dactylis_EC


The orchadgrass (Dactylis glomerata L.) germplasm collection, held at Botanical Garden of Plant Breeding and Acclimatization 
Institute in Bydgoszcz, Poland. The number of accessions was limited by the availability of the data on the 8 important 
agro-morphological traits. ). The accessions were assessed in the field trials located at Botanical Garden of Plant Breeding 
and Acclimatization Institute in Bydgoszcz, Poland (53.174 N, 18.046 E) 


ccChooser can be used to developing and evaluation of core
collections for germplasm collections (entire collection). This
package used to develop a core collection for biological
resources like genbanks. A core collection is defined as a
sample of accessions that represent, with the lowest possible
level of redundancy, the genetic diversity (the richness of
gene or genotype categories) of the entire collection. The
establishing a core collection that represents genetic
diversity of the entire collection with minimum loss of its
original diversity and minimum redundancies is an important
problem for gene-banks curators and crop breeders. ccChooser
establish core collection base on phenotypic data (agronomic,
morphological, phenological).

Marcin Studnicki

ccChooser

Developing a core collections

dactylis_EC function

A data frame with 1971 accessions on the following 8 variables and cllassification by UPGMA methods.
  <dl>
    <dt><code>UPGMA</code></dt><dd>classification accessions by UPGMA cluster analysis methods</dd> <dt><code>X1</code></dt><dd>plant height (cm)</dd> <dt><code>X2</code></dt><dd>inflorescence length </dd> <dt><code>X3</code></dt><dd>leaf width (cm)</dd> <dt><code>X4</code></dt><dd>leaf length (cm)</dd> <dt><code>X5</code></dt><dd>total seasonal yield (kg)</dd> <dt><code>X6</code></dt><dd>1000 kernel weight (g)</dd> <dt><code>X7</code></dt><dd>number of days since the 1st April to inflorescence emergence</dd> <dt><code>X8</code></dt><dd>number of days since the 1st April to inflorescence</dd> </dl> 

dactylis_EC: The orchadgrass germplasm collection

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