R/heterosis.R

In myaseen208/agricolae: Statistical Procedures for Agricultural Research

#' @title Data of potato, Heterosis
#' @name   heterosis
#' @docType data
#' @keywords datasets
#' @usage data(heterosis)
#' @description
#' Determination of heterosis, general combining ability (GCA) and specific
#' combining ability in tuber dry matter, reducing sugars and agronomic
#' characteristics in TPS families.
#' 
#' The study was conducted in 3 environments, La Molina-PERU to 240 masl.
#' during autumn-winter and spring, and in Huancayo-PERU 3180 masl., during
#' summer.  The experimental material consisted of 24 families half brother in
#' the form of tubers derived from TPS, obtained crossing between 8 female and
#' 3 male parents.  Design used was randomized complete block with three
#' repetitions.  The experimental unit was 30 plants in two rows at a distance
#' of 30cm between plants and 90 cm between rows. Variables evaluated were
#' Yield, Tubers number, Dry matter and content and reducing sugars. The
#' analysis was conducted line x tester. The control variety was Desiree.
#' 

#' @format 
#' A \code{data.frame} with 216 observations on the following 11 variables.
#' 
#'  @details
#'         \itemize{
#'         \item{\strong{Place}} 1 = La Molina, 2 = Huancayo
#'         \item{\strong{Replication}} Replication
#'         \item{\strong{Treatment}} Treatment
#'         \item{\strong{Factor}} a factor with levels Control, progenie, progenitor, and testigo
#'         \item{\strong{Female}} a factor with levels Achirana, LT-8, MF-I, MF-II, 
#'                                Serrana, TPS-2, TPS-25, and TPS-7
#'         \item{\strong{Male}} a factor with levels TPS-13, TPS-67, and TS-15
#'         \item{\strong{v1}} Yield (Kg/plant)
#'         \item{\strong{v2}} Reducing sugars (scale):1 low and 5=High
#'         \item{\strong{v3}} Tuber dry matter (percentage)
#'         \item{\strong{v4}} Tuber number/plant
#'         \item{\strong{v5}} Average tuber weight (g)
#'         }
#' 
#' @references 
#' Thesis "Heterosis, habilidad combinatoria general y especifica
#' para materia seca, azucares reductores y caracteres agronomicos en familias
#' de tuberculos provenientes de semilla sexual de papa. Magister Scientiae
#' Rodolfo Valdivia Lorente. Universidad Nacional Agraria La molina-Lima Peru,
#' Escuela de Post Grado, Mejoramiento genetico de plantas, 2004". Poster:
#' Congreso de la Sociedad Peruana de Genetica - Peru, 2008.
#' 
#' @source 
#' International Potato Center(CIP). Lima-Peru. Data Kindly provided by
#' of Rolando Cabello.
#' 
#' @keywords datasets
#' @examples
#' 
#' library(agricolae)
#' data(heterosis)
#' str(heterosis)
#' site1<-subset(heterosis,heterosis[,1]==1)
#' site2<-subset(heterosis,heterosis[,1]==2)
#' site3<-subset(heterosis,heterosis[,1]==3)
#' model1<-with(site1,lineXtester(Replication, Female, Male, v1))
#' DFe <- df.residual(model1)
#' CMe <- deviance(model1)/DFe
#' test1 <- with(site1,HSD.test(v1, Factor,DFe,CMe))
#' test2 <- with(site1,HSD.test(v1, Treatment,DFe,CMe))
#' model22<-with(site2,lineXtester(Replication, Female, Male, v3))
#' model3<-with(site3,lineXtester(Replication, Female, Male, v4))
#' 
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