Use of 2x Tuberosum haploid-wild species hybrids to improve yield and quality in 4x cultivated potato

Darmo, Elizabeth; Peloquin, S. J.

doi:10.1007/bf00032025

Cited by 19 publications

(9 citation statements)

References 21 publications

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“…Therefore, only a limited fraction of the immense 2x Solanum germplasm has been effectively exploited via the USP breeding scheme (Tai 1994). The first set of field trials using 4x hybrid families derived from haploid Tuberosum-S. berthaultii or haploid Tuberosum-S. tarijense hybrids indicated the high potential value of this germplasm for introgressing important yield and quality traits into the 4x potato gene pool (Darmo and Peloquin 1991). In the present work, more information is provided on the performance of S. berthaultii-and S. tarijense-derived germplasm as staminate (male) parents in 4x)2x crosses.…”

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confidence: 76%

Tuber yield and quality of 4x‐2x (FDR) potato progenies derived from the wild diploid species Solanum berthaultii and Solanum tarijense

et al. 2003

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Field experiments were carried out in order to evaluate 4x)2x families derived from crosses between elite 4x potato cultivars and 2x Tuberosum-Solanum tarijense and 2x Tuberosum-Solanum berthaultii clones. Three traits were assessed: total tuber yield (TTY), haulm maturity (HM) and general tuber appearance (GTA). The degree of heterosis of these hybrid families was evaluated by comparison with the respective 2x and 4x parents as well as with seven 4x cultivars. The parental haploid species hybrids derived from S. berthaultii and S. tarijense combined two or more positive horticultural characteristics. Expressed as yield percentage of the 4x parents, the TTY of the families ranged from 53% to 246%. For TTY, the best 4x)2x hybrid family ranked better than seven out of nine elite 4x cultivars. Some families had GTA scores in the range of the highly selected 4x cultivars. The families, however, were generally later maturing than the 4x parent group. Specific combining ability for TTY and GTA were the only two significant sources of variation observed in this genetic material. Parent-offspring correlation coefficients were low for all traits, and indicated that parental performance would not be informative at either ploidy level. These results parallel previous investigations with distinct haploid species hybrids where a 4x)2x breeding scheme was found to be an effective strategy for increasing progeny TTY over the 4x parents. However, the high degree of heterosis for TTY along with good GTA scores observed in certain cross combinations derived from these unadapted 2x species was a somewhat surprising result. Thus far, the importance of these two South American wild potato species, from the potato-breeding standpoint, has been limited to the fact that they are natural reservoirs of major genes controlling resistance against important diseases and insects. However, the level of performance of some 4x)2x families in comparative assays with elite cultivars suggests the unanticipated possibility of introgressing genetic factors from S. berthaultii and S. tarijense with positive effects on quantitative traits of horticultural importance along with these major resistance genes.

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confidence: 76%

Tuber yield and quality of 4x‐2x (FDR) potato progenies derived from the wild diploid species Solanum berthaultii and Solanum tarijense

et al. 2003

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“…2n gametes formed by parallel spindles, a process equivalent to first division restitution (FDR) (Mok & Peloquin, 1975a), result in maximum heterotic response because about 80% of the total heterozygosity of the parent and much of the epistatic interactions are transferred intact. Heterosis has been reported for total tuber yield, marketable yield and total solids/specific gravity in such crosses (Buso, 1986;Darmo & Peloquin, 1991;DeJong et al, 1981;Hutten et al, 1994;Masson & Peloquin, 1987;McHale & Lauer, 1981;Mok & Peloquin, 1975b). It has also been shown that there is no significant difference in yield, haulm maturity, vigour, uniformity, eye depth, number of tubers per hill and commercial over total yield index between families produced by parents with FDR without crossing over compared with those by parents with FDR with crossing over (Buso et al, 1999).…”

Section: Application To Potato Improvementmentioning

confidence: 90%

“…These authors suggested that it is possible to determine the value of different species, PI's within species and plants within a PI for their contribution to tuber characteristics (Hermundstad & Peloquin, 1987). Results from the use of haploid wild species (particularly S. tarijense) hybrids as 2x parents in 4x-2x crosses has resulted in many clones with good tuber yields and excellent general tuber appearance (Darmo & Peloquin, 1991). These clones were also noted to have good specific gravity and chip color, which are valuable traits for processing.…”

Section: Application To Potato Improvementmentioning

confidence: 96%

The reproductive biology of the potato and its implication for breeding

HannemanJr

1999

Potato Res

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Horticulture, University of Wisconsin-Madison, a mentor, friend and colleague, in recognition of the enormous contributions he has made to this area and for his enthusiasm for and stimulation of others to an awareness of the importance of its application to plant improvement.Additional keywords: 2n gametes, synaptic mutants, stylar barriers, Endosperm Balance Number, EBN, interspecific hybridization, introgression, imprinting, Solarium spp. SummaryHaploidy, 2n gametes, synaptic mutants, stylar barriers, endosperm barriers. Endosperm Balance Number (EBN) and its relationship to 2n gametes, stylar barriers and disomic genetics are a part of the reproductive biology of potato. Also all are tools for isolation and preservation of a species identity. Haploidy and 2n gametes allow for interploidy gene transfer. "Parallel spindles and synaptic mutants permit the transfer of entire parental genomes intact and are powerful tools in potato breeding. Stylar barriers provide a mechanism for interspecific isolation via unilateral incompatibility. Incongruity has also been invoked. Endosperm barriers have been discussed in terms of EBN which requires a 2 maternal:l paternal ratio in the endosperm for successful seed development. Genetic models suggesting three unlinked genes in a threshold-like system and a two gene system have been proposed. A relationship may exist between EBN and stylar barriers. The use and manipulation of 2n gametes, stylar barriers and EBN have been used effectively in germplasm transfer from species to cultivated potato.

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“…Direct hybridization of members of this improved diploid S. phureja × S. stenotomum population with tetraploid S. tuberosum cultivars resulted in tetraploid hybrids superior in both marketable and total yield, with more tubers per plant and slightly lesser mean tuber weights (Carroll and De Maine 1989). Crossing of cultivated tetraploid 'Norgleam' × wild diploid specie (W5279-4) was accomplished, and resulted in the release of the now popular 'Yukon Gold' (Johnston and Rowberry 1981) and identification of other superior clones with lighter chip colour and generally good tuber appearance (Lauer et al 1988;Darmo and Peloquin 1991). Tetraploid cultivars were also produced by crossing diploid × dihaploid species of S. tuberosum followed by recurrent phenotypic mass selection of the tetraploid hybrids (Bradshaw and Mackay 1994).…”

Section: Techniques For Potato Improvementmentioning

confidence: 98%