Observations on Canadian birches, Betula cordifolia, B. neoalaskana, B. populifolia, B. papyrifera, and B. × caerulea

1975 ◽  
Vol 53 (15) ◽  
pp. 1478-1490 ◽  
Author(s):  
W. F. Grant ◽  
B. K. Thompson
Keyword(s):  
New Brunswick ◽  
Growth Rates ◽  
Chromosome Numbers ◽  
Somatic Chromosome ◽  
Morphological Characters ◽  
The Other ◽  
Canonical Analysis ◽  
Early Age ◽  
Somatic Chromosome Numbers

Ten morphological characters have been examined from 455 collections of B. papyrifera Marsh., 95 collections of B. cordifolia Regel, 56 collections of B. populifolia Marsh., 64 collections of B. neoalaskana Sarg., and 70 collections of B. × caerulea Blanch. taken from their ranges within Canada. The somatic chromosome numbers were found to be 70, 84, and more rarely 56 (possibly hybrids) for B. papyrifera, 28 and more rarely 42 and 56 for B. cordifolia, and 28 for B. populifolia, B. neoalaskana, and B. × caerulea. Observations on juvenile characters and growth rates indicated that it is possible to distinguish these taxa at an early age. Comparison of the characters on an interprovincial basis within species revealed no significant differences in B. populifolia (P < .05). However, significant differences were observed in one or more characters from the other species. No significant differences were found between species when B. papyrifera was either sympatric or allopatric with B. cordifolia and B. populifolia; when B. cordifolia was sympatric but B. populifolia was not; and when B. populifolia was sympatric but B. cordifolia was not. A canonical analysis of the New Brunswick data incorporating the 10 characters indicated clear distinctions among B. papyrifera, B. cordifolia, and B. populifolia and provided further evidence that B. × caerulea is a hybrid of B. populifolia and B. cordifolia. Considerable introgression of B. caerulea with B. populifolia was noted in these data.

CHROMOSOME NUMBERS AND TAXONOMIC NOTES ON NORTHERN GRASSES: II. TRIBE FESTUCEAE

1960 ◽  
Vol 38 (2) ◽  
pp. 117-131 ◽  
Author(s):  
Wray M. Bowden
Keyword(s):  
Chromosome Numbers ◽  
Somatic Chromosome ◽  
Bromus Tectorum ◽  
Dactylis Glomerata ◽  
Bromus Inermis ◽  
Festuca Rubra ◽  
Lolium Rigidum ◽  
Voucher Specimens ◽  
Dactylis Glomerata L ◽  
Somatic Chromosome Numbers

