Cytology and leafspot resistance in Arachis hypogaea x wild species hybrids

Euphytica ◽  
1982 ◽  
Vol 31 (3) ◽  
pp. 885-893 ◽  
Author(s):  
M. Company ◽  
H. T. Stalker ◽  
J. C. Wynne
Keyword(s):  
Arachis Hypogaea ◽  
Wild Species ◽  
Species Hybrids

scholarly journals Successful crosses between fungal-resistant wild species of Arachis (section Arachis) and Arachis hypogaea

2015 ◽  
Vol 38 (3) ◽  
pp. 353-365 ◽  
Author(s):  
Alessandra Pereira Fávero ◽  
Rodrigo Furtado dos Santos ◽  
Charles E. Simpson ◽  
José Francisco Montenegro Valls ◽  
Natal Antonio Vello
Keyword(s):  
Arachis Hypogaea ◽  
Wild Species

A genetic model for tuberization in potato haploid-wild species hybrids grown under long-day conditions

2004 ◽  
Vol 81 (5) ◽  
pp. 335-339 ◽  
Author(s):  
Shelley H. Jansky ◽  
Georgia L. Davis ◽  
Stanley J. Peloquin
Keyword(s):  
Wild Species ◽  
Genetic Model ◽  
Long Day ◽  
Species Hybrids

Occurrence and mechanisms of 2n egg formation in 2x potato

Genome ◽  
1991 ◽  
Vol 34 (6) ◽  
pp. 975-982 ◽  
Author(s):  
Joanna E. Werner ◽  
Stanley J. Peloquin
Keyword(s):  
Wild Species ◽  
Seed Set ◽  
2N Gametes ◽  
Origin And Evolution ◽  
First Division Restitution ◽  
Egg Formation ◽  
Second Division Restitution ◽  
2N Eggs ◽  
Haploid Species ◽  
Species Hybrids

The occurrence of 2n eggs in 381 haploids from six tetraploid parents and in 127 plants representing five diploid wild species was detected using 2x × 4x crosses. Sixty-two percent of the haploids and 24% of the wild-species plants produced 2n eggs. Twenty-six haploids and 17 species plants that gave high seed set in 2x × 4x crosses were examined cytologically to determine the frequency and mechanisms of 2n egg formation. There was significant variation in the frequency of 2n eggs among haploids (7–57%) and among species plants (4.9–57.3%). Five mechanisms of 2n egg formation were identified: synaptic variant (genetically first division restitution); delayed meiotic division (first division restitution and second division restitution); omission of the second division (the prevalent mechanism, second division restitution); irregular anaphase II (second division restitution); and failure of second cytokinesis (second division restitution). 2n eggs can be formed by more than one mechanism within a clone. The occurrence of 2n eggs in wild species and the higher frequency of 2n eggs in haploids than in wild species indicate that sexual polyploidization has been involved in the origin and evolution of polyploid series in potato. The high frequency of 2n eggs in both haploids and diploid wild species allows generation of haploid-species hybrids that produce 2n eggs. These hybrids can then be used in the 2x × 4x and 2x × 2x breeding schemes.Key words: haploids, wild species, 2n gametes, first division restitution, second division restitution.

Male fertility and 2n pollen production in haploid-wild species hybrids

1985 ◽  
Vol 62 (9) ◽  
pp. 479-487 ◽  
Author(s):  
Shelley A. Hermundstad ◽  
S. J. Peloquin
Keyword(s):  
Wild Species ◽  
Male Fertility ◽  
Pollen Production ◽  
2N Pollen ◽  
Species Hybrids

scholarly journals A study of the relationships of cultivated peanut (Arachis hypogaea) and its most closely related wild species using intron sequences and microsatellite markers

2012 ◽  
Vol 111 (1) ◽  
pp. 113-126 ◽  
Author(s):  
Márcio C. Moretzsohn ◽  
Ediene G. Gouvea ◽  
Peter W. Inglis ◽  
Soraya C. M. Leal-Bertioli ◽  
José F. M. Valls ◽  
...  
Keyword(s):  
Microsatellite Markers ◽  
Arachis Hypogaea ◽  
Wild Species ◽  
Cultivated Peanut ◽  
Related Wild Species

Use of 2x Tuberosum haploid-wild species hybrids to improve yield and quality in 4x cultivated potato

Euphytica ◽  
1991 ◽  
Vol 53 (1) ◽  
pp. 1-9 ◽  
Author(s):  
E. Darmo ◽  
S. J. Peloquin
Keyword(s):  
Wild Species ◽  
Cultivated Potato ◽  
Yield And Quality ◽  
Species Hybrids

scholarly journals Utility of EST-derived SSR in cultivated peanut (Arachis hypogaea L.) and Arachis wild species

2009 ◽  
Vol 9 (1) ◽  
pp. 35 ◽  
Author(s):  
Xuanqiang Liang ◽  
Xiaoping Chen ◽  
Yanbin Hong ◽  
Haiyan Liu ◽  
Guiyuan Zhou ◽  
...  
Keyword(s):  
Arachis Hypogaea ◽  
Wild Species ◽  
Arachis Hypogaea L ◽  
Cultivated Peanut

Effects of pre-breeding wild species on tuberization ofSolanum tuberosum haploid-wild species hybrids

1989 ◽  
Vol 66 (12) ◽  
pp. 803-811 ◽  
Author(s):  
T. L. Jacobsen ◽  
S. H. Jansky
Keyword(s):  
Wild Species ◽  
Species Hybrids

scholarly journals Resistance of Wild Species of Arachis to the Twospotted Spider Mite, Tetranychus Urticae1,2,3

1977 ◽  
Vol 4 (1) ◽  
pp. 9-11 ◽  
Author(s):  
D. R. Johnson ◽  
J. C. Wynne ◽  
W. V. Campbell
Keyword(s):  
Tetranychus Urticae ◽  
Arachis Hypogaea ◽  
Wild Species ◽  
Spider Mite ◽  
Twospotted Spider Mite ◽  
Plant Introductions ◽  
Study Section ◽  
Arachis Hypogaea L ◽  
Tetranychus Urticae Koch ◽  
Twospotted Spider

Abstract Wild species of Arachis representing all seven sections of the genus were screened in the greenhouse for resistance to the twospotted spider mite, Tetranychus urticae Koch. Most species of the section RHIZOMATOSAE were found to be highly resistant to the mite. Plant introductions 338296, 338317, 262840, 262827 and several other members of the section RHIZOMATOSAE were virtually mite free throughout the tests. PI 276203 from section EXTRANERVOSAE, PI 262142 from section ERECTOIDES and PI 331194 from section ARACHIS also had relatively low damage ratings in this study. Section Arachis is the only section with resistance to the mite that will cross readily with cultivated peanuts, Arachis hypogaea L. Thus the utilization of germplasm resistant to the mite from the wild species will require complicated and difficult breeding procedures.

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