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首页> 外文学位 >Characterization of Field Pennycress (Thlaspi arvense L.) Germplasm for Use as a Cover Crop and Biofuel Feedstock
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Characterization of Field Pennycress (Thlaspi arvense L.) Germplasm for Use as a Cover Crop and Biofuel Feedstock

机译：用作覆盖农作物和生物燃料原料的田间肉enny（Thlaspi arvense L.）种质的表征

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摘要

Field pennycress (Thlaspi arvense L.) is a winter annual oilseed crop currently under investigation for use as a feedstock for domestic biofuel production. As an undomesticated species, pennycress has a variety of undesirable traits and the species has seen very limited formal selection or genetic improvement. This research seeks to characterize a collection of 42 wild, winter type accessions for morphological and yield component traits (Chapter 2) as well as seed chemistry traits (Chapter 3). This data will be used to guide the breeding and development of improved germplasm and eventual variety release. The germplasm collection was grown in five unique Minnesota environments in 2013/2014 and 2014/2015. Mixed effects models were used to estimate best linear unbiased estimates (BLUEs) for each of the accessions and traits, which were used in subsequent analyses. Within the morphological traits and yield component traits, relationships between traits were assessed using Pearson's correlation coefficients and estimates of heritability were calculated for each trait. Hierarchical clustering was used to identify groups of accessions based on similarity of trait values. Significant variation for accession was detected in 13 of the 19 trait models for morphological and yield component traits at P < 0.05, and for 1 of 19 at P < 0.10 (Table 2.7). Pairwise differences after adjusting for multiple comparisons using Tukey's Honest Significant Difference (HSD) resulted in more than one grouping in 9 of the 13 models in which accession was significant (P < 0.05). For seed chemistry traits, significant variation (P < 0.05) for accession was detected for nine of the ten fatty acids detected and oil percentage. Significant variation was observed for many of the traits evaluated, but to make sizable gains in selection for certain traits, additional genetic variation in the form of mutants and additional collections is required.
机译：田间仙女草（Thlaspi arvense L.）是一种冬季一年生油料作物，目前正在调查中，用作国内生物燃料生产的原料。作为未驯化的物种，仙女菊具有多种不良特性，并且该物种的正式选择或遗传改良非常有限。这项研究旨在表征42种野生，冬季类型的种质，这些种质具有形态和产量构成特征（第2章）以及种子化学性状（第3章）。该数据将用于指导改良种质的育种和发展以及最终的品种释放。种质集合在2013/2014和2014/2015的五个独特的明尼苏达州环境中生长。混合效应模型用于估计每个种质和性状的最佳线性无偏估计（BLUE），这些均用于后续分析中。在形态性状和产量构成性状中，利用皮尔逊相关系数评估性状之间的关系，并计算每个性状的遗传力估计值。基于特征值的相似性，使用层次聚类来识别种质组。在19个性状模型中，有13个的形态和产量构成性状在P <0.05时和19个中的1个在P <0.10时都检测到种质的显着差异（表2.7）。使用Tukey的“诚实显着性差异”（HSD）进行多次比较调整后，成对差异导致13个模型中有9个模型中的一个以上分组，其中加入显着（P <0.05）。对于种子化学性状，在检测到的十种脂肪酸中的九种和油含量中，检出了显着性差异（P <0.05）。在许多评估的性状上观察到显着的变异，但是要在某些特征的选择中获得可观的收益，就需要以突变体和附加收集物的形式进行其他遗传变异。

著录项

  • 作者

    Altendorf, Kayla Rae.;

  • 作者单位

    University of Minnesota.;

  • 授予单位 University of Minnesota.;
  • 学科 Plant sciences.;Agriculture.
  • 学位 M.S.
  • 年度 2017
  • 页码 113 p.
  • 总页数 113
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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