Trait

n
^{a}

s
^{b}

Compression Level (
c
)
^{c}

\( \left({\widehat{\boldsymbol{\upsigma}}}_{\mathbf{g}}^{\mathbf{2}}\right) \)
^{d}

\( \left({\widehat{\boldsymbol{\upsigma}}}^{\mathbf{2}}\right) \)
^{e}

\( \left(\frac{{\widehat{\boldsymbol{\upsigma}}}_{\mathbf{g}}^{\mathbf{2}}}{{\widehat{\boldsymbol{\upsigma}}}_{\mathbf{g}}^{\mathbf{2}} + {\widehat{\boldsymbol{\upsigma}}}^{\mathbf{2}}}\right) \)
^{f}


TL

267

32

8.34

32.80

50.61

0.39

SD

267

201

1.33

1.45

9.51

0.13

KR

265

166

1.60

0.15

0.16

0.48

PH

266

192

1.39

384.70

256.56

0.60

DTA

266

240

1.11

45.03

5.03

0.94

DTS

266

240

1.11

51.19

5.87

0.90

 TL, tunnel length; SD, stem damage; KR, borer kernel resistance; PH, plant height; DTA, days to anthesis; DTS, days to silking.

^{a} Total number of inbred lines included in the analysis.

^{b} Number of groups obtained using a clustering approach based on K matrix with the optimum compression level option.

^{c} Compression level is the average number of inbred lines per group estimated as n/s.

^{d} Additive background genetic variance component estimated in Tassel by fitting the K matrix in the MLM without any SNP marker effects.

^{e} Residual genotypic variance component estimated in Tassel.

^{f} Proportion of phenotypic variance explained by the K matrix, estimated as background genetic variance divided by total phenotypic variance.