Breaking the crossability barriers between disomic tetraploid Solanum acaule and tetrasomic tetraploid S. tuberosum

Euphytica ◽  
1991 ◽  
Vol 52 (3) ◽  
pp. 183-191 ◽  
Author(s):  
Masaru Iwanaga ◽  
Rosanna Freyre ◽  
Kazuo Watanabe
Keyword(s):  
Solanum Acaule ◽  
Crossability Barriers

Potato germplasm enhancement with disomic tetraploid Solanum acaule. I. Efficiency of introgression

Genome ◽  
1992 ◽  
Vol 35 (1) ◽  
pp. 53-57 ◽  
Author(s):  
Kazuo Watanabe ◽  
Carlos Arbizu ◽  
P. E. Schmiediche
Keyword(s):  
Efficient Method ◽  
Wild Species ◽  
Egg Production ◽  
Chromosome Doubling ◽  
Embryo Rescue ◽  
Germplasm Collection ◽  
2N Gametes ◽  
Germplasm Enhancement ◽  
Technical Problems ◽  
Solanum Acaule

The wild potato species Solanum acaule (acl) was used as a model of a disomic tetraploid Solanum species to develop systematic methods of germplasm enhancement for disomic tetraploid species. The objective was to develop a genetically efficient method to overcome the inherent technical problems encountered in the utilization of disomic tetraploid wild species. Accessions of acl were selected from CIP's wild germplasm collection and from the collection of University of Birmingham, with emphasis on genetic attributes such as PLRV resistance and (or) PSTV resistance. Four methods were tested: (i) triploids from crosses between 4x acl × 2x potato were selected for 2n gametes production and were crossed to tetraploids or to diploids with 2n egg production; (ii) axillary buds of triploid hybrids were treated with colchicine to double chromosome numbers to generate hexaploids; (iii) in vitro chromosome doubling to obtain hexaploids from triploid hybrids; and furthermore (iv) the selected acl clones were directly crossed to tetraploid potatoes followed by a combination of second compatible pollinations with IvP 35 and subsequent embryo rescue. The combination of second compatible pollination and embryo rescue was found to be the most genetically efficient method for the utilization of the valuable genetic attributes of acl.Key words: inter-EBN crosses, ploidy manipulation, polyploid, potato breeding, wild species

The floral abscission zone in series Acaulia and related taxa of Solanum section Petota

1998 ◽  
Vol 76 (8) ◽  
pp. 1424-1432 ◽  
Author(s):  
J P Kardolus ◽  
N Bezem
Keyword(s):  
Distinct Group ◽  
Abscission Zone ◽  
Recessive Trait ◽  
Solanum Acaule ◽  
In Series ◽  
Floral Abscission ◽  
Solanum Section Petota ◽  
Section Petota ◽  
Wild Potatoes

Species of the genus Solanum usually possess pedicels with a floral abscission zone, which is designated the "articulation" or "joint." A distinct group of tuber-bearing wild potatoes, series Acaulia, is characterized by an indistinct or completely absent articulation. The anatomy of pedicels without articulation is compared with that of articulated pedicels. No abscission zone is observed in pedicels without an articulation, a situation found in the tetraploids Solanum acaule Bitter ssp. acaule and S. acaule ssp. punae (Juz.) Hawkes & Hjert. The hexaploids Solanum albicans (Ochoa) Ochoa and S. acaule ssp. palmirense Kardolus of series Acaulia have an anatomically incompletely differentiated abscission zone. Solanum acaule ssp. aemulans (Bitter & Wittm.) Hawkes & Hjert. (2n = 48) has articulated pedicels and a floral abscission zone. The absence of a floral abscission zone is presumably a recessive trait. The special features of pedicel articulation in series Acaulia are discussed in relation to the "jointless" mutations in tomato. The position of the articulation on the pedicel is concluded to be less significant for taxonomy than generally considered.Key words: Solanaceae, Solanum acaule, anatomy, "jointless" mutation, pedicel articulation, taxonomy.

scholarly journals Potencial de resistencia a virus en especies silvestres de Solanum

2016 ◽  
Vol 3 (1) ◽  
pp. 20-29
Author(s):  
Gilberto Rodríguez ◽  
Carlos Ochoa ◽  
Luis F. Salazar
Keyword(s):  
Solanum Acaule

Se evaluó la reacción de plántulas de 67 entradas de especies silvestres de Solanum a los virus: enrollamiento de la hoja (PLRV), virus Y de la Papa (PVY), virus X de la Papa (PVX), virus S de la Papa (PVS), virus Latente de los Andes (APLV), virus Moteado Andino (APMV) y al viroide del Tubérculo Ahusado (PSTVd). Se probaron: 33 entradas de Solanum acaule, 9 de S. bukasovii, 5 de S. colombianum, 2 de S. chomatofilum, 1 de S. coelestispetalum, 2 de S. marinasense, 2 de S. raphanifolium, 1 de S. tundalomense y 12 entradas no identificadas. Los estudios se realizaron entre 1980-1984 en las instalaciones del Centro Internacional de la Papa (CIP), La Molina, Lima-Perú. Por las reacciones observadas se establecieron tres categorías o tipos de reacción: susceptibilidad, tolerancia y alta resistencia. S. acaule resultó ser altamente resistente para PLRV, PVY (inoculación mecánica de jugo infeccioso), PVX y PVS. Para APLV, la entrada OCH-13389 (espécimen no identificado) se mostró con alta resistencia. 

Solanum acaule (Wild potato)

2019 ◽  
pp. 2243-2244
Author(s):  
K. Subramanya Sastry ◽  
Bikash Mandal ◽  
John Hammond ◽  
S. W. Scott ◽  
R. W. Briddon
Keyword(s):  
Wild Potato ◽  
Solanum Acaule

Tetrahaploids from colchicine-induced octaploid Solanum acaule subsp. Aemulans

Euphytica ◽  
1971 ◽  
Vol 20 (4) ◽  
pp. 490-492
Author(s):  
J. G. Th. Hermsen
Keyword(s):  
Solanum Acaule
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