李再云
长期进行芸苔属栽培种与近缘植物的远缘杂交及细胞遗传学研究。
个性化签名
- 姓名:李再云
- 目前身份:
- 担任导师情况:
- 学位:
-
学术头衔:
博士生导师, 教育部“新世纪优秀人才支持计划”入选者
- 职称:-
-
学科领域:
农艺学
- 研究兴趣:长期进行芸苔属栽培种与近缘植物的远缘杂交及细胞遗传学研究。
男,1962年1月生。分别于1983、1988和1992年在西南农业大学、南京农业大学和四川大学获得学士、硕士和博士学位。1992-1994年在华中农业大学作博士后研究,随后在该校工作至今,现为植物科学技术学院教授,作物遗传育种专业博士生导师。曾在瑞典农业大学,意大利佩鲁甲大学和日本大阪大学进行合作研究。2002年入选教育部跨世纪优秀人才培养计划。长期进行芸苔属栽培种与近缘植物的远缘杂交及细胞遗传学研究,在芸苔属六个栽培种与诸葛菜的属间杂交中发现亲本种染色体组分开的新细胞学现象及其遗传控制机制,获得多种芸苔属种与诸葛菜的属间新材料,为研究细胞分裂中亲本种染色体行为提供了模式材料。以上系列研究结果在Theoretical and Applied Genetics、Hereditas、Plant Breeding、中国科学、自然科学进展、遗传学报等杂志发表12篇论文,并获2003年度教育部提名国家自然科学奖一等奖。现仍在该方面作进一步研究。
-
主页访问
2155
-
关注数
0
-
成果阅读
70
-
成果数
2
【期刊论文】Meiotic behaviour in intergeneric hybrids between Brassica napus and Orychophragmus violaceus
李再云, Z.Y. LI, H.L. LIU and W.K. HENEEN
BRASSICA NAPUS AND ORYCHOPHRAGMUS VIOLACEYS MEIOSIS Hereditas 125 (1996),-0001,():
-1年11月30日
Meiosis was studied in pollen mother cells (PMCs) with 2n=31 in the intergeneric hybrid between Brassica napus L. (2n=38) and Orychophragmus violaceus (L.) O.E. Schulz (2n=24). Three patterns of chromosome behaviour were observed. (Ⅰ) All 31 chromosomes proceeded directly to the second division, giving rise to unreduced gametes. (Ⅱ) Two groups of 12 and 19 chromosomes moved to opposite poles during the first division and produced, after the second division, four daughter chromosomal groups: two with 12 chromosomes and two with 19 chromosomes. Accordingly, these two types of gametes have the same number of chromosomes as found in the gametes produced by the two parental species. They probably contain complete chromosome complements of O. viohweus and B. napus, respectively. (Ⅲ) At anaphase 1, 19 univalents possibly of B. napus origin, moved to the poles in different numbers but most frequently in a 9:10 distribution. Twelve chromosomes, possibly of O. violaceus origin, appeared as six bivalents that lagged behind and were not included in the telophase 1 nuclei. The presumable O. violaceus chromosomes were thus not synchronous with those of B. napus. PMCs with more than 6 bivalents and with univalents at the equatorial plate were the most frequent category observed. There were indications that even in these cells, six bivalents often lagged behind at a later stage. The apparent separation of parental genomes and subsequent formation of pollen with either of the parental genomes (type Ⅱ above) explains the production of plants with 2n=38 of B. napus morphology among the progenies of these hybrids.
-
35浏览
-
0点赞
-
0收藏
-
0分享
-
75下载
-
0评论
-
引用
【期刊论文】Cytogenetics of intergeneric hybrids between Brassica species and Orychophragmus violaceus*
李再云, LI Zaiyun** and LIU Yan
PROGRESS IN NATURAL SCIENCE Vol. 11 No.10,-0001,():
-1年11月30日
In the sexual intergenerie hybrids between the cultivated Brassica species and Orychophragmus violaceus, both complete separation and partial separation of the parental genomes were found to occur during mitosis and meiosis under genetic control. The cytogenetics of these hybrids was species-specific for Brassica parents. The different chromosome behavior of hybrids with three Brassica diploids (B. camtpestris, B. nigra and B. oleracea) might contribute to the different cytogenetics of hybrids with three tetraploids (B. napus, B. juncea and B. carinata). Owing to the parental genome separation, Brassica homozygous plants and aneuploids with various chromosome constitutions were identifiable in the progenies of these hybrids, which were valuable for the study of the structure and evolution of Brassica genome and for the breeding of Brassica crops.
Brassica species,, Orychophragmus violaceus,, intergeneric hybrids,, cytogenetics,, genome separation.,
-
35浏览
-
0点赞
-
0收藏
-
0分享
-
79下载
-
0评论
-
引用