Potato cytogenetics and germplasm utilization

Peloquin, S. J.; Jansky, Shelley; Yerk, G. L.

doi:10.1007/bf02853983

Cited by 45 publications

(18 citation statements)

References 18 publications

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“…Stringent selection criteria that result in strong selection intensities may be used confidently if selection occurs within more genetic variable populations. Sexual polyploidization is an efficient method to increase genetic variation for traits of economic importance (Peloquin et al 1989). Favourable alleles for cold chipping are present within diverse diploid wild potato species (Hanneman 1993, Hayes and Thill 2002b and can be transmitted efficiently to 4x progeny via 2n gametes in 4x)2x crosses (Hayes and Thill 2001).…”

Section: Discussionmentioning

confidence: 99%

Genetic gain from early generation selection for cold chipping genotypes in potato

Hayes

Thill

2003

Plant Breeding

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Early generation selection for chip colour may accelerate potato chipping cultivar development. The research objective was to measure the response from early generation selection for light potato chip colour. Progeny from 175 4×× 4× families were propagated to the field using greenhouse grown tubers or seedling transplants. Tubers from progeny were made into potato chips after 3 and 6 months’ storage at 4° C. Chip colour was rated as 1 = light to 10 = dark. Genotypes were categorized as retained (≥ 4) or discarded (> 4) based on the 6‐month chip colour, then field grown a second year at two locations and re‐evaluated for chip colour. Positive selection responses resulted, but were lower in the seedling transplants. Interaction between genotype and environment, and genotype and storage duration reduced responses. Selected genotypes should be evaluated over multiple environments and storage conditions to insure reliable performance. Expanding variation by introgressing favourable alleles from wild species may further enhance breeding success.

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Section: Discussionmentioning

confidence: 99%

Genetic gain from early generation selection for cold chipping genotypes in potato

Hayes

Thill

2003

Plant Breeding

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“…Some groups of species are separated by strong crossing barriers, governed by a littleunderstood process involving ratios of maternal/paternal genomes in the endosperm, and evidenced by endosperm breakdown (the Endosperm Balance Number or EBN hypothesis [Johnston et al, 1980;Johnston andHanneman, 1980, 1982; Table 1]). Sexual gene transfer, however, can still be accomplished between species with different ploidy and EBN levels by means ofchromosome manipulations involving haploids, 2n gametes, EBN numbers, bridging species, double pollinations, embryo rescue (Hermsen and Ramanna, 1973;Ehlenfeldt and Hanneman, 1984;Hanneman and Ehlenfeldt, 1984;Chavez, Brown, and Iwanaga, 1988;Peloquin, Jansky, and Yerk, 1989;Singsit and Hanneman, 1991). Clades 1, 2, and 3 all possess species with only 2n = 24 (1EBN).…”

Section: Additional Phyletic Insights-mentioning

confidence: 99%

Chloroplast DNA Evidence for Genome Differentiation in Wild Potatoes (Solanum Sect. Petota: Solanaceae)

Spooner

Sytsma

Conti

1991

American Journal of Botany

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Chloroplast DNA restriction site analysis has been used to test Hawkes's phylogenetic interpretations of the genomic data in So/anum sect. Petota. Hawkes hypothesized a diploid (2n = 24) origin of the tuber-bearing members of this group (subsection Potatoe) in Mexico and Central America (as a B genome) with later migrations and evolution to an A genome in South America, later followed by a return migration of the A genome to Mexico and Central America with A x B hybridizations and polyploidizations to produce ser. Longipedice//ata (4x) and Demissa (6x). Our results provide partial support for this hypothesis by demonstrating the paraphyletic and primitive nature of the B genome species group, and the monophyletic and derived nature of all A genome and A x B genome species, including S. verrucosum, a hypothesized A genome progenitor of ser. Demissa. Thus, the Mexican and Central American polyploid species must have obtained their cytoplasm from the A genome. However, our results question the Stellata/Rotata hypothesis ofHawkes and the taxonomic placement ofS. chomatophi/um in ser. Conicibaccata.

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“…The basis of very high yields in progeny from particular 4x x 2x crosses resides primarily in the method of 2n pollen (diplandroid) formation in the diploid parent (Peloquin et al, 1989a). Cytological examination of microsporocytes revealed that in many cells the metaphase II meiotic spindles were parallel, rather than oriented as they are normally where the poles of the two spindles define a tetrahedron.…”

Section: Introductionmentioning

confidence: 98%

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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Potato cytogenetics and germplasm utilization

Cited by 45 publications

References 18 publications

Genetic gain from early generation selection for cold chipping genotypes in potato

Genetic gain from early generation selection for cold chipping genotypes in potato

Chloroplast DNA Evidence for Genome Differentiation in Wild Potatoes (Solanum Sect. Petota: Solanaceae)

The reproductive biology of the potato and its implication for breeding

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