ltcchk | R Documentation |

Analysis of Line x Tester data containing crosses and checks laid out in RCBD or Alpha Lattice experimental design.

```
ltcchk(data, replication, line, tester, check, y, block)
```

`data` |
dataframe containing following variables |

`replication` |
replication variable |

`line` |
line variable |

`tester` |
tester variable |

`check` |
check variable |

`y` |
trait of interest |

`block` |
block variable (for alpha lattice design only) |

Analyzing the line by tester data only using the data from crosses which are evaluated in alpha lattice design. All the factors are considered as fixed.

Analyzing the line by tester data only using the data from crosses which are evaluated in alpha lattice design. All the factors are considered as fixed.

`Overall ANOVA` |
ANOVA with all the factors. |

`Coefficient of Variation` |
ANOVA with all the factors. |

`Genetic Variance` |
Phenotypic and Genotypic variance for the given trait. |

`Genetic Variability` |
Phenotypic coefficient of variability and Genotypic coefficient of variability and Environmental coefficient of Variation. |

`Proportional Contribution` |
Propotional contribution of Lines, Tester and Line x Tester interaction. |

`GCA lines` |
Combining ability effects of lines. |

`GCA testers` |
Combining ability effects of testers. |

`SCA crosses` |
Combining ability effects of crosses |

```
Line x Tester
ANOVA
``` |
ANOVA with all the factors. |

`GV Singh & Chaudhary` |
Genetic component of Variance as per Singh and Chaudhary, 1977. |

`Standard Errors` |
Standard error for combining ability effects. |

`Critical Difference` |
Critical Difference at 5 percent for combining ability effects. |

The block variable is inserted at the last if the experimental design is Alpha Lattice. For RCBD no need to have block factor.

Nandan Patil

Nandan Patil tryanother609@gmail.com

Kempthorne, O. (1957), Introduction to Genetic Statistics. John Wiley and Sons, New York. , 468-472. Singh, R. K. and Chaudhary, B. D. (1977). Biometrical Methods in Quantitative Genetic Analysis. Kalyani Publishers, New Delhi.

`ltc, dm2, ltcmt`

```
## Not run: #Line x Tester analysis with crosses and checks in RCBD
library(gpbStat)
data(rcbdltcchk)
results = ltcchk(rcbdltcchk, replication, line, tester, check, yield)
results
#Line X Tester analysis with crosses and checks in Alpha Lattice
library(gpbStat)
data(alphaltcchk)
results1 = ltcchk(alphaltcchk, replication, line, tester, check, yield, block)
results1
## End(Not run)
```

gpbStat documentation built on Nov. 2, 2023, 5:52 p.m.

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