Elimination of micronuclei from microspores in a Brazilian oat (Avena sativa L.) variety

被引：20
|
作者：
Baptista-Giacomelli, FR
Pagliarini, MS [1 ]
de Almeida, JL
机构：
[1] Univ Estadual Maringa, Dept Biol Celular & Genet, BR-87020900 Maringa, Parana, Brazil
[2] Cooperat Agraria Mista Entre Rios, Guarapuava, PR, Brazil
来源：
GENETICS AND MOLECULAR BIOLOGY | 2000年 / 23卷 / 03期
关键词：
D O I：
10.1590/S1415-47572000000300029
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
Chromosome elimination in interspecific hybrids is a powerful tool in breeding programs. Of 12 Brazilian oat varieties recommended for cultivation in southern Brazil, one variety, UFRGS 15, presented a new type of chromosome elimination never described in any other species. Chromosomes that produced micronuclei during meiosis were eliminated from microspores as microcytes. The micronucleus reached the microspore wall and formed a kind of bud, separated from the microspore. The eliminated microcytes gave origin to small and sterile pollen grains. The possible applications of this finding for oat breeding are discussed.
引用
收藏
页码：681 / 684
页数：4
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