like other legumes,soybean can form symbiotic relationships with Rhizobium species.Nitrogen fixation of soybean via its symbiosis with Rhizobium is pivotal for... Soybean is one of the most important food crops worldwide.Like other legumes,soybean can form symbiotic relationships with Rhizobium species.Nitrogen fixation of soybean via its symbiosis with Rhizobium is pivotal for sustainable agriculture.Type Ⅲ effectors(T3Es)are essential regulators of the establishment of the symbiosis,and nodule number is a feature of nitrogen-affected nodulation.However,genes encoding T3Es at quantitative trait loci(QTLs)related to nodulation have rarely been identified.Chromosome segment substitution lines(CSSLs)have a common genetic background but only a few loci with heterogeneous genetic information;thus,they are suitable materials for identifying candidate genes at a target locus.In this study,a CSSL population was used to identify the QTLs related to nodule number in soybean.Single nucleotide polymorphism(SNP)markers and candidate genes within the QTLs interval were detected,and it was determined which genes showed differential expression between isolines.Four candidate genes(GmCDPK28,GmNAC1,GmbHLH,and GmERF5)linked to the SNPs were identified as being related to nodule traits and pivotal processes and pathways involved in symbiosis establishment.A candidate gene(GmERF5)encoding a transcription factor that may interact directly with the T3E NopAA was identified.The confirmed CSSLs with important segments and candidate genes identified in this study are valuable resources for further studies on the genetic network and T3Es involved in the signaling pathway that is essential for symbiosis establishment. 展开更多
关键词 SOYBEAN TypeⅢeffectors nodule number chromosome segment substitution lines
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Efficiency of Biological Nitrogen Fixation of Bradyrhizobium under Different Soil Fertility Levels as Measured by 15N Dilution Analysis
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作者 Suad Abduljabbar A1-Saedi Ibrahim Bakri Razaq Norrya Abdulhussin Ali 《Journal of Agricultural Science and Technology(B)》 2015年第7期459-464,共6页
The objective of this study was to determine the efficiency of biological nitrogen fixation (BNF) of local Bradyrhizobium isolates in soil of various fertility levels using 15N dilution technique. Local isolates wer... The objective of this study was to determine the efficiency of biological nitrogen fixation (BNF) of local Bradyrhizobium isolates in soil of various fertility levels using 15N dilution technique. Local isolates were obtained from cowpea rhizosphere in fields of different Iraqi provinces. Six isolates were selected in this study, which was conducted as a pot experiment under greenhouse conditions. Effects of the following fertility levels were evaluated: at F1, 0 mg N, P and K was added; at F2, 25 mg N/kg soil, 10 mg P/kg soil and 25 mg K/kg soil were added, respectively; the other two levels were F3 at which 50, 20 and 50 mg/kg soil and at F4 75, 30 and 75 mg/kg soil for N, P and K, respectively, were added. Urea, labeled with 15N 10% access atom (aa), was used as a source of N. The highest BNF was observed under the lowest fertility level, i.e., F1. BNF across all isolates was markedly decreased with the increase of nutrient application to soil, being totally eliminated at the highest fertility level F4. Numbers of nodules per plant root of all isolates were the least under the zero nutrients application and the highest nodules number were found under the highest levels of N, P and K application. Number of nodules does not necessarily reflect the best BNF efficiency of all isolates. However, fertility levels were of significant effect on average nodule number of all isolates. The lowest plant dry weight was under the first fertility level F1 irrelevant of Rhizobium isolates. In general, the highest plant dry weight was under the second soil fertility level F2. 展开更多
关键词 RHIZOBIUM local Iraqi strains COWPEA nodules number dry weight.
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