RB and Ph resistance genes in potato and tomato minimize risk for oospore production in the presence of mating pairs of Phytophthora infestans

Sanchez-Perez, Amilcar; Halterman, Dennis; Jordan, Stephen A; Chen, Yu; Gevens, A. J.

doi:10.1007/s10658-017-1233-6

Cited by 1 publication

(1 citation statement)

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“…In 2009, the US observed a dramatic change in the occurrence of certain P. infestans lineages, with US-23 and US-24 strains essentially replacing the US-8 strain [38]. Potato cultivars Defender [39] and Jacqueline Lee [40], which were only bred for resistance to the US-8 strain of late blight, express weak resistance to the US-23 and US-24 strains [41], rendering them less desirable for commercial production.…”

Section: Disease Resistancementioning

confidence: 99%

Potato Germplasm Enhancement Enters the Genomics Era

2019

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The goal of germplasm enhancement is to introgress traits from wild crop relatives into cultivated material and eventually cultivars. It seeks to restore genetic diversity that has been lost over time or to augment cultivated material with novel alleles that improve parents in breeding programs. This paper discusses potato germplasm enhancement efforts in the past, focusing on effective examples such as disease resistance and processing quality. In addition, it outlines new strategies for enhancement efforts, shifting the focus from evaluating phenotypes to tracking and manipulating specific DNA sequences. In the genomics era, germplasm enhancement will increasingly be focused on identifying and introgressing alleles rather than traits. Alleles will come from a broad pool of genetic resources that include wild species relatives of potato, landraces, cultivated potato itself, and distantly-related species. Genomics tools will greatly increase the efficiency of introgressing multi-genic traits and will make it possible to identify rare alleles and utilize recessive alleles.

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