MARC details
| 000 -LEADER |
|---|
| fixed length control field |
02987nab a22003137a 4500 |
| 001 - CONTROL NUMBER |
|---|
| control field |
60567 |
| 003 - CONTROL NUMBER IDENTIFIER |
|---|
| control field |
MX-TxCIM |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
|---|
| control field |
20211006085156.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
|---|
| fixed length control field |
190619s1969 it |||p|||||| 00| 0 eng d |
| 022 ## - INTERNATIONAL STANDARD SERIAL NUMBER |
|---|
| International Standard Serial Number |
0016-6685 |
| 040 ## - CATALOGING SOURCE |
|---|
| Original cataloging agency |
MX-TxCIM |
| 041 0# - LANGUAGE CODE |
|---|
| Language code of text/sound track or separate title |
eng |
| 100 1# - MAIN ENTRY--PERSONAL NAME |
|---|
| 9 (RLIN) |
9578 |
| Personal name |
Bianchi, A. |
| 245 10 - TITLE STATEMENT |
|---|
| Title |
On the origin of controlling elements in maize |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) |
|---|
| Place of publication, distribution, etc. |
Italy : |
| Name of publisher, distributor, etc. |
Pava, |
| Date of publication, distribution, etc. |
1969. |
| 520 ## - SUMMARY, ETC. |
|---|
| Summary, etc. |
One of the reasons responsibile for the scarce knowledge dealing with gene regulation for higher cells is certainly the difficulty of inducing and detecting the genetic elements involved in such a regulation in higher organisms. However, in maize, McClintock (1951) described at least one manner of inducing and revealing the presence of an active controlling element, obtained in a cell progeny which underwent a"breakage-fusion-bridge" cycle phenomenon. This paper describes a case of detection of controlling elements of the Ac and Spm types, originated in a plant which underwent breakage-fusion-bridge cycles. The Ac element turned out to be located in the chromosome which underwent the cycle, whereas the Spm is located in an undetermined position of the remaining genome. These findings confirm the obseration by McClintock that the cycle is capable of instigating genetic activity, through some mechanism, in the chromosome directly affected by the cycle as well as elsewhere. |
| 520 ## - SUMMARY, ETC. |
|---|
| Summary, etc. |
Una delle principali ragioni responsabili delle scarse conoscenze attualmente disponibili circa i meccanismi di regolazione genica negli organismi superiori è certamente la difficoltà di indurre e riconoscere gli elementi genetici implicati in tale controllo. Peraltro, fin dal 1951, McClintock descriveva una possibilità di generare e mettere in evidenza un sistema di regulazione genica (tipo Dt) a seguito di induzione di cicli di rottura-fusione-ponte per una parte di cariossidi. Gli Autori hanno pure trovato elementi regolatori, del tipo Ac e Spm, nella discendenza di una pianta su cui erano stati osservati cicli di rottura-fusione-ponte per una parte di cariossidi. Il fattore Ac risulta localizzato nel cromosoma 9 che era andato incontro ai cicli menzionati, mentre Spm si trova altrove, ma in posizione sinora indeterminata. I reperti confermano l'osservazione di McClintock che i cicli di rottura-fusione-ponte sono in grado di indurre attività genetica di tipo regolatorio sia nel cromosoma che subisce i fenomeni di cicli che altrove. |
| 546 ## - LANGUAGE NOTE |
|---|
| Language note |
Text in English |
| 546 ## - LANGUAGE NOTE |
|---|
| Language note |
Summary in English and Italian |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
Maize |
| Miscellaneous information |
AGROVOC |
| Source of heading or term |
|
| 9 (RLIN) |
1173 |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
1130 |
| Topical term or geographic name as entry element |
Genetics |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
3563 |
| Topical term or geographic name as entry element |
Genes |
| 650 #7 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Source of heading or term |
AGROVOC |
| 9 (RLIN) |
7014 |
| Topical term or geographic name as entry element |
Chromosomes |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| 9 (RLIN) |
9579 |
| Personal name |
Salamini, F. |
| 700 1# - ADDED ENTRY--PERSONAL NAME |
|---|
| 9 (RLIN) |
9580 |
| Personal name |
Parlavecchio, R. |
| 773 0# - HOST ITEM ENTRY |
|---|
| Place, publisher, and date of publication |
Italy : Pava, 1969. |
| Related parts |
v. 22, n. 4, p. 335-344 |
| Title |
Genetica Agraria |
| International Standard Serial Number |
0016-6685 |
| 856 4# - ELECTRONIC LOCATION AND ACCESS |
|---|
| Uniform Resource Identifier |
http://libcatalog.cimmyt.org/download/reprints/60567.pdf |
| Link text |
Access only for CIMMYT Staff |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
|---|
| Source of classification or shelving scheme |
Dewey Decimal Classification |
| Koha item type |
Article |
| Suppress in OPAC |
No |