Outcrossing rates as affected by pollinators and the heterozygote advantage of Monochoria korsakowii

Wang, Guangxi; Yamasue, Yuji; Itoh, Kazuyuki; Kusanagi, Tokuichi

doi:10.1016/s0304-3770(98)00076-x

Cited by 22 publications

(24 citation statements)

References 13 publications

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“…Our suggestion for this relationship is also supported by a study of out-crossing rates as affected by two bee species, Xylocopa circumvolan (carpenter bee) and Apis cerana japonica (eastern hive bee) pollinating Monochoria korsakowii (Wang et al, 1998). In this tree, X. circumvolan, its larger size, appears to be a more effective pollinator than A. cerana japonica.…”

Section: Discussionsupporting

confidence: 76%

Behavior of major insect pollinators of teak (Tectona grandis L. f.): A comparison of clonal seed orchard versus wild trees

Tangmitcharoen

Takaso

Siripatanadilox

et al. 2006

Forest Ecology and Management

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Section: Discussionsupporting

confidence: 76%

Behavior of major insect pollinators of teak (Tectona grandis L. f.): A comparison of clonal seed orchard versus wild trees

Tangmitcharoen

Takaso

Siripatanadilox

et al. 2006

Forest Ecology and Management

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“…Although self‐pollination before anthesis occurred in the CH flowers of M. vaginalis , the significant difference between the seed production of the “emasculation after flower opening” and the “emasculation and hand pollination” experiments indicated that cross‐pollination after anthesis also can produce seeds (Table 1). No pollinator was observed and no outcrossing occurred in an experimental population of M. vaginalis (Wang et al . 1998) but, in the present study, four insect species, Lasioglossum sibiriacum , Lasioglossum affine , Halictus aerarius , and Sphaerophoria macrogaster , visited the flowers of M. vaginalis in our experimental farm from 29 August to 12 September, 2006.…”

Section: Discussionmentioning

confidence: 99%

“…1997). In a previous study, no outcrossing occurred in the experimental population of M. vaginalis (Wang et al . 1998).…”

Section: Introductionmentioning

confidence: 95%

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Pollination of chasmogamous flowers and the effects of light and emergence time on chasmogamy and cleistogamy in Monochoria vaginalis

Imaizumi¹,

Wang

Tominaga

2008

Weed Biology and Management

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Monochoria vaginalis is one of the most serious weeds of rice fields in Asia.The species has both chasmogamous (CH) and cleistogamous (CL) flowers on individual plants.The objective of this study is to clarify the reproductive characteristics that affect the selfing rate of M. vaginalis.An emasculation experiment revealed that the CH flowers emasculated just after flower opening produced seeds.The seed production in the flowers emasculated just after flower opening was less than that of the flowers emasculated and hand-pollinated with pollen from another plant. These results indicate that, although self-pollination before anthesis occurs, cross-pollination also can produce seeds.An experimental manipulation of light and the emergence time of the plants revealed that more than half of the flowers produced were CL flowers and the CH/CL ratio decreased with reduced light availability.The plants that emerged later produced as many CH flowers as those that emerged earlier.There was no significant difference between the CH and CL flowers in the seed number per fruit and the seed mass. These results suggest that M. vaginalis has reproductive characteristics that make the selfing rate high; however, outcrossing also can occur. Under favorable light intensity conditions, such as on the edges of paddy fields or in fallow fields, M. vaginalis will produce more CH flowers and will have a higher outcrossing rate than in shaded conditions.

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“…The weed has both chasmogamous flowers and cleistogamous flowers in one plant. Monochoria vaginalis is considered a predominantly selfing species because the species is self‐pollinated before its chasmogamous flowers open and often has cleistogamous flowers (Wang et al. , 1998).…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity of sulfonylurea‐resistant and ‐susceptible Monochoria vaginalis populations in Japan

et al. 2008

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Summary Monochoria vaginalis is one of the most serious weeds of rice fields in Asia. The species is predominantly selfing. To reveal the potential for multiple mutational events, outcrossing and gene flow in the sulfonylurea‐resistant (SU‐R) M. vaginalis populations, we investigated (i) if each SU‐R population was a single SU‐R biotype or a mixture of several SU‐R biotypes using restriction analysis or direct sequencing of acetolacatate synthase (ALS) genes and (ii) genetic diversity of SU‐R and ‐susceptible (S) populations using amplified fragment length polymorphism (AFLP) analysis. Nineteen or 20 individuals were sampled from four SU‐R and five SU‐S populations respectively. Amino acid substitutions conferring resistance in the SU‐R populations were Pro197Ser in the ALS1 or ALS3, or Asp376Glu in the ALS1 and each SU‐R population was composed of a single SU‐R biotype. In cluster analysis each SU‐R individual formed a cluster, whereas the individuals from a SU‐S population belonged to different clusters. Some SU‐R populations showed polymorphic AFLP loci. The results indicated that these SU‐R biotypes emerged from a single mutational event and any gene flow of SU‐R genes from adjacent populations did not occur. A low level of outcrossing and