heterosis {agricolae} | R Documentation

## Data of potato, 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.

### Usage

    data(heterosis)

### Format

A data frame with 216 observations on the following 11 variables.

`Place`

  1: La Molina, 2=Huancayo

`Replication`

  a numeric vector

`Treatment`

  a numeric vector

`Factor`

  a factor with levels `Control` `progenie` `progenitor` `testigo`

`Female`

  a factor with levels `Achirana` `LT-8` `MF-I` `MF-II` `Serrana` `TPS-2` `TPS-25` `TPS-7`

`Male`

  a factor with levels `TPS-13` `TPS-67` `TS-15`

`v1`

  Yield (Kg/plant)

`v2`

  Reducing sugars (scale):1 low and 5=High

`v3`

  Tuber dry matter (percentage)

`v4`

  Tuber number/plant

`v5`

  Average tuber weight (g)

### Details

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.

### Source

International Potato Center(CIP). Lima-Peru. Data Kindly provided by of Rolando Cabello.

### References

Tesis "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.

### 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))

[Package agricolae version 1.2-9 Index]