Book contents
- Frontmatter
- Contents
- List of contributors
- Preface
- Editors' note and acknowledgements
- Introduction
- The development of potato varieties in Europe
- Genetic Resources
- Breeding Strategies
- Selection and Screening Methods
- Variety Assessment
- Semi-conventional Breeding Methods
- Efficient utilization of wild and primitive species in potato breeding
- Advances and limitations in the utilization of Neotuberosum in potato breeding
- Breeding at the 2x level and sexual polyploidization
- Haploids extracted from four European potato varieties
- Heterosis for tuber yields and total solids content in 4x x 2x FDR-CO crosses
- Variability of F1 progeny derived from interploidy (4x x 2x) crossing
- Unreduced gametes in the breeding of potatoes at the diploid level
- Desynapsis and FDR 2n-egg formation in potato: its significance to the experimental induction of diplosporic apomixis in potato
- Utilizing wild potato species via Solanum phureja crosses
- The use of diploid Solanum phureja germplasm
- Advances in population breeding and its potential impact on the efficiency of breeding potatoes for developing countries
- True Potato Seed
- Unconventional Breeding Methods
- Commentary
- Index
Haploids extracted from four European potato varieties
Published online by Cambridge University Press: 05 March 2012
- Frontmatter
- Contents
- List of contributors
- Preface
- Editors' note and acknowledgements
- Introduction
- The development of potato varieties in Europe
- Genetic Resources
- Breeding Strategies
- Selection and Screening Methods
- Variety Assessment
- Semi-conventional Breeding Methods
- Efficient utilization of wild and primitive species in potato breeding
- Advances and limitations in the utilization of Neotuberosum in potato breeding
- Breeding at the 2x level and sexual polyploidization
- Haploids extracted from four European potato varieties
- Heterosis for tuber yields and total solids content in 4x x 2x FDR-CO crosses
- Variability of F1 progeny derived from interploidy (4x x 2x) crossing
- Unreduced gametes in the breeding of potatoes at the diploid level
- Desynapsis and FDR 2n-egg formation in potato: its significance to the experimental induction of diplosporic apomixis in potato
- Utilizing wild potato species via Solanum phureja crosses
- The use of diploid Solanum phureja germplasm
- Advances in population breeding and its potential impact on the efficiency of breeding potatoes for developing countries
- True Potato Seed
- Unconventional Breeding Methods
- Commentary
- Index
Summary
INTRODUCTION
It is well known that haploids extracted from Solanum tuberosum ssp. tuberosum provide unique opportunities for germplasm transfer and genetic manipulation.
Haploid extraction in potato has become a routine method since Hougas & Peloquin (1957) showed that haploids are relatively easy to obtain from 4x x 2x crosses.
Haploids can be easily hybridized with most 24-chromosome tuber bearing species. The hybrids obtained are vigorous, fertile and have an improved tuberization under long-day conditions. Hermundstad (1984) found that many of the haploid tuberosum-species hybrids outyielded their haploid parents as well as some 4x cultivars.
Results on the extraction of haploids from varieties adapted to Italian conditions are reported in this paper.
MATERIALS AND METHODS
Four varieties widely grown in Italy (Desiree, Jaerla, Primura and Sirtema) were crossed with pollinator S. phureja, clone PI 1.22. All crosses were done using the technique described by Peloquin & Hougas (1958). Seedlings from the crosses were grown in the glasshouse and root-tip chromosomes were counted.
RESULTS AND DISCUSSION
The results of the pollination, in terms of fruit set, seeds, seedlings, haploid frequency and haploids per 100 fruits are presented in Table 1.
A total of 863 pollinations were made which resulted in 286 fruits, 329 seeds and 250 seedlings. More than 14% of the seedlings were found to be haploids with an average of 12.1 haploids per 100 fruit.
The ability of the clone PI 1.22 to induce haploids with the four parents used was confirmed.
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- The Production of New Potato VarietiesTechnological Advances, pp. 211 - 212Publisher: Cambridge University PressPrint publication year: 1987