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Ramón, Miguel Calvo; Hanneman, R. E.

doi:10.1023/a:1020342908558

Cited by 23 publications

(3 citation statements)

References 37 publications

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“…Rescue pollination is particularly important when the aim is to circumvent restricting barriers, such as the EBN. While previous studies (Ramon & Hanneman, 2002;Singsit & Hanneman, 1991;Watanabe et al, 1995) highlighted mentor pollen's role in preventing premature fruit drop and promoting hybrid seed formation, the impact of double pollination on embryo survival and fruit formation remains debated (Yermishin et al, 2014). In our study, double pollination with IvP101 increased fruit formation, but had no effect on the number of rescued embryos or surviving plantlets.…”

Section: Discussioncontrasting

confidence: 54%

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A case study of potato germplasm enhancement using distant late blight resistant wild relatives

et al. 2023

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Improving potato late blight (LB) resistance is essential for ensuring food security, particularly using wild relatives endemic to Phytophthora infestans‐prone regions. However, reproductive barriers can impede the transfer from potato wild relatives (PWR) to the cultivated genepool. This study sought to incorporate potentially novel LB resistance from wild diploid accessions of Series Piurana (Solanum chiquidenum, Solanum paucissectum, and Solanum piurae), Tuberosa (Solanum cajamarquense), and Megistracroloba (Solanum sogarandinum) into tetraploid potato. Trough rescue pollination, 699 diploid interspecific hybrids were obtained, of which 385 displayed LB resistance in two endemic environments. Based on a comprehensive evaluation, including assessing 2n pollen production, 14 diploid interspecific hybrids were selected to continue the introgression process. These pre‐bred stocks were then used in interploidy (4x‐2x) crosses to incorporate their LB resistance in the cultivated tetraploid background. Assessment of 1978 genotypes resulting from interploidy crosses under endemic disease pressure yielded 717 hybrids with moderate to high levels of LB resistance. Evaluation of pollen viability and ploidy revealed moderate fertility and predominantly tetraploid genotypes. Reassessment of LB resistance on this new subset of hybrids further identified 214 genotypes with sustained resistance. Among them, 12 tetraploid hybrids with low glycoalkaloid content, favorable agronomic, and post‐harvest attributes were identified as crossing‐friendly stocks. Notably, 11 of these hybrids were derived from S. cajamarquense and one from S. sogarandinum. These promising 4x hybrids are now primed to be incorporated into potato breeding programs.

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Section: Discussioncontrasting

confidence: 54%

“…This technique, referred to as rescue pollination, involves double pollination with a mentor pollen followed by embryo rescue. Previous studies (Ramon & Hanneman, 2002;Singsit & Hanneman, 1990) have described this approach.…”

Section: Crop Sciencementioning

confidence: 99%

A case study of potato germplasm enhancement using distant late blight resistant wild relatives

et al. 2023

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“…However, several attempts to exploit the resistance in S. pinnatisectum have been undertaken. A single aneuploid hybrid between S. pinnatisectum and S. tuberosum was obtained by double pollination and embryo rescue and it was shown to be resistant to late blight (Ramon and Hanneman 2002). Somatic hybridization has been used successfully several times in order to transfer late blight resistance from S. pinnatisectum to S. tuberosum (Thieme et al 1997; Szczerbakowa et al 2005; Greplová et al 2008; Polzerová et al 2010), although only one of the obtained resistant hybrids was further backcrossed to S. tuberosum (Thieme et al 1997).…”

Section: Introductionmentioning

confidence: 99%

A resistance gene against potato late blight originating from Solanum × michoacanum maps to potato chromosome VII

et al. 2011

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Solanum × michoacanum (Bitter.) Rydb. is a diploid, 1 EBN (Endosperm Balance Number) nothospecies, a relative of potato originating from the area of Morelia in Michoacán State of Mexico that is believed to be a natural hybrid of S. bulbocastanum × S. pinnatisectum. Both parental species and S. michoacanum have been described as sources of resistance to Phytophthora infestans (Mont.) de Bary. The gene for resistance to potato late blight, Rpi-mch1, originating from S. michoacanum was mapped to the chromosome VII of the potato genome. It confers high level of resistance since the plants possessing it showed only small necrotic lesions or no symptoms of the P. infestans infection and we could ascribe over 80% of variance observed in the late blight resistance test of the mapping population to the effect of the closest marker. Its localization on chromosome VII may correspond to the localization of the Rpi1 gene from S. pinnatisectum. When mapping Rpi-mch1, one of the first genetic maps made of 798 Diversity Array Technology (DArT) markers of a plant species from the Solanum genus and the first map of S. michoacanum, a 1EBN potato species was constructed. Particular chromosomes were identified using 48 sequence-specific PCR markers, originating mostly from the Tomato-EXPEN 2000 linkage map (SGN), but also from other sources. Recently, the first DArT linkage map of 2 EBN species Solanumphureja has been published and it shares 197 DArT markers with map obtained in this study, 88% of which are in the concordant positions.Electronic supplementary materialThe online version of this article (doi:10.1007/s00122-011-1715-4) contains supplementary material, which is available to authorized users.

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