Morphological Variation in Solanum x Edinense, A Hybrid of The Common Potato

Evolution ◽  
1967 ◽  
Vol 21 (4) ◽  
pp. 696 ◽  
Author(s):  
Donald Ugent
Keyword(s):  
Morphological Variation ◽  
Common Potato ◽  
The Common

MORPHOLOGICAL VARIATION IN SOLANUM X EDINENSE , A HYBRID OF THE COMMON POTATO

Evolution ◽  
1967 ◽  
Vol 21 (4) ◽  
pp. 696-712 ◽  
Author(s):  
Donald Ugent
Keyword(s):  
Morphological Variation ◽  
Common Potato ◽  
The Common

scholarly journals The Effect of Environmental Factors on the Morphological Variation of the Common Pheasant, Phasianus colchicus in China

2020 ◽  
Author(s):  
Fangqing Liu ◽  
Jared Atlas ◽  
Chaohao Du ◽  
Anoop Das ◽  
Longying Wen
Keyword(s):  
Environmental Factors ◽  
Morphological Variation ◽  
Phasianus Colchicus ◽  
Common Pheasant ◽  
The Common

Morphological variation in genetically divergent populations of the common whelk, Buccinum undatum (Gastropoda: Buccinidae), across the North Atlantic

2019 ◽  
Vol 128 (1) ◽  
pp. 93-106 ◽  
Author(s):  
Hildur Magnúsdóttir ◽  
Snæbjörn Pálsson ◽  
Kristen Marie Westfall ◽  
Zophonías O Jónsson ◽  
Erla Björk Örnólfsdóttir
Keyword(s):  
North Atlantic ◽  
Morphological Variation ◽  
Isolation By Distance ◽  
Shell Morphology ◽  
Buccinum Undatum ◽  
The North ◽  
The Common ◽  
The North Atlantic ◽  
Eastern North Atlantic ◽  
The Impact

Abstract The variation in shelled marine gastropod morphology across small spatial scales can reflect restricted population connectivity, resulting in evolution or plastic responses to environmental heterogeneity. The common whelk, Buccinum undatum, is a subtidal gastropod, ubiquitous in the North Atlantic, that exhibits considerable spatial variation in shell morphology and colour. Given that species delimitation in shelled marine gastropods is often based on shell characteristics, such morphological variation can lead to taxonomic confusion. Phylogeographical analysis based on mitochondrial DNA and microsatellites suggested cryptic species composed of Western and Eastern North Atlantic common whelk populations, the separation of which dates to the onset of the Pleistocene glaciation ~2.1 Mya. Divergence within the Eastern North Atlantic is more recent and characterized by isolation by distance. In the present study, phenotypic variation in shell morphology across the North Atlantic range is analysed and compared with molecular divergence. The morphological variation of B. undatum populations reflected the pattern observed for the molecular markers only for certain comparisons of populations and might, in other cases, reflect larger constraints on the morphological variation and, possibly, the impact of environmental influences.

Triploids of the common potato,Solanum tuberosum L.

1976 ◽  
Vol 19 (4) ◽  
pp. 377-380 ◽  
Author(s):  
N. Van Suchtelen
Keyword(s):  
Solanum Tuberosum ◽  
Solanum Tuberosum L ◽  
Common Potato ◽  
The Common

2n gametes in Solanum commersonii and cytological mechanisms of triplandroid formation in triploid hybrids of Solanum commersonii × Solanum gourlayi

Genome ◽  
1992 ◽  
Vol 35 (5) ◽  
pp. 864-869 ◽  
Author(s):  
R. W. Masuelli ◽  
E. L. Camadro ◽  
A. O. Mendiburu
Keyword(s):  
2N Gametes ◽  
Pollen Grains ◽  
Solanum Commersonii ◽  
Stainable Pollen ◽  
Large Size ◽  
Common Potato ◽  
Aneuploid Chromosome ◽  
The Common ◽  
Bridge Species ◽  
Solanum Gourlayi

