CYTOGENETIC STUDIES IN THE GENUS HORDEUM. III. PAIRING IN SOME INTERSPECIFIC AND INTERGENERIC HYBRIDS

1959 ◽  
Vol 1 (1) ◽  
pp. 65-77 ◽  
Author(s):  
J. W. Morrison ◽  
T. Rajhathy
Keyword(s):  
Intergeneric Hybrids ◽  
Cytogenetic Studies

CYTOGENETIC STUDIES OF INTERGENERIC HYBRIDS INVOLVING AEGILOPS VENTRICOSA AND SPECIES OF TRITICUM

1967 ◽  
Vol 9 (4) ◽  
pp. 776-784 ◽  
Author(s):  
K. A. Siddiqui ◽  
J. K. Jones
Keyword(s):  
Intergeneric Hybrids ◽  
Aegilops Ventricosa ◽  
Cytogenetic Studies

Cytogenetic studies of progeny from the intergeneric crosses Elymus × Hordeun and Elymus × Secale

Genome ◽  
1990 ◽  
Vol 33 (3) ◽  
pp. 425-432 ◽  
Author(s):  
Bao-Rong Lu ◽  
Björn Salomon ◽  
Roland von Bothmer
Keyword(s):  
Intergeneric Hybrid ◽  
Chromosome Elimination ◽  
Intergeneric Hybrids ◽  
Meiotic Pairing ◽  
Homoeologous Chromosome ◽  
Intergeneric Crosses ◽  
Homoeologous Chromosome Pairing ◽  
Cytogenetic Studies ◽  
Elymus Species ◽  
Hordeum Vulgare Ssp

Meiotic pairing was studied in three Elymus species, E. pseudonutans (2n = 28), E. shandongensis (2n = 28), and E. semicostatus (2n = 28), as well as their dihaploids (2n = 14) which were produced from the intergeneric crosses E. pseudonutants × Hordeum vulgare ssp. spontaneum, E. shandongensis × Triticum aestivum, and E. semicostatus × H. bulbosum. An average of 12.82 I + 0.55 II + 0.03 III; 12.59 I + 0.65 II + 0.01 III, and 12.70 I + 0.76 II + 0.02 III per cell characterized meioses in the dihaploids, respectively. Intergeneric hybrids (2n = 21) of the three species were also obtained with diploid Secale cereal and S. montanum. Meiotic configurations of the hybrids were 14.64 I + 2.82 II + 0.20 III + 0.01 IV and 16.38 I + 2.02 II + 0.16 III for two combinations of E. pseudonutans × S. cereale; 15.59 I + 2.62 II + 0.08 III and 19.63 I + 0.65 II for E. shandongensis × S. cereale and E. semicostatus × S. montanum, respectively. A large number of chromosomes were involved in secondary associations in the different combinations. The study revealed (i) low affinity between S and Y genomes in the investigated Elymus species, (ii) a certain degree of homoeology between genomes of Elymus (S or Y) and rye (R), and (iii) that the rye genome affects homoeologous chromosome pairing between different genomes in the Elymus species.Key words: Elymus, Hordeum, Secale, dihaploid, chromosome elimination, intergeneric hybrid, meiotic pairing.

scholarly journals CYTOGENETIC STUDIES ON TRITICALE. I. A METHOD FOR DETERMINING THE EFFECTS OF INDIVIDUAL SECALE CHROMOSOMES ON TRITICUM

Genetics ◽  
1940 ◽  
Vol 25 (4) ◽  
pp. 401-408
Author(s):  
J G O'mara
Keyword(s):  
Cytogenetic Studies

Cytogenetic studies in triploid hybrids ofAquilegia

1945 ◽  
Vol 47 (1) ◽  
pp. 87-111 ◽  
Author(s):  
M. Skalińska
Keyword(s):  
Cytogenetic Studies

scholarly journals Chromosomal painting of the sandpiper (Actitis macularius) detects several fissions for the Scolopacidae family (Charadriiformes)

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Melquizedec Luiz Silva Pinheiro ◽  
Cleusa Yoshiko Nagamachi ◽  
Talita Fernanda Augusto Ribas ◽  
Cristovam Guerreiro Diniz ◽  
Patricia Caroline Mary O´Brien ◽  
...  
Keyword(s):  
Chromosome Painting ◽  
Diploid Number ◽  
Chromosomal Evolution ◽  
Long Distance ◽  
Chromosomal Painting ◽  
Cytogenetic Studies ◽  
Burhinus Oedicnemus ◽  
Clear Idea ◽  
First Time

Abstract Background The Scolopacidae family (Suborder Scolopaci, Charadriiformes) is composed of sandpipers and snipes; these birds are long-distance migrants that show great diversity in their behavior and habitat use. Cytogenetic studies in the Scolopacidae family show the highest diploid numbers for order Charadriiformes. This work analyzes for the first time the karyotype of Actitis macularius by classic cytogenetics and chromosome painting. Results The species has a diploid number of 92, composed mostly of telocentric pairs. This high 2n is greater than the proposed 80 for the avian ancestral putative karyotype (a common feature among Scolopaci), suggesting that fission rearrangements have formed smaller macrochromosomes and microchromosomes. Fluorescence in situ hybridization using Burhinus oedicnemus whole chromosome probes confirmed the fissions in pairs 1, 2, 3, 4 and 6 of macrochromosomes. Conclusion Comparative analysis with other species of Charadriiformes studied by chromosome painting together with the molecular phylogenies for the order allowed us to raise hypotheses about the chromosomal evolution in suborder Scolopaci. From this, we can establish a clear idea of how chromosomal evolution occurred in this suborder.

The dose-effect problem in cytogenetic studies in vitro in chemotherapuetically treated probands

1975 ◽  
Vol 29 (2) ◽  
pp. 282
Author(s):  
E. Gebhart ◽  
G. Schwanitz ◽  
G. Hartwich
Keyword(s):  
Dose Effect ◽  
Cytogenetic Studies

scholarly journals Cytogenetic Studies in Melandrium album I

CYTOLOGIA ◽  
1942 ◽  
Vol 12 (2-3) ◽  
pp. 347-355
Author(s):  
Kono Yasui
Keyword(s):  
Cytogenetic Studies ◽  
Melandrium Album
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