Chromosome numbers and voucher specimens are recorded for some collections of the tribe FESTUCEAE Dumort., mainly collected in Canada. The somatic chromosome numbers of the following are recorded: (1a) Arctagrostis arundinacea (Trin.) Beal var. arundinacea, 2n = 28, 2n = 29, and 2n = 30; (1b) Arctagrostis arundinacea (Trin.) Beal var. crassispica Bowden, 2n = 56; (1c) Arctagrostis latifolia (R.Br.) Griseb., 2n = 56. (2) Beckmannia syzigachne (Steud.) Fern., 2n = 14. (3) Brachyelytrum erectum (Schreb.) Beauv., two vars., 2n = 22. (4a) Bromus ciliatus L., 2n = 14; (4b) Bromus inermis Leyss., two subspecies and two vars., 2n = 56; (4e) Bromus kalmii A. Gray, 2n = 14; (4d) Bromus porteri (Coult.) Nash, 2n = 14; (4c) Bromus tectorum L., 2n = 14. (5) Catabrosa aquatica (L.) Beauv. var. laurentiana Fern., 2n = 20. (6) Dactylis glomerata L., 2n = 28. (7) Distichlisstricta (Torr.) Rydb., 2n = 40. (8a) Dupontiafisheri R.Br, subsp. fisheri, 2n = 132; (8b) Dupontia fisheri R.Br, subsp. psilosantha (Rupr.) Hultén, 2n = 44. (9) Eremopoa persica (Trin.) Roshev., 2n = 28. (10a) Festuca altaica Trin., 2n = 28; (10b) Festuca baffinensis Polunin, 2n = 28; (10c) Festuca brachyphylla Schultes, 2n = 42 and one collection, 2n = 44; (10d) Festuca elatior L., 2n = 14; (10e) Festuca obtusa Bieler, 2n = 42; (10f) Festuca prolifera (Piper) Fern. var. lasiolepis Fern., 2n = 50; (10g) Festuca rubra L., 2n = 42; (10h) Festuca saximontana Rydb., 2n = 42; (10i)Festuca scabrella Torr. ex Hook., two vars., 2n = 56 and 2n = 28. (11a) Glyceria borealis (Nash) Batchelder, 2n = 20; (11b) Glyceria canadensis (Michx.) Trin., 2n = 60; (11c) Glyceria grandis S. Wats., 2n = 20; (11d) Glyceria melicaria (Michx.) Hubb., 2n = 40; (11e) Glyceria pulchella (Nash) K. Schum., 2n = 20; (11f) Glyceria striata (Lam.) Hitchc, 2n = 20; (11g) Glyceria × gatineauensis Bowden (G. melicaria × G. striata), 2n = 30; (11h)Glyceria × ottawensis Bowden (G. canadensis × G. striata), three nothomorphs, 2n = 42, 2n = 46, and 2n = 48. (12) Lolium rigidum Gaud., 2n = 14. (13a) Phippsiaalgida (Sol.) R.Br., 2n = 28; (13b) Phippsia concinna (Th. Fries) Lindeb., 2n = 28. (14) Pleuropogon sabinei R.Br., 2n = 42. (15) Schizachnepurpurascens (Torr.) Swallen, 2n = 20. (16) Torreyochloa fernaldii (Hitchc.) Church, 2n = 14.

scholarly journals Badania kariologiczne nad dwoma gatunkami rodzaju Sparganium L. [Karyological studies in two species of the genus Sparganium]

2015 ◽  
Vol 40 (1) ◽  
pp. 143-148
Author(s):  
K. Bijok ◽  
E. Adamkiewicz
Keyword(s):  
Chromosome Numbers ◽  
Somatic Chromosome ◽  
Somatic Chromosome Numbers

The somatic chromosome numbers 2n = 30 for <em>Sparganium neglectum</em> and <em>S. minimum</em> was established. The karyotype of the first species consist of 8 iso- and 7 heterobronchial chromosomes and the reverse is true for the second species. In metabolic nuclei 30 chromocentres are visible.

SOMATIC CHROMOSOME NUMBERS IN CERTAIN TRIFOLIUM SPECIES

1972 ◽  
Vol 14 (1) ◽  
pp. 139-145 ◽  
Author(s):  
M. K. Anderson ◽  
N. L. Taylor ◽  
G. B. Collins
Keyword(s):  
Chromosome Numbers ◽  
Somatic Chromosome ◽  
Karyotype Analyses ◽  
Somatic Chromosome Numbers

In the present study chromosome numbers of 13 Trifolium species were determined, making a total of 155 species for which chromosome numbers have been reported. Four species which have been reported only once were confirmed. Eleven of the 17 species observed have 16 chromosomes (n = 8). T. bocconei Savi was found to have 12 chromosomes (n = 6) and T. desvauxii Boess. and Bl. was found to have 10 chromosomes (n = 5). Karyotype analyses of T. bocconei and T. desvauxii revealed that the chromosomes of each species could be differentiated on the basis of arm ratios and chromosome lengths.

