Cytology of Rosellinia mammiformis and R. aquila

1974 ◽  
Vol 52 (1) ◽  
pp. 5-10 ◽  
Author(s):  
Jack D. Rogers ◽  
D. L. Stiers
Keyword(s):  
Chromosome Number ◽  
Spore Body

The chromosome number of Rosellinia mammiformis is n = 6. Ascospores are uninucleate when formed, becoming binucleate by mitosis. One of the nuclei degenerates; maturing ascospores are uninucleate. Ascospores show apical appendages that are proliferations of the outermost wall or perispore. The chromosome number of Rosellinia aquila is tentatively n = 6. Ascospores are at first uninucleate, becoming binucleate by a mitosis. One of the nuclei degenerates and is often cut off in an appendage. Maturing ascospores are uninucleate and show two types of appendages. Secondary appendages are formed from the perispore. Primary appendages are cut off from the spore body by a septum and are surrounded by the secondary appendage. In addition, a double primary appendage, part of which probably functions to trap a degenerating nucleus, is described. The significance of these results is discussed.

IOPB CHROMOSOME NUMBER REPORTS LVIII

Taxon ◽  
1977 ◽  
Vol 26 (5-6) ◽  
pp. 557-565 ◽  
Author(s):  
Áskell Löve
Keyword(s):  
Chromosome Number

IOPB CHROMOSOME NUMBER REPORTS XXV

Taxon ◽  
1970 ◽  
Vol 19 (1) ◽  
pp. 102-113 ◽  
Author(s):  
Áskell Löve
Keyword(s):  
Chromosome Number

IOPB CHROMOSOME NUMBER REPORTS LVI

Taxon ◽  
1977 ◽  
Vol 26 (2-3) ◽  
pp. 257-274 ◽  
Author(s):  
Áskell Löve
Keyword(s):  
Chromosome Number

Distribution and chromosome number of Sonchus palustris in Slovakia

2020 ◽  
Vol 62 (1-2) ◽  
pp. 7-21
Author(s):  
M. Dudáš ◽  
P. Eliáš jun. ◽  
D. R. Letz ◽  
Z. Bártová ◽  
V. Kolarčik
Keyword(s):  
Chromosome Number ◽  
Red List ◽  
Herbarium Specimens ◽  
Distribution Map ◽  
Literary Sources ◽  
Different Types ◽  
New Localities ◽  
Recent Version

The distribution of Sonchus palustris in Slovakia was studied using herbarium specimens and literary sources. The herbarium studies, supplemented with targeted field search in the years 2015–2018, revealed 61 new localities and confirmed many other older locations. The species has been recorded in 19 phytogeographical districts and sub-districts of Slovakia. Most of the records are concentrated in the Podunajská nížina lowland in SW Slovakia and in the Ipel'sko-rimavská brázda region in southern Slovakia. Our results showed that the species is relatively common in different types of wetlands and its re-evaluation in the recent version of the Slovak red list is not needed. Chromosome number data for two new populations in eastern Slovakia (both 2n = 18) were counted. The distribution map is given.

CHROMOSOME NUMBER DETERMINATIONS IN FAMILY COMPOSITAE, TRIBE ASTEREAE. IX. NORTH AMERICAN TAXA. II

Rhodora ◽  
10.3119/18-07 ◽  
2019 ◽  
Vol 121 (985) ◽  
pp. 37 ◽  
Author(s):  
John C. Semple ◽  
Rachel E. Cook ◽  
Gary H. Morton ◽  
James B. Beck ◽  
Rita Lopez Laphitz
Keyword(s):  
Chromosome Number ◽  
North American

Cytology and Breeding of Hexaploid Alfalfa. I. Stability of Chromosome Number 1

Crop Science ◽  
1979 ◽  
Vol 19 (3) ◽  
pp. 389-393 ◽  
Author(s):  
Sheng‐Tian Yen ◽  
R. P. Murphy
Keyword(s):  
Chromosome Number

CHROMOSOME NUMBER REPORTS XCVIII

Taxon ◽  
1988 ◽  
Vol 37 (1) ◽  
pp. 194-196
Author(s):  
Áskell Löve
Keyword(s):  
Chromosome Number

scholarly journals The Origin of Workerless Parasites inLeptothorax(S. Str.) (Hymenoptera: Formicidae)

1995 ◽  
Vol 102 (3-4) ◽  
pp. 195-214 ◽  
Author(s):  
Jürgen Heinze
Keyword(s):  
Chromosome Number ◽  
Evolutionary Origin ◽  
Social Parasites ◽  
Leptothorax Acervorum ◽  
Using Data

The evolutionary origin of workerless parasitic ants parasitizing colonies ofLeptothorax(s.str.) is investigated using data on morphology, chromosome number, and allozyme phenotype of both social parasites and their hosts. Of the three previously proposed pathways, the evolution of workerless parasites from guest ants or slave-makers is unlikely, at least according to a phenogram obtained by UPGMA clustering of Nei's similarities based on seven enzymes, lntraspecific evolution of the workerless parasitesDoronomyrmex goesswaldi, D. kutteri, andD. pacisfrom their common host,Leptothorax acervorumcannot be excluded with the present data. The workerless parasiteL. paraxenus, however, clearly differs from its host,L.cf.canadensis, in morphology and biochemistry, and most probably did not evolve from the latter species. It is proposed to synonymizeDoronomyrmexunderLeptothorax(s.str.).

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