| |
| Web URL(s): | https://academic.oup.com/aob/article/69/4/345/172794/
Last checked: 03/01/2017
Requires: PDF Reader |
|---|
| Publication Type:
| Refereed |
|---|
| Author(s): | De Haan, A.;
Maceira, N. O.;
Lumaret, R.;
Delay, J. |
|---|
| Author Affiliation: | Genetisch Institut, Biologisch Centrum Haren, Netherlands; Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata, Argentina; Centre Louis Emberger--C.E.F.E., C.N.R.S., France; Laboratoire de Genetique Ecologique et Biologie des Populations Vegetales, Universite de Lille, France |
|---|
| Title: | Production of 2n gametes in diploid subspecies of Dactylis glomerata L. 2. Occurrence and frequency of 2n eggs |
|---|
| Source: | Annals of Botany. Vol. 69, No. 4, April 1992, p. 345-350. |
|---|
| Publishing Information: | London, Oxford University Press |
|---|
| # of Pages: | 6 |
|---|
| Keywords: | TIC Keywords: Dactylis glomerata; Gametes; Diploids
|
|---|
| Abstract/Contents: | "Whereas polyploidy has been found in more than halfthe Graminae, the occurrence of 2n gametes, a potentially, major mechanism of polyploid production, has been rarely studied. In the present work, the frequency of 2n egg production in nine diploid (n=2x=14) subspecies of the polyploid complex Dacylis glomerata has been estimated by determining the ploidy level of the progeny in 98 2X-4X crosses. The 2n egg origin of the 4X offspring was verified using enzyme markers. The frequency of 2n egg production in each subspecies was estimated from the number of 4X offspring, the number of florets in the seed plant and the fertility of the subspecies.The ploidy level of the progeny was determined by chromosomes counts or nuclear DNA quantification using flow cytometry. Planrts producing 2n eggs were detected in 47% of the fertile crosses, involving eight subspecies. Variability was related to individuals and not to subspecies. Average 2n egg frequency was 0·49% for all crosses, and 1·53% for crosses where 2n egg production was detected. Individual frequencies did not exceed 3·5%, with each other. However, the widespread occurrence of plants producing both kinds of 2n gametes in almost all the studied subspecies, support the hypothesis that tetraploids can be formed anywhere and anytime by sexual polyploidization in diploid populations of Dacylis glomerata L." |
|---|
| Language: | English |
|---|
| References: | 47 |
|---|
| Note: | Tables |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
De Haan, A., N. O. Maceira, R. Lumaret, and J. Delay. 1992. Production of 2n gametes in diploid subspecies of Dactylis glomerata L. 2. Occurrence and frequency of 2n eggs. Ann. Bot. 69(4):p. 345-350. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=23998 |
| If there are problems with this record, send us feedback about record 23998. |
| Choices for finding the above item: |
|---|
| Web URL(s):
https://academic.oup.com/aob/article/69/4/345/172794/
Last checked: 03/01/2017
Requires: PDF Reader |
| 
MSU catalog number: QK 1 .A53 |
| Find from within TIC:
Digitally in TIC by record number. |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
