期刊
BREEDING SCIENCE
卷 65, 期 2, 页码 138-144出版社
JAPANESE SOC BREEDING
DOI: 10.1270/jsbbs.65.138
关键词
Eucalyptus urophylla x E. tereticornis; microsporogenesis; flower development
资金
- Special Fund for Forest Scientific Research in the Public Welfare [201404113]
- 111 Project [B13007]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT13047]
We compared microsporogenesis and flower development in Eucalyptus urophylla x E. tereticornis. In this study, although microsporogenesis and cytokinesis occurred simultaneously during meiosis of pollen mother cells, we observed a strong asynchronism in different anthers from a flower bud. The developmental period of microsporogenesis in anthers originated from the long thrum before the short thrum. Flower development was also asynchronous at different locations on a branch. The flower buds grew on the lower side of the branch and showed greater increases in diameter. In addition, we observed a relationship between microsporogenesis development and flower bud diameter growth. Generally, when the pachytene stage was first observed in a small single flower bud growing on top of a flowering branch, the remaining microsporogenesis stages (from diplotene to tetrad) in the whole branch occurred over the next 5-9 days. Thus, the start of microsporogenesis in E. urophylla x E. tereticornis could be determined, which may be applicable to future breeding studies.
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