Harimaru: a new potato variety for a local specialty

Abstract

‘Harimaru’ is a new potato variety bred from a cross between ‘Saikai 35’ as a female parent and ‘Pike’ as a male parent. Marker selection was performed for 1,647 seedlings to combine resistance genes to late blight (R1), Potato virus Y (Rychc), Potato virus X (Rx1), and golden cyst nematode (H1). In total, 194 selected clones were evaluated in the field, among which the best clone was officially released as ‘Harimaru’. Its yield was slightly lower than the local standard variety, ‘May Queen’. However, it produces tasty potatoes, that do not become mushy with long boiling times despite its high starch content. ‘Harimaru’ may become a local specialty potato and its multiple resistance to potato viruses may allow cultivation using homemade seed tubers from the previous season’s crop.

Broadening Genetic Diversity of the Japanese Potato Gene Pool

“…Ten 4x taradg hybrids obtained from crosses of S. tarijense used as female parents and Andigena as male parents (Hosaka et al 2018) were also used, which have T-type cytoplasm derived from S. tarijense but are male and female fertile. These were crossed with a breeding clone, 10H17, which was derived from a cross of Saikai 35 (Mori et al 2012) as its female parent with a US variety Pike (Plaisted et al 1998) as its male parent, and was a sister clone of Harimaru (Fujimatsu et al 2018), both having S. phureja-derived P-type cytoplasm and good male and female fertilities. In addition, 10H17 has resistance genes to cyst nematode (H1), Potato virus X (Rx1), Potato virus Y (Ry chc ), and late blight (R1).…”

“…However, R1 was derived unilaterally from Pike into 10H17 (Fujimatsu et al 2018) and is less likely to be found among Andigena accessions because R1 was originally derived from a Mexican hexaploid wild species S. demissum (Ross 1986). The R1 marker band was also significantly overrepresented in the population of Saikai 35 × Pike, to which poor PCR conditions were suggested (Fujimatsu et al 2018). The most likely explanation would be a genetic linkage between R1 and either H1 or a maturity-related trait.…”

SCREENING OF RUSSIAN POTATO CULTIVARS (Solanum tuberosum L.) WITH DNA MARKERS LINKED TO THE GENES CONFERRING EXTREME RESISTANCE TO POTATO VIRUS Y

“…На современном этапе для создания высокоустойчивых к PVY сортов картофеля широко применяется маркер-опосредованная селекция (marker assisted selection, MAS) с помощью ДНК маркеров, сцепленных с Ryгенами (внутригенные маркеры пока не разработаны), что повышает эффективность селекционного процесса (31,(34)(35)(36). Кроме того, маркеры генов Ry sto /Ry-f sto (22,(37)(38)(39), Ry adg (38,40), Ry chc (11,40) применяются для оценки разнообразия селекционного генофонда, предоставляя информацию о генетической защищенности или уязвимости сортов (11,22,(37)(38)(39)(40) Поиск эффективных маркеров целевых генов остается актуальным в связи с перспективами маркер-опосредованной селекции.…”

“…andigenum наиболее часто использовались в селекционных программах в США (29,30), Испании (31) и Перу (32,33). Cелекционеры Японии для создания высокоустойчивых к PVY сортов чаще всего привлекали образцы S. chacoense (11,12,34,35). Устойчивые образцы S. chacoense активно использовались и в российских селекционных программах (26-28).…”

“Breeding on Mountains” Resulted in the Reorganization of Endophytic Fungi in Asexually Propagated Plants (Ligusticum chuanxiong Hort.)

“…The quantity and quality of offspring of vegetatively propagated crops are limited by pathogens (mainly viruses and endogenous pathogens). These pathogens accumulate in successive rounds of vegetative propagation, which severely restricts quantity and germplasm exchange between populations, resulting in catastrophic reductions in amount or extinction, which is called asexual reproduction complication ( Perrier et al, 2011 ; Hola et al, 2014 ; Ploetz, 2015 ; Fujimatsu et al, 2018 ; Hameed et al, 2018 ; Baebler et al, 2020 ).…”