SOMATIC CHROMOSOME NUMBERS OF SOME AFRICAN SAPOTACEAE

1976 ◽  
Vol 25 (6) ◽  
pp. 449-457
Author(s):  
J. C. Arends
Keyword(s):  
Chromosome Numbers ◽  
Somatic Chromosome ◽  
Somatic Chromosome Numbers

CHROMOSOME NUMBERS AND TAXONOMIC NOTES ON NORTHERN GRASSES: IV. TRIBE FESTUCEAE: POA, AND PUCCINELLIA

1961 ◽  
Vol 39 (1) ◽  
pp. 123-138 ◽  
Author(s):  
Wray M. Bowden
Keyword(s):  
Chromosome Numbers ◽  
Somatic Chromosome ◽  
Voucher Specimens ◽  
Somatic Chromosome Numbers

Chromosome numbers and voucher specimens are recorded for some Canadian and Alaskan collections and a few mainland American collections of Poa and Puccinellia which belong to the tribe FESTUCEAE. The somatic chromosome numbers of the following are recorded: (1) Poa agassizensis, 2n = ca. 56; P. alpina, 2n = 32, 33, 39, and 42; P. ampla, 2n = 62; P. annua, 2n = 28; P. arctica, 2n = 56, 63, 70, ca. 75, 78, 82, 85, 86, and 106; P. arida, 2n = ca. 76; P. canbyi, 2n = 56, 70, and ca. 98; P. cusickii, 2n = 56, and 59; P. eminens, 2n = 42; P. fernaldiana, 2n = ca. 42; P. glauca, 2n = 42, 50, 56, 64, 65, 70, 75, and 78; P. glaucantha, 2n = 44; P. glaucifolia, 2n = 56, ca. 70, and ca. 100; P. interior, 2n = 28, 34, 42, and 56; P. juncifolia, 2n = ca. 60; P. leptocoma, 2n = 42; P. nervosa, 2n = 56, and ca. 74; P. palustris, 2n = 28, 30, and 32; P. pratensis, 2n = 28, 42, 44, 56, ca. 66, 67, 70, 74, ca. 78, ca. 82, 84, 86, 88, and ca. 124; P. saltuensis, 2n = 28; P. secunda, 2n = 42, 56, 70, ca. 78, 80. and ca. 90; P. stenantha, 2n = 42; and P. trivialis, 2n = 14.(2) Puccinellia ambigua, 2n = 56; P. americana, 2n = ca. 42 and 56; P. angustata, 2n = 42; P. borealis, 2n = 42; P. bruggemannii, 2n = 28; P. cusickii, 2n = 28; P. distans, 2n = 42; P. glabra, 2n = 42 and 56; P. hauptiana, 2n = 28; P. laurentiana, 2n = 42 and 56; P.longiglumis, 2n = 56; P. lucida, 2n = 42 and 56; P. nuttalliana, 2n = 42; P. × phryganodes, 2n = 21; P. vaginata, 2n = 56; and P. vahliana, 2n = 14.

scholarly journals Somatic Chromosome Numbers of Colchicine-Treated Shinano Walnut (Juglans regia L.) and Its F1 Seedlings

1997 ◽  
Vol 65 (4) ◽  
pp. 677-683 ◽  
Author(s):  
Masao Yajima ◽  
Hisayuki Nakamura ◽  
Kumiko Takahashi ◽  
Yasumitu Watanabe ◽  
Shigemi Saito ◽  
...  
Keyword(s):  
Chromosome Numbers ◽  
Somatic Chromosome ◽  
Juglans Regia ◽  
Somatic Chromosome Numbers

scholarly journals Chromosome numbers in Begonia.3.

1973 ◽  
Vol 21 (2) ◽  
pp. 167-170 ◽  
Author(s):  
R.A.H. Legro ◽  
J. Doorenbos
Keyword(s):  
Chromosome Numbers ◽  
Somatic Chromosome ◽  
Somatic Chromosome Numbers

The somatic chromosome numbers are presented of 34 spp. of African, Asiatic and American origin. Many spp. had not previously been investigated cytologically. [For part 2 see HcA 42, 1737.]. (Abstract retrieved from CAB Abstracts by CABI’s permission)

scholarly journals Diversity and cytological studies of the Genus Amomum Roxb. former Elettariopsis Baker (Zingiberaceae) in Thailand

