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  • 1
    Electronic Resource
    Electronic Resource
    Frequency of 2n pollen in diploid hybrids betweenSolanum phureja Juz. & Buk. andSolanum chacoense Bitt. (1992)
    Springer
    Potato research 35 (1992), S. 161-172 
    Details
    ISSN: 1871-4528
    Keywords: environmental effects ; interspecific hybrids ; potato ; unreduced gametes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Solanum phureja (PP)xSolanum chacoense (CC) hybrid families (PC) were evaluated for pollen fertility and frequency of 2n pollen in two seasons in Morocco. PP clones produced high frequencies of 2n pollen, whereas CC clones produced none. The percentage of plants with 2n pollen ranged from 2 to 63% among 20 PC families and was consistent in some PC families over two growing seasons, whereas others varied between fall and spring growing seasons. The expected ratio of 2n to non-2n pollen-producers within a PC family based on a single recessive gene model [i.e. 1∶0 with CC homozygous dominant (PsPs) or 1∶1 with CC heterozygous (Psps)] was observed in only 5 of 20 progenies. Narrow sense heritability was 0.71, allowing gain from further selection. Only clones producing more than 10% 2n pollen exhibited more stable expressivity across seasons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02357610
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  • 2
    Electronic Resource
    Electronic Resource
    Enhancement of diploid Solanum chacoense Bitt. using adapted clones of Solanum phureja Juz. & Buk. (1993)
    Springer
    Euphytica 68 (1993), S. 169-179 
    Details
    ISSN: 1573-5060
    Keywords: potato ; diploid ; Solanum phureja ; Solanum chacoense ; analytic breeding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary F1 hybrids between Solanum phureja and S. chacoense were studied in a new approach to enhance wild diploid potato species using adapted S. phureja clones as the female parent. S. chacoense parents had few tubers, whereas S. phureja parents had been previously selected for tuberization under long days. Twenty hybrid families were evaluated for haulm vigor, vine maturity, stolon development, frequency of tuberization, tuber set, tuber yield and average tuber weight under naturally occurring increasing or decreasing photoperiods in spring and fall growing seasons in Morocco. The hybrid plants were more vigorous, later maturing with thicker stolons in the spring season. Frequency of tuberization and tuber set did not vary with season. Tuber yield and average tuber weight were higher in fall; the maximum yield was 2.4 and 4.6 kg per hill under spring and fall conditions, respectively. Remarkable variation was found both between and within hybrid families for all traits in this first cycle of enhancement. The selection of vigorous, fertile clones incorporating the S. chacoense genome is possible by using S. phureja as an adapted germplasm source.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00029870
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