Asymmetrical hybridization between Trillium apetalon and T. tschonoskii for the formation of a hybrid T. miyabeanum (Melanthiaceae)

Maekawa, Ryo; Mitani, T.; Ishizaki, Satomi; Kubota, Susumu; Ohara, Masashi

doi:10.1007/s00606-022-01806-2

Cited by 1 publication

(1 citation statement)

References 57 publications

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“…Pre-pollination barriers under natural conditions may be due to time, space, and availability of pollinators ( Moyle et al., 2014 ). One of the main differences between the C. oleifera and C. yuhsienensis is flowering phenology, which hinders genetic exchange, despite the similarity of their pollinators and geographical location ( Maekawa et al., 2022 ; Yuan et al., 2022 ). Artificial pollination overcame the flowering asynchronism between C. oleifera and C. yuhsienensis and facilitated the genetic exchange between them.…”

Section: Discussionmentioning

confidence: 99%

Unilateral cross-incompatibility between Camellia oleifera and C. yuhsienensis provides new insights for hybridization in Camellia spp

Gong

Chang

et al. 2023

Front. Plant Sci.

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Camellia yuhsienensis was used to cross with Camellia oleifera to improve the resistance of oil camellia anthracnose. However, unilateral cross-incompatibility (UCI) between C. oleifera and C. yuhsienensis was found during the breeding process. Five C.oleifera cultivars and four C. uhsienensis materials were tested to confirm the UCI between C. oleifera and C. yuhsienensis. ‘Huashuo’ (HS) and ‘Youza 2’ (YZ2) were used to represent these two species to characterize the UCI, including pollen tube growth, fertilization and fruit development. The results demonstrated that UCI was prevalent between C. oleifera and C. yuhsienensis. The asynchronous flowering period was a pre-pollination barrier that limited mating between these two species under natural conditions. Interspecific pollen tubes were observed through the styles of these two plants, though the growth rates differed considerably. At 96 hours after pollination, the pollen tube of YZ2 barely entered the ovule, but remained at the base of the style and became swollen. However, the HS pollen tube entered the ovule 48 hours after pollination, double fertilization was observed, and the fruit and seeds developed commonly. Relative to compatible combinations, most unfertilized ovules in incompatible combinations failed to grow, turned brown 150 days after pollination, and the fruits were smaller than expected with uneven enlargement. Investigations on both semi-in vivo and in vitro pollen tubes gave us new idea for thought: the HS style has a stronger inhibitory effect on the interspecific pollen tubes, while calcium alleviates the inhibitory of styles but failed to prevent the appearance of abnormal pollen tube morphology. This study provides useful information on interspecific hybridization between C. oleifera and C. yuhsienensis for understanding reproductive isolation mechanisms and breeding programs in genus Camellia.

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Section: Discussionmentioning

confidence: 99%

Unilateral cross-incompatibility between Camellia oleifera and C. yuhsienensis provides new insights for hybridization in Camellia spp

Gong

Chang

et al. 2023

Front. Plant Sci.

View full text Add to dashboard Cite

show abstract

Asymmetrical hybridization between Trillium apetalon and T. tschonoskii for the formation of a hybrid T. miyabeanum (Melanthiaceae)

Abstract: Asymmetrical hybridization between Trillium apetalon and T. tschonoskii for the formation of a hybrid T. miyabeanum (Melanthiaceae)

Cited by 1 publication

References 57 publications

Unilateral cross-incompatibility between Camellia oleifera and C. yuhsienensis provides new insights for hybridization in Camellia spp

Unilateral cross-incompatibility between Camellia oleifera and C. yuhsienensis provides new insights for hybridization in Camellia spp

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