Abstract
In one of the plants of the inbred line IP 1475 of Pennisetum americanum (L.) Leeke, spontaneous chromosome breakage was observed. Distribution of the breaks was non-random and was confined to the centromeres and to the chromosome ends. Breakage in the centric region was twice as frequent as that in the end segments. Further, nucleolar chromosomes were involved less frequently than others in breakage and stickiness. Other meiotic abnormalities like asynapsis, exaggeration and stretching of the centromere, chromosome stickiness and neocentric activity were also observed in the same plant. All these abnormalities were interpreted to be the features of breakdown of the genetic system resulting from the enforced inbreeding of the normally cross pollinated species.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 29-35 |
| Number of pages | 7 |
| Journal | Proceedings of the Indian Academy of Sciences - Section B |
| Volume | 87 |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 1978 |
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Keywords
- americanum
- Asynapsis
- in-breeding depression
- non-random breakage
- Pennisetum
ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology(all)
- Agricultural and Biological Sciences(all)
Cite this
Asynapsis and spontaneous centromeric breakage in an inbred line of Pennisetum americanum (L.) Leeke. / Rao, M. Krishna; Koduru, Prasad R K.
In: Proceedings of the Indian Academy of Sciences - Section B, Vol. 87, No. 2, 02.1978, p. 29-35.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Asynapsis and spontaneous centromeric breakage in an inbred line of Pennisetum americanum (L.) Leeke
AU - Rao, M. Krishna
AU - Koduru, Prasad R K
PY - 1978/2
Y1 - 1978/2
N2 - In one of the plants of the inbred line IP 1475 of Pennisetum americanum (L.) Leeke, spontaneous chromosome breakage was observed. Distribution of the breaks was non-random and was confined to the centromeres and to the chromosome ends. Breakage in the centric region was twice as frequent as that in the end segments. Further, nucleolar chromosomes were involved less frequently than others in breakage and stickiness. Other meiotic abnormalities like asynapsis, exaggeration and stretching of the centromere, chromosome stickiness and neocentric activity were also observed in the same plant. All these abnormalities were interpreted to be the features of breakdown of the genetic system resulting from the enforced inbreeding of the normally cross pollinated species.
AB - In one of the plants of the inbred line IP 1475 of Pennisetum americanum (L.) Leeke, spontaneous chromosome breakage was observed. Distribution of the breaks was non-random and was confined to the centromeres and to the chromosome ends. Breakage in the centric region was twice as frequent as that in the end segments. Further, nucleolar chromosomes were involved less frequently than others in breakage and stickiness. Other meiotic abnormalities like asynapsis, exaggeration and stretching of the centromere, chromosome stickiness and neocentric activity were also observed in the same plant. All these abnormalities were interpreted to be the features of breakdown of the genetic system resulting from the enforced inbreeding of the normally cross pollinated species.
KW - americanum
KW - Asynapsis
KW - in-breeding depression
KW - non-random breakage
KW - Pennisetum
UR - http://www.scopus.com/inward/record.url?scp=77951506682&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77951506682&partnerID=8YFLogxK
U2 - 10.1007/BF03046868
DO - 10.1007/BF03046868
M3 - Article
AN - SCOPUS:77951506682
VL - 87
SP - 29
EP - 35
JO - Proceedings of the Indian Academy of Sciences - Section B
JF - Proceedings of the Indian Academy of Sciences - Section B
SN - 0370-0097
IS - 2
ER -