CYTOGENETIC STUDIES OF TRANSEC — A WHEAT-RYE TRANSLOCATION LINE

1967 ◽  
Vol 9 (2) ◽  
pp. 375-380 ◽  
Author(s):  
C. J. Driscoll ◽  
L. M. Anderson
Keyword(s):  
Translocation Line ◽  
Cytogenetic Studies

Identification of a Triticum–Lophopyrum noncompensating translocation line and detection of Lophopyrum DNA using a wheatgrass specific molecular probe

Genome ◽  
1992 ◽  
Vol 35 (4) ◽  
pp. 541-544 ◽  
Author(s):  
Nam-Soo Kim ◽  
Ernest D. P. Whelan ◽  
George Fedak ◽  
Ken Armstrong
Keyword(s):  
Repetitive Dna ◽  
Southern Hybridization ◽  
Molecular Probe ◽  
Translocation Line ◽  
Chromosome 6 ◽  
Wheat Curl Mite ◽  
Chromosome 5B ◽  
Cytogenetic Studies ◽  
Group 5 ◽  
Lophopyrum Ponticum

A Triticum–Lophopyrum translocation line was produced by a series of backcrosses between F1 hybrids derived from the cross Triticum aestivum × Lophopyrum ponticum (Podp.) Love and their progenies and bread wheat. Cytogenetic studies of progeny of crosses between the wheat-alien translocation line and doubled ditelosomics of the group 5 homoeologues of 'Chinese Spring' indicated that the translocated chromosome consisted of the long arm of chromosome 5B of wheat and short (S) arm of chromosome 6 (6AgS) of decaploid L. ponticum (2n = 70), which carries the gene(s) for resistance to colonization by wheat curl mite (Eriophyes tulipae Keifer). The frequencies of resistance to mite colonization were similar (p = 0.64) for F1 progenies from crosses between the noncompensating translocation line and double ditelosomics for 5A, 5B, and 5D and averaged 61.4%, but the frequency of F2 seeds per head (11.8) was lowest (p > 0.05) for hybrids involving 5B double ditelosomics. A repetitive DNA probe found abundantly in wheatgrass was also used to detect the Lophopyrum chromatin in this wheat-alien translocation plant. Although this probe hybridized faintly to wheat DNA in Southern hybridization, the probe's diagnostic hybridization to DNA from the wheat-Lophopyrum translocation plant clearly showed the presence of Lophopyrum DNA.Key words: wheat, Lophopyrum, wheatgrass, Eriophyes tulipae, translocation, hybrids, repetitive DNA sequence.

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.

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

Cytogenetic Studies of Two Species of Porpoise

Nature ◽  
1967 ◽  
Vol 213 (5072) ◽  
pp. 189-190 ◽  
Author(s):  
DEBORAH A. DUFFIELD ◽  
SAM H. RIDGWAY ◽  
ROBERT S. SPARKES
Keyword(s):  
Cytogenetic Studies

INVESTIGATIONS ON RUBBER-BEARING PLANTS: IV. CYTOGENETIC STUDIES IN ASCLEPIAS (TOURN.) L.

1946 ◽  
Vol 24c (3) ◽  
pp. 66-73 ◽  
Author(s):  
Raymond J. Moore
Keyword(s):  
Chromosome Number ◽  
Natural Hybrids ◽  
Rubber Bearing ◽  
Cytogenetic Studies

The chromosome number of eight species and varieties of Asclepias (A. syriaca, A. incarnata and variety pulchra and forma albiflora, A. Sullivantii, A. tuberosa, A. curassavica, A. speciosa) was found to be 2n = 22.Various interspecific pollinations were attempted without success. A cross of A. incarnata with forma albiflora was successful.Possible natural hybrids between A. syriaca and A. speciosa and between A. incarnata and var. pulchra and forma albiflora are described. Two unusual chimaeral plants of A. incarnata that produced several stems of forma albiflora are described.

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