检索结果-南通市图书馆

Spectral reflectance indices as proxies for yield potential and heat stress tolerance in spring wheat: heritability estimates and marker-trait associations

引用

Frontiers of Agricultural Science and Engineering 2019年第3期6卷 296-308页

作者： Caiyun LIU Francisco PINTO CMariano COSSANI Sivakumar SUKUMARAN matthew preynolds International Maize and Wheat Improvement Center(CIMMYT) Texcoco56237Mexico South Australian Research and Development Institute–SARDI Adelaide5001Australia School of Agriculture Food and WineThe University of AdelaideUrrbrae SA5064Australia

The application of spectral reflectance indices(SRIs) as proxies to screen for yield potential(YP) and heat stress(HS) is emerging in crop breeding programs.Thus, a comparison of SRIs and their associations with grain yield(GY) under YP and HS conditions is important.In this study, we assessed the usefulness of 27 SRIs for indirect selection for agronomic traits by evaluating an elite spring wheat association mapping initiative(WAMI) population comprising 287 elite lines under YP and HS conditions.Genetic and phenotypic analysis identified 11 and 9 SRIs in different developmental stages as efficient indirect selection indices for yield in YP and HS conditions,respectively.We identified enhanced vegetation index(EVI) as the common SRI associated with GY under YP at booting, heading and late heading stages, whereas photochemical reflectance index(PRI) and normalized difference vegetation index(NDVI) were the common SRIs under booting and heading stages in HS.Genomewide association study(GWAS) using 18704 single nucleotide polymorphisms(SNPs) from Illumina i Select90 K identified 280 and 43 marker-trait associations for efficient SRIs at different developmental stages under YP and HS, respectively.Common genomic regions for multiple SRIs were identified in 14 regions in 9 chromosomes: 1 B(60–62 cM), 3 A(15, 85–90, 101–105 cM), 3 B(132–134 cM), 4 A(47–51 cM), 4 B(71–75 cM), 5 A(43–49, 56–60, 89–93 cM), 5 B(124–125 cM),6 A(80–85 cM), and 6 B(57–59, 71 cM).Among them,SNPs in chromosome 5 A(89–93 cM) and 6 A(80–85 cM)were co-located for yield and yield related traits.Overall,this study highlights the utility of SRIs as proxies for GY under YP and HS.High heritability estimates and identification of marker-trait associations indicate that SRIs are useful tools for understanding the genetic basis of agronomic and physiological traits.

关键词： genome-wide association study(GWAS) heat tolerance spectral reflectance spring wheat

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

An integrated framework reinstating the environmental dimension for GWAS and genomic selection in crops

引用

Molecular Plant 2021年第6期14卷 874-887页

作者： Xianran Li Tingting Guo Jinyu Wang Wubishet ABekele Sivakumar Sukumaran Adam EVanous James PMcNellie Laura Tibbs Cortes Marta SLopes Kendall RLamkey Mark EWestgate John KMcKay Sotirios VArchontoulis matthew preynolds Nicholas ATinker Patrick SSchnable Jianming Yu Department of Agronomy Iowa State UniversityAmesIA 50011USA Ottawa Research and Development Centre Agriculture and Agri-Food CanadaOttawaONCanada International Maize and Wheat Improvement Center(CIMMYT) Mexico CityMexico Department of Bioagricultural Sciences and Pest Management Colorado State UniversityFort CollinsCO 80523USA

Identifying mechanisms and pathways involved in gene–environment interplay and phenotypic plasticity is a long-standing challenge.It is highly desirable to establish an integrated framework with an environmental dimension for complex trait dissection and prediction.A critical step is to identify an environmental index that is both biologically relevant and estimable for new environments.With extensive field-observed complex traits,environmental profiles,and genome-wide single nucleotide polymorphisms for three major crops(maize,wheat,and oat),we demonstrated that identifying such an environmental index(i.e.,a combination of environmental parameter and growth window)enables genome-wide association studies and genomic selection of complex traits to be conducted with an explicit environmental dimension.Interestingly,genes identified for two reaction-norm parameters(i.e.,intercept and slope)derived from flowering time values along the environmental index were less colocalized for a diverse maize panel than for wheat and oat breeding panels,agreeing with the different diversity levels and genetic constitutions of the panels.In addition,we showcased the usefulness of this framework for systematically forecasting the performance of diverse germplasm panels in new environments.This general framework and the companion CERIS-JGRA analytical package should facilitate biologically informed dissection of complex traits,enhanced performance prediction in breeding for future climates,and coordinated efforts to enrich our understanding of mechanisms underlying phenotypic variation.

关键词： phenotypic plasticity genotype by environment interaction gene-environment interplay genomewide association studies genomic selection flowering time reaction norm

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

精神分裂症脑皮质GABA能神经功能减低的研究——钙结合蛋白免疫活性选择性降低

引用

国外医学（精神病学分册） 2002年第3期29卷 158-161页

作者：张志珺唐勇 Gavin preynolds 南京医科大学附属脑科医院研究所英国谢菲尔德大学生物医学系

研究表明多种神经化学物质减少可提示精神分裂症脑皮质γ 氨基丁酸 (GABA)能中间神经元缺失或 /和功能障碍。GABA能神经元神经化学指征异常包括GABA摄取部位、谷氨酸脱羟酶 (GAD)及与GABA并存的某些神经肽和钙结合蛋白 (CBP)的异常。这... 详细信息

研究表明多种神经化学物质减少可提示精神分裂症脑皮质γ 氨基丁酸 (GABA)能中间神经元缺失或 /和功能障碍。GABA能神经元神经化学指征异常包括GABA摄取部位、谷氨酸脱羟酶 (GAD)及与GABA并存的某些神经肽和钙结合蛋白 (CBP)的异常。这些均提示GABA能神经元特定亚型的减少 ,其中钙结合蛋白选择性减少尤为明显。研究发现精神分裂症患者前额皮质parvalbumin (PV)和calbindin (CB)免疫反应神经元减少 ,但calretinin (CR)免疫反应细胞正常。含PV和CB神经元密度的选择性降低反映了细胞内表达功能障碍或GABA能神经元某些亚型密度下降 ,后者的发生可能符合神经发育病因假说 ,该理论认为在保护性钙结合蛋白表达之前的某个时期发生了神经元的损害。

关键词：精神分裂症 γ-氨基丁酸 GABA 钙结合蛋白免疫活性

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：