ltcchk: Analysis of Line x Tester data containing crosses and checks...

In gpbStat: Comprehensive Statistical Analysis of Plant Breeding Experiments

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

Description

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

Usage

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

Arguments

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)

Details

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.

Value

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.

Note

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

Author(s)

Nandan Patil

Nandan Patil [e-mail]

References

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.

See Also

ltc, dm2, ltcmt

Examples

## 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.