Genetic regulation of chromocentres in radish, Raphanus sativus L.

Dayal, Narsinha; Prasad, Ch. Raghava

doi:10.1508/cytologia.48.245

Cited by 7 publications

(4 citation statements)

References 7 publications

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“…The reduction in the number of centromeres in all the species might be due to overlapping of chromocenters indicating the somatic association of chromosomes. However, the number of chromocenters is considered to be controlled genetically and is therefore a species-specific character (Dayal 1975, Dayal andPrasad 1983).…”

Section: Discussionmentioning

confidence: 99%

Nuclear Phenotype and Heterochromatin Percentages in Somatic Cells on Five Species of Crotalaria L.

Sarkar,

Rahman,

Karim

et al. 2023

J bio-sci.

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Crotalaria L. is a genus of flowering plants in the family Fabaceae (subfamily Faboideae). Mitotic index is proportionately relevant to cell division rate; mitotic index was found higher (10.38±1.08%) in C. spectabilis and lower (9.43±0.304%) in C. juncea. The nuclear organizations were observed chromocentric in all examined species. The interphase chromosome volume was highest in C. juncea (0.596±0.27 µ³ in meristematic cell and 0.408±0.21 µ³ in differentiated cell) and lowest in C. saltiana (0.205±0.31 µ³ in meristematic cell and 0.16±0.25 µ³ in differentiated cell) which do not correlated with the somatic chromosome number but may be related with environmental condition. The largest cell size was found in C. juncea (20.47±0.49 µm2 in meristematic cell and 106.47±0.63 µm2 in differentiated cell) and the smallest in C. saltiana (14.43±0.39 µm2 in meristematic cell and 45.86±0.21 µm2 in differentiated cell). It was also observed that, the mean value of cell size was larger in differentiated cell compared to meristematic cell in all the studied species of Crotalaria. Chromocenter numbers were found highest (13.66±0.14) in C. saltiana and lowest (9.50±0.32) in C. juncea which are considered as more primitive and more advance in nature, respectively. Percentages of heterochromatin per nuclear area were found highest (14.75±0.71) in C. saltiana and lowest (9.67±0.71) in C. juncea which are considered as more primitive and more advance in nature, respectively. J. Bio-Sci. 30(2): 79-88, 2022

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Section: Discussionmentioning

confidence: 99%

Nuclear Phenotype and Heterochromatin Percentages in Somatic Cells on Five Species of Crotalaria L.

Sarkar,

Rahman,

Karim

et al. 2023

J bio-sci.

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“…The reduction in number of chromocenters might be due to fusion or overlapping of chromocenters indicating the somatic association of chromosomes (Kabir and Singh 1989). Dayal and Prasad (1983) stated that the number of chromocenters is considered to be controlled genetically and is, therefore a species specific character.…”

Section: Discussionmentioning

confidence: 99%

Interphase nuclear phenotype and chromosomal variation in Cynodon dactylon (L.) pers

2019

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Interphase nuclear phenotype in different accessions (Acc.) of Cynodon dactylon studied in the present experiment showed chromocentric nuclear organization and the chromocenters were found to be visible clearly. The chromocenter numbers were not same and sometimes it was found to be significantly less and never more than total number of chromosomes. Percentages of heterochromatin values were expressed per nuclear area and the values range from 19.759% (Acc. 16) to 66.022% (Acc.18). Nuclear volume as well as interphase chromosome volume was found to vary 0.674 μm3 (Acc.6) to 41.921 μm3 (Acc.10) and from 0.028 μm3 (Acc. 6) to 1.905 μm3 (Acc. 10), respectively. The somatic chromosome number found to vary from 12 to 40. 2n = 18 chromosomes were found in eight accessions of C. dactylon. Only one accession was found to be tetraploid and rest of them aneuploid whose chromosome numbers were 12, 14, 16, 22, 24, 26, 32, 40 etc. The availability of aneuploid shows great aspects of forage breeding programme. J. bio-sci. 27: 133-141, 2019

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“…The number of chromocentres in the nuclei of F, was found to be somewhat closer to the male parent than that of the female parent. The number of chromocentres is considered to be controlled genetically and is, therefore, a species specific character (Dayal and Prasad 1983).…”

Section: Methodsmentioning

confidence: 99%

Interphase Nuclear Structure and Heterochromatin in Two Species of Corchorus and Their F1 Hybrid.

1992

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Genetic regulation of chromocentres in radish, Raphanus sativus L.

Cited by 7 publications

References 7 publications

Nuclear Phenotype and Heterochromatin Percentages in Somatic Cells on Five Species of Crotalaria L.

Nuclear Phenotype and Heterochromatin Percentages in Somatic Cells on Five Species of Crotalaria L.

Interphase nuclear phenotype and chromosomal variation in Cynodon dactylon (L.) pers

Interphase Nuclear Structure and Heterochromatin in Two Species of Corchorus and Their F1 Hybrid.

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