ltc: Analysis of Line x Tester data containing only Crosses laid...

In gpbStat: Comprehensive Statistical Analysis of Plant Breeding Experiments

Description

Analysis of Line x Tester data containing only Crosses laid out in RCBD or Alpha Lattice design.

Usage

ltc(data, replication, line, tester, y, block)

Arguments

data	dataframe containing following variables
replication	replication
line	line
tester	tester
y	trait of interest
block	block (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.

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 pecent 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 [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

ltcchk, dm2, ltcmt

Examples

## Not run: #Line Tester analysis data with only crosses in RCBD
library(gpbStat)
data(rcbdltc)
result1 = ltc(rcbdltc, replication, line, tester, yield)
result1

#Line Tester analysis data with only crosses in Alpha Lattice
library(gpbStat)
data(alphaltc)
result2 = ltc(alphaltc, replication, line, tester, yield, block)
result2

## End(Not run)

gpbStat documentation built on Oct. 30, 2021, 5:07 p.m.