## Mapping, combining abilities, heritabilities and heterosis with 4x x 2x crosses in potato |

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Page 65

Heritability estimates based on GCA effects indicated that parents can be

efficiently selected for average tuber weight (h - 0.87) and specific gravity (h □

0.70), but not NS NS for total tuber yield (h^g - 0.25),

0.37), ...

Heritability estimates based on GCA effects indicated that parents can be

efficiently selected for average tuber weight (h - 0.87) and specific gravity (h □

0.70), but not NS NS for total tuber yield (h^g - 0.25),

**marketable tuber yield**(h2 -0.37), ...

Page 71

The 4x progenies from 4x x 2x crosses, yielded as well as, or better than 4x

cultivars used as females, for total tuber yield. The mean

of these 4x hybrid families was significantly below that of the 4x cultivars.

However, the ...

The 4x progenies from 4x x 2x crosses, yielded as well as, or better than 4x

cultivars used as females, for total tuber yield. The mean

**marketable tuber yield**of these 4x hybrid families was significantly below that of the 4x cultivars.

However, the ...

Page 75

Data were collected on a per plot basis for: 1) total tuber yield (weight of all the

tubers in kg/plot), 2)

in kg/plot), 3) specific gravity determined by the weight-in-air and weight- in-water

...

Data were collected on a per plot basis for: 1) total tuber yield (weight of all the

tubers in kg/plot), 2)

**marketable tuber yield**(weight of tubers > 35-45mm in size,in kg/plot), 3) specific gravity determined by the weight-in-air and weight- in-water

...

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### Contents

Genetic Mapping of Three Linked Genes | 34 |

Results | 78 |

Comparisons between 2x FDRCO and 2x FDRNCO | 94 |

2 other sections not shown

### Common terms and phrases

2n eggs 2n gamete formation 2x clones 2x crosses 2x FDR-CO 2x genotypes 2x level 2x parents 4x cultivars 4x progeny 4x x 2x centromere chromosome combining abilities coupling phase cytokinesis depending on frequency diploid distal locus division restitution dominance variance double crossovers double exchange tetrads endosperm epistasis epistatic estimates expressed as map FDR and SDR FDR or SDR form 2n gametes form 2n pollen Frequencies of parental frequency of single gametic series produced GCA variance genotypes in coupling haploid heterosis heterozygosity heterozygous heterozygous loci homozygous linked genes map units marketable tuber yield meiocytes mode of 2n periderm Phureja ploidy polyploidization potato progenies from 4x proximal locus random chromatid exchange repulsion phase rH rH S. J. Peloquin SDR mode SET.I single and double single exchange tetrads Solanum Solanum tuberosum specific gravity Table tetrad analysis tetraploid total tuber yield tuber shape types of 2n unpigmented