2021 ◽  
Vol 22 (6) ◽  
Author(s):  
Surapon Saensouk ◽  
Piyaporn Saensouik
Keyword(s):  
Chromosome Numbers ◽  
Somatic Chromosome ◽  
Field Trips ◽  
Root Tips ◽  
Metaphase Chromosomes ◽  
Vernacular Names ◽  
Living Species ◽  
First Time ◽  
Somatic Chromosome Numbers

Abstract. Saensouk P, Saensouk S. 2021. Diversity and cytological studies on the genus Amomum Roxb. former Elettariopsis Baker (Zingiberaceae) in Thailand. Biodiversitas 22: 3209-3218. A comprehensive diversity and cytological studies of the genus Amomum Roxb. in Thailand have not been reported. This work aims to study the diversity and cytological including chromosome numbers and karyotypes of the genus Amomum Roxb. former Elettariopsis Bakerin Thailand. Ten species of Amomum were recognized from Thailand. Nomenclatures, vernacular names, distribution, ecology, and traditional utilization are provided. Only Amomum wandokthong is widely cultivated in all parts in Thailand. Four living species, i.e. Amomum curtisii, A. monophyllum, A. trilobum, and A. wandokthong have been collected from field trips. Therefore, the somatic chromosome numbers from four species of this genus were studied from root tips. The somatic chromosome numbers of each species in this study were counted from 20 cells. The karyotype formulas were derived from measurements of the metaphase chromosomes in photomicrographs. The chromosome numbers of four species were found to be 2n = 48. Karyotypes of four species were reported to be Amomum curtisii (32m + 8sm + 8st), A. monophyllum (26m + 12sm + 10st), A. trilobum (18m + 24sm + 6st), and A. wandokthong (28m + 16sm + 4st with five visible satellites chromosomes). The chromosome numbers of A. monophyllum and A. wandokthong were reported for the first time. The karyotypes of four species were studied for the first time.

scholarly journals Chromosome numbers in. Begonia. 2.

1971 ◽  
Vol 19 (3) ◽  
pp. 176-183 ◽  
Author(s):  
R.A.H. Legro ◽  
J. Doorenbos
Keyword(s):  
Chromosome Numbers ◽  
Somatic Chromosome ◽  
Somatic Chromosome Numbers

The somatic chromosome numbers are presented of 90 Begonia spp. of African, Asian and American origin, including a few of those previously listed [see H.A., 40: 1600] whose nomenclature or chromosome numbers are reconsidered. Sixteen different numbers were found, ranging between 16 and 76. The most common were 28 (26 species), 38 (10 species) and 56 (15 species). [For related work see H.A., 41: 7120.]. (Abstract retrieved from CAB Abstracts by CABI’s permission)

scholarly journals 'n Vergelykende studie van die kariotipes van Tilapia rendalli, Tilapia sparrmanii en Oreochromis mossambicus (Cichlidae)

1992 ◽  
Vol 11 (3) ◽  
pp. 105-109 ◽  
Author(s):  
A. Swanepoel
Keyword(s):  
Chromosome Number ◽  
Chromosome Numbers ◽  
Chromosome Pair ◽  
Somatic Chromosome ◽  
Oreochromis Mossambicus ◽  
Tilapia Rendalli ◽  
Lymphocyte Cultures ◽  
L1 And L2 ◽  
Somatic Chromosome Numbers ◽  
Standard Techniques

Optimal chromosome preparations were obtained from stimulated lymphocyte cultures with a new method based on a combination and modification of several techniques. Tilapia rendalli, T. sparrmanii and Oreochromis mossambicus have somatic chromosome numbers of 44, 42 and 44, respectively. Chromosome pairs L1 and L2 are easily identified in all the karyotypes and distinctive of the tilapias. Tilapia sparrmanii has one additional large metacentric chromosome pair(L3), which occurs concurrently with the reduction of two in the total chromosome number. The F chromosomes were divided into two groups, viz a submetacentric (sm) and a telocentric (t) group. T. rendalli has 8 sm chromosomes, while both T. sparrmanii and O. mossambicus have 6 chromosomes in the sm group. The rest of the F chromosomes were telocentric. The identification of the sex chromosomes in the karyotypes of tilapia has thus far not been possible using standard techniques.

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