Flowering characteristics and breeding system of Deutzia parviflora
[Objective] The study aims to examine the flowering and breeding characteristics of the native plant Deutzia parviflora, promote the resistance breeding and resource utilization of Deutzia as well as enrich the species of flowering shrubs in the northern region. [Methods] The morphological charact...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Science Press
2025-01-01
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| Series: | Xibei zhiwu xuebao |
| Subjects: | |
| Online Access: | http://xbzwxb.alljournal.net/xbzwxb/article/abstract/20240355?st=article_issue |
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| Summary: | [Objective] The study aims to examine the flowering and breeding characteristics of the native
plant Deutzia parviflora, promote the resistance breeding and resource utilization of Deutzia as well as
enrich the species of flowering shrubs in the northern region. [Methods] The morphological characteristics
of flower organs, flowering phenology, pollen viability, stigma acceptability, and breeding system of D .
parviflora were observed and analyzed. [Results] (1) D . parviflora began to bloom in late April and ended
in mid-May in Beijing. Its flowering type is concentrated flowering, with a group flowering period of
22-23 d and a single flowering period of 8 d, which can be divided into 8 stages. (2) The stigma acceptability
at the petal flattening stage was the strongest, and the pollen viability at the stamen expansion stage
was the highest. (3) The optimal medium for pollen viability determination was: 100.0 g/L sucrose +
0.3 g/L H3BO3 + 0.2 g/L CaCl2. (4) Pollen can be dried and stored in the short term (within 10 d), at
-20 ℃ and -80 ℃ in the medium term (10-30 d), and at -80 ℃ for a long time (more than 30 d). (5)
The pollen-ovule ratio of D . parviflora was 23 695.93, the out-crossing index was 3, the fruit setting
rate of xenogamy was the highest. [Conclusion] There is no apomixis in D . parviflora and the breeding
system is a mixed mating system, dominanted by outcrossing mechanism, requiring pollinators, and it is
more fertile and can be used as a parent for hybrid breeding in the genus Deutzia. Its low self-incompatibility
is not due to dichogamy and herkogamy. |
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| ISSN: | 1000-4025 |