Solanum commersonii Dun. (cmm) is a diploid wild species of potential value for potato breeding. Ploidy level manipulations are necessary to cross this species with the common potato. This could be achieved by the use of "bridge" species and sexual polyploidization in which 2n gametes are involved. Eight introductions of cmm were screened for production of (i) diplandroids, through cytological observations confirmed by controlled 4x Solanum acaule Bitt. (acl) × 2x cmm crosses, and (ii) diplogynoids, by controlled 2x cmm × 2x Solanum gourlayi Haw. (grl) crosses. Eleven plants produced 1–3% large size pollen and one plant produced more than 3% of this type of pollen. Twelve triploid and seven tetraploid hybrids were obtained when these plants were used in crosses with acl. On the other hand, 75 triploid hybrids were obtained from the second type of cross. The average pollen stainability in the diplogynoid triploid cmm × grl hybrids was 18.9%, with a range of 2–34.4%. Forty-four to 54.6% of meiocytes with parallel spindles in metaphase II and anaphase II were observed in microsporogenesis of these hybrids. For each clone, the frequency of triplandroids predicted according to the frequency of meiocytes with parallel, fused and tripolar spindles in anaphase II were 52.3, 36.6, and 45.2%, respectively. These values were highly superior to the frequency of triplandroids predicted according to the number of dyads and triads observed, 8.8, 0.7, and 3.9%, respectively. However, triplandroid frequencies predicted according to the frequencies of fused and tripolar spindles agree with the triplandroid frequencies observed. The frequencies of stainable pollen grains are not completely accounted for by the formation of fused and tripolar spindles. In view of the variability encountered in size, it is assumed that a high proportion of gametophytes with aneuploid chromosome numbers are also stainable. A hypothesis is put forward regarding the possible genetic control of triplandroid formation in the diplogynous triploid hybrids analyzed.Key words: 2n gametes, triploid hybrids, spindle orientation, Solanum commersonii Dun.

Morphological variation in the Common Fiscal Lanius collaris along an altitudinal gradient in southern Africa

Ostrich ◽  
2005 ◽  
Vol 76 (3-4) ◽  
pp. 130-141 ◽  
Author(s):  
S Soobramoney ◽  
CT Downs ◽  
NJ Adams
Keyword(s):  
Southern Africa ◽  
Morphological Variation ◽  
Altitudinal Gradient ◽  
The Common

The longevity of seeds of the common potato,Solanum tuberosum

1980 ◽  
Vol 57 (12) ◽  
pp. 601-607 ◽  
Author(s):  
W. G. Barker ◽  
G. R. Johnston
Keyword(s):  
Solanum Tuberosum ◽  
Common Potato ◽  
The Common

scholarly journals GENETIC ANALYSIS OF ISOZYME LOCI IN TETRAPLOID POTATOES (SOLANUM TUBEROSUM L.)

Genetics ◽  
1984 ◽  
Vol 108 (3) ◽  
pp. 669-679
Author(s):  
J M Martinez-Zapater ◽  
Jose L Oliver
Keyword(s):  
Solanum Tuberosum ◽  
Genetic Control ◽  
Solanum Tuberosum L ◽  
Duplicate Gene ◽  
Starch Gel Electrophoresis ◽  
Tetrasomic Inheritance ◽  
Isozyme Loci ◽  
Starch Gel ◽  
Common Potato ◽  
The Common

ABSTRACT The genetic control of eight isozyme loci revealed by starch gel electrophoresis was studied through the analysis of three progenies derived from four tetraploid cultivars of Solanum tuberosum (groups Andigena and Tuberosum). Duplicate gene expression was found in seven (Got-A, Got-B, Pgd-C, Pgi-B, Pgm-A, Pgm-B and Pox-C) isozyme loci. In another isozyme gene (Adh-A), the parental genotypes were not adequate to distinguish between a monogenic or a digenic model of genetic control. Tetrasomic inheritance was demonstrated in four (Got-A, Got-B, Pgd-C and Pgi-B) isozyme loci. In the remaining duplicate genes, the parental genotypes precluded discrimination between disomic or tetrasomic models. Tetrasomic segregations of the chromosomal type were generally found; however, the isozyme phenotypes shown by three descendants from selfing cv. Katahdin indicate the occurrence of chromatid segregations, although aneuploidy cannot be ruled out. Either autoploidy or amphidiploidy with lack of chromosome differentiation between the two diploid ancestors can account for the existence of tetrasomic inheritance in the common potato.

The production of aneudihaploids in Solanum tuberosum L. group Tuberosum (the common potato)

Euphytica ◽  
1975 ◽  
Vol 24 (3) ◽  
pp. 731-741 ◽  
Author(s):  
M. Wagenvoort ◽  
W. Lange
Keyword(s):  
Solanum Tuberosum ◽  
Solanum Tuberosum L ◽  
Common Potato ◽  
The Common ◽  
Group Tuberosum
Sign in / Sign up

Export Citation Format

Share Document