Xin-Ge Li, Yang Gao, Xiaojun Liu, Yongchao Tian, Yan Zhu, W. Cao, Q. Cao
{"title":"Effects of sowing dates, sowing rates, and nitrogen rates on growth and spectral indices in winter wheat","authors":"Xin-Ge Li, Yang Gao, Xiaojun Liu, Yongchao Tian, Yan Zhu, W. Cao, Q. Cao","doi":"10.3724/sp.j.1006.2022.11033","DOIUrl":"https://doi.org/10.3724/sp.j.1006.2022.11033","url":null,"abstract":": To clarify the effects of sowing dates, sowing rates, and nitrogen rates on growth and spectral indices in winter wheat, a two-year winter wheat field experiment under different sowing dates, sowing rates, and nitrogen rates was conducted. We studied systematically the effects of three factors and their interactions on yield, leaf area index (LAI), and normalized difference red edge (NDRE) of winter wheat at critical growth stages. Furthermore, to facilitate real-time monitoring of winter wheat growth dynamics, we also established the appropriate time-series curves of winter wheat canopy NDRE under different yield levels. The results indicated that the change patterns of NDRE and LAI at critical growth stages were very consistent, and the response of three factors to the two indices at critical growth stages was basically the same in winter wheat. In 2018 and 2019, the yield, LAI, and NDRE of winter wheat at each growth stages decreased with the delay of sowing date. In 2019 and 2020, the yield, peaks of LAI and NDRE under late sowing date were the largest except for the filling stage. The LAI and NDRE of winter wheat at different growth stages in the two years increased with the increase of nitrogen rates. However, there was basically no significant difference among sowing rates. Among the three factors, the sowing dates and nitrogen rates had a significant influence on the time-series curves of winter wheat canopy NDRE. The NDRE time series curves of winter wheat were stretched with the increase of nitrogen rates, the descending part of NDRE time series curve shifted to the left with the delay of the sowing date. In 2018 and 2019, the peak values of NDRE time series curves of winter wheat were declined with the delay of the sowing date. In 2019 and 2020, the peak values of the NDRE time series curves of late sowing and over-late sowing winter wheat were higher than that of suitable sowing wheat. The data of two years were merged to establish suitable time-series curves of winter wheat canopy NDRE under three yield levels, and the yield levels were less than 6.75 t hm –2 , 6.75–8.25 t hm –2 , and higher than 8.25 t hm –2 , respectively. The peak values and width of the NDRE time-series curves increased with the increase of yield level. In summary, winter wheat should be sown early at an appropriate date, but if the accumulated temperature before winter was higher, the sowing date should be postponed appropriately. And the growth of late sowing winter wheat could be improved by increasing a certain amount of sowing rates and nitrogen rates. At the same time, these results could provide a technical support for monitoring the growth of winter wheat under different sowing dates and different yield levels.","PeriodicalId":52132,"journal":{"name":"Acta Agronomica Sinica(China)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45246343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xin Xu, Chao Qin, T. Zhao, Bin Liu, Hong-Yu Li, Jun Liu
{"title":"Function analysis of GmELF3s in regulating soybean flowering time and circadian rhythm","authors":"Xin Xu, Chao Qin, T. Zhao, Bin Liu, Hong-Yu Li, Jun Liu","doi":"10.3724/sp.j.1006.2022.14076","DOIUrl":"https://doi.org/10.3724/sp.j.1006.2022.14076","url":null,"abstract":": Soybean is a typical short-day crop. Photoperiod sensitivity seriously affects flowering time, yield, and planting range of soybean, but the mechanism underlying photoperiod and circadian rhythm regulation is still unclear. In Arabidopsis thaliana , ELF3, together with ELF4 and LUX, forms the ELF4-ELF3-LUX complex (Evening Complex, EC), which plays an important role in circadian rhythm and flowering time regulation. In this study, soybean mutants of Gmelf3a/j , Gmelf3b-1 , and Gmelf3b-2 were obtained by CRISPR/Cas9 gene editing system. We found that GmELF3b-1 regulated the flowering time in soybean under long-day conditions by observing flowering phenotypes in these mutants. The phenotypes of heterozygous double mutants re-vealed that there was functional redundancy among GmELF3a/J, GmELF3b-1 , and GmELF3b-2 in regulating flowering time of soybean. Through detecting the expression of circadian related genes in soybean by using qRT-PCR, it was found that the relative expression patterns of GmCAB , GmPRR9a , and GmPRR7a were changed in soybean. In summary, these results suggested that GmELF3a/J, GmELF3b-1, and GmELF3b-2 may regulate the circadian rhythm and flowering time through GmPRR9a and GmPRR7a in soybean.","PeriodicalId":52132,"journal":{"name":"Acta Agronomica Sinica(China)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47014825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xiao-Hong Chen, Yuan Lin, Qianqian Wang, Min Ding, Haigang Wang, Ling Chen, Zhi-Jun Gao, Rui-Yun Wang, Z. Qiao
{"title":"Development of DNA molecular ID card in hog millet germplasm based on high motif SSR","authors":"Xiao-Hong Chen, Yuan Lin, Qianqian Wang, Min Ding, Haigang Wang, Ling Chen, Zhi-Jun Gao, Rui-Yun Wang, Z. Qiao","doi":"10.3724/sp.j.1006.2022.14034","DOIUrl":"https://doi.org/10.3724/sp.j.1006.2022.14034","url":null,"abstract":"","PeriodicalId":52132,"journal":{"name":"Acta Agronomica Sinica(China)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43403596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Haomian Du, Yu-Han Cheng, Tai Li, Zhihong Hou, Yong-Li Li, Haiyang Nan, Lidong Dong, Baoquan Liu, Qun Cheng
{"title":"Improving seed number per pod of soybean by molecular breeding based on <italic>Ln</italic> locus","authors":"Haomian Du, Yu-Han Cheng, Tai Li, Zhihong Hou, Yong-Li Li, Haiyang Nan, Lidong Dong, Baoquan Liu, Qun Cheng","doi":"10.3724/sp.j.1006.2022.14011","DOIUrl":"https://doi.org/10.3724/sp.j.1006.2022.14011","url":null,"abstract":"","PeriodicalId":52132,"journal":{"name":"Acta Agronomica Sinica(China)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47742687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
H. Ding, Yang Xu, Guanchu Zhang, F. Qin, L. Dai, Zhimeng Zhang
{"title":"Effects of drought at different growth stages and nitrogen application on nitrogen absorption and utilization in peanut","authors":"H. Ding, Yang Xu, Guanchu Zhang, F. Qin, L. Dai, Zhimeng Zhang","doi":"10.3724/sp.j.1006.2022.14038","DOIUrl":"https://doi.org/10.3724/sp.j.1006.2022.14038","url":null,"abstract":"","PeriodicalId":52132,"journal":{"name":"Acta Agronomica Sinica(China)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42140536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}