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Article
Megachip — a new potato variety for chip**
‘MegaChip’ is a medium-late variety for chip**, with round-oval tubers of white tan skin and white flesh. MegaChip has consistently shown good to high yield potential. The tubers bulk early and produce a goo...
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Article
White Pearl—A chip** potato variety with high level of resistance to cold sweetening
White Pearl is a chip** cultivar with high level of resistance to cold sweetening. The cold-chip** capacity of White Pearl is better than the current chip** cultivars, including Atlantic, Snowden and Nor...
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Article
Millennium Russet: A dual purpose russet potato variety
Millennium Russet is a medium-late variety with long tubers having light russet skin and white flesh. It has potential as a fresh market and processing (french fries) variety. The tuber type of Millennium Russ...
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Article
Substitutes for genome differentiation in tuber-bearing Solanum: interspecific pollen-pistil incompatibility, nuclear-cytoplasmic male sterility, and endosperm
The cultivated potato, Solanum tuberosum L. (2n=4x=48), has a very large number of related wild and cultivated tuber-bearing species widely distributed in the Americas. These species, grouped in 16 taxonomic seri...
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Article
Red Pearl: A new gourmet red potato variety
Red Pearl is a medium-late variety with round tubers of stable dark red skin and white flesh. It is an ideal gourmet and canning variety due to its high tuber set and high proportion of tubers less than 4.76 c...
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Article
Assessment under short-day conditions of genetic materials derived from three potato breeding strategies: 4x-4x (intra-Tuberosum), 4x-2x (FDR 2n-pollen), and 4x-4x (diplandrous tetraploid)
Families and cultivars derived from three breeding strategies [the conventional 4x-4x (intra-Tuberosum), the interploid 4x (Tub)-2x (Phureja-haploid Tub), and 4x (Tub)-4x (diplandrous tetraploid-DTO)] were evalua...
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Article
Red companion: A new red potato variety for fresh market
Red Companion is a medium-early maturing variety with round tubers, stable red skin, and white flesh. Its intended use is as a tablestock variety. Red Companion has consistently outyielded Dark Red Norland in ...
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Article
AC Glacier Chip: A High-yielding Chip Cultivar for Long-term Storage
AC Glacier Chip has a maincrop maturity, higher yields than Snowden and excellent quality (color and dry matter) for the chip industry. The tubers are oval and very uniform in size with white flesh. It perform...
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Article
Direct estimation of the effects of meiotic recombination on potato traits via analysis of 4x-2x progenies from synaptic mutants with 2n-pollen formation by FDR without crossing-over
Diploid potato clones with 2n-pollen formation by first-division restitution without crossing-over (FDR-NCO) are ideal testers to estimate the breeding value of elite 4x cultivars by virtue of transmitting their ...
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Article
Comparison of haploid Tuberosum-Solanum chacoense versus Solanum phureja-haploid Tuberosum hybrids as staminate parents of 4x–2x progenies evaluated under distinct crop management systems
The relative value of haploid Tuberosum-Solanum chacoense (TCH) vs. Solanum phureja-haploid Tuberosum (PTH) hybrids as male parents in 4x–2x crosses was estimated under two distinct crop management systems. The f...
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Article
Multitrait selection system using populations with a small number of interploid (4x-2x) hybrid seedlings in potato: Degree of high-parent heterosis for yield and frequency of clones combining quantitative agronomic traits
One of the most attractive features of the 4x-2x breeding scheme via unilateral sexual polyploidization (USP) is the possibility of obtaining heterotic clones with a combination of desirable traits based upon se...
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Article
Effects of 2n-pollen formation by first meiotic division restitution with and without crossover on eight quantitative traits in 4x-2x potato progenies
The 2n-pollen grains formed by first-division restitution without crossover (FDR-NCO) are unique breeding tools, since they can transmit almost 100% of non-additive genetic effects from the parent to the prog...
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Article
Male sterility and 2n pollen in 4x progenies derived from 4x×2x and 4x×4x crosses in potatoes
The objectives of these experiments were to evaluate male sterility (MS) and 2n pollen frequency in 77 4x×2x families and 26 4x×4x families. The 2x parents were haploid-species hybrids and the 4x parents mainl...
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Article
Performance of true potato seed families. 1. Effect of level of inbreeding
Successive generations of open pollinated (OP) true potato seed (TPS) families represent a low-cost planting material. This study was conducted to determine whether inbreeding occurred during two successive OP...
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Article
Performance of true potato seed families. 2. Comparison of transplants vs. seedling tubers
A potato crop can be grown from true potato seed (TPS) either by transplanting seedlings to the field (seedling transplants) or by planting tubers derived from seedlings (seedling tubers). The effect of the pl...
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Article
Breeding for 2n egg production in haploid × species 2x potato hybrids
The identification of diploid(2x), Tuberosum haploid × wild species hybrids (HS) which produce high frequencies of 2n eggs and have good tuber appearance is important for obtaining 4x progeny from 2x × 2x cros...
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Article
The occurrence and frequency of 2n pollen in 2x, 4x, and 6x wild, tuber-bearing Solanum species from Mexico, and Central and South America
The occurrence of 2n pollen-producing plants was investigated in 187 plant introductions (PIs) of 38 wild species of tuber-bearing Solanum. These 2x, 4x, and 6x species are from Mexico, and Central and South Amer...
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Article
Use of 2x Tuberosum haploid-wild species hybrids to improve yield and quality in 4x cultivated potato
The 4x × 2x(FDR) breeding method utilizes 2x (Tuberosum haploid × 2x relatives) potato hybrids which produce 2n pollen by an FDR mechanism. About 80 percent of 2x parental heterozygosity and most epistasis is ...
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Article
Performance and stability of nine 4x clones from 4x−2x crosses and four commercial cultivars
Nine clones from 4x−2x crosses were evaluated along with four cultivars in six Wisconsin environments. The 4x clones from 4x−2x crosses had as their 2x parents hybrids with haploid Tuberosum and either Group P...
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Article
Pollen fertility in relation to open pollinated true seed production in potatoes
The cost and difficulty of producing hybrid true potato seed (TPS) currently limits their use for commercial production. Twelve clones, selected in preliminary trials for low pollen stainability but high fruit...
