Linked Life Data

17548310

Source:http://linkedlifedata.com/resource/pubmed/id/17548310

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2007-6-5
pubmed:abstractText
Cytogenetical comparison was made between high seed set restorers TP-4 and D minghui63 and eminent maintainer line D46B of autotetraploid rice. The meiosis observation demonstrated the genomes of our autotetraploid materials were all 2n = 48, the same as those in mitosis observation. Low percentages of univalent and trivalent in metaphase I (MI) of restorers TP-4 and D minghui63 and in metaphase I (MI) of maintainer line D46B of autotetraploid rice were observed. And the percentages of chromosome pairing were all over 99%, showing eminent cytological character. The frequency of TP-4 and D minghui63 in metaphase I (MI) was 2.00/PMC and 2.26/PMC, respectively. However the frequency of D46B was 6.00/PMC, significantly higher than those of TP-4 and D minghui63. It indicated that the maintainer D46B has better chromosome pairing capability in metaphase I (MI). While, the frequency of lagging chromosomes of the maintainer D46B in anaphase I (AI) was 10.62%, significantly lower than that of TP-4 (19.44%) or D minghui63 (23.14%), and it was close to the level of diploid control (7.30%). In telophase I (TI), maintainer D46B exhibited a lower frequency of microkernel, and in telophase II (TII) the frequency of normal quartered microspore of maintainer D46B was not only higher than that of TP-4 or D minghui63 but also than that of diploid control. The percentage of the cell observed chromosome lagging in A1 and the percentage of abnormal cell in TI showed a greatly significant positive correlation. That may demonstrate chromo some separation in anaphase I (AI) and microkernel formation in telophase I (TI) are controlled by the same dominant single gene or the major gene of QTL.
pubmed:language
chi
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0253-9772
pubmed:author
pubmed:issnType
Print
pubmed:volume
29
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
462-70
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
[Cytogenetical comparison of restorers TP-4 and D minghui63 and maintainer D46B of autotetraploid rice].
pubmed:affiliation
Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China. lwb33123@163.com
pubmed:publicationType
Journal Article, Comparative Study, English Abstract, Research Support, Non-U.S. Gov't