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Mapping quantitative trait loci for grain yield and yield related traits in a hexaploid winter wheat doubled haploid population.

机译:绘制六倍体冬小麦单倍体单倍体群体中籽粒产量和产量相关性状的数量性状基因座图。

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摘要

Improving wheat grain yield potential is imperative to match the increasing food demand associated with a fast growing population. Genetic and modeling approaches were employed to investigate the genetic basis and phenotype network regarding grain yield and yield related traits in a soft red winter wheat doubled haploid population. The population and two parents were evaluated in five year-location trials in the USA and genotyped by high throughput DNA markers including simple sequence repeat (SSR) and single nucleotide polymorphism (SNP). Bi-parental linkage mapping identified a number of QTLs for grain yield and yield related traits among which sixty were for grain yield components (GYLD, grain yield; SPSM, spikes per square meter; TGW, thousand grain weight; GPS, grains per spike; GWPS, grain weight per spike), seventy four were for plant architecture (PHT, plant height; FLL, flag leaf length; FLW, flag leaf width; FLA, flag leaf area; FLS, flag leaf shape or length/width ratio), and one hundred and nine were for spike morphology (SL, spike length; TSN, total spikelet number per spike; FSN, fertile spikelet number per spike; SSN, sterile spikelet number per spike; SC, spike compactness; GSP, grains per spikelet). In addition, structural equation modeling is described to construct a phenotype network. It revealed that GSP and FSN may mediate yield component compensation. Furthermore, doubled haploid lines DH96 and DH84 may have potential as new high-yielding cultivars for the Mid-Atlantic region.
机译:必须满足与快速增长的人口有关的不断增长的粮食需求,以提高小麦籽粒的单产潜力。利用遗传和建模方法研究了软红冬小麦双单倍体群体的籽粒产量及其相关性状的遗传基础和表型网络。在美国进行的为期五年的位置试验中,对该种群和两名亲本进行了评估,并通过高通量DNA标记(包括简单序列重复(SSR)和单核苷酸多态性(SNP))进行基因分型。双亲连锁图谱确定了许多与籽粒产量和产量相关性状的QTL,其中六十个与籽粒产量成分有关(GYLD,籽粒产量; SPSM,每平方米穗数; TGW,千粒重; GPS,每穗籽粒; GWPS(每穗穗粒重),其中74种用于植物结构(PHT,植物高度; FLL,旗叶长度; FLW,旗叶宽度; FLA,旗叶面积; FLS,旗叶形状或长/宽比), 109个为穗状形态(SL,穗长; TSN,每个穗的总小穗数; FSN,每个穗的可育小穗数; SSN,每个穗的无菌小穗数; SC,穗紧密度; GSP,每个小穗粒) 。另外,描述了结构方程建模以构建表型网络。结果表明,GSP和FSN可能会调节产量成分补偿。此外,双倍单倍体系DH96和DH84可能作为中大西洋地区新的高产品种。

著录项

  • 作者

    Zhou, Yaopeng.;

  • 作者单位

    University of Maryland, College Park.;

  • 授予单位 University of Maryland, College Park.;
  • 学科 Plant sciences.
  • 学位 Ph.D.
  • 年度 2015
  • 页码 225 p.
  • 总页数 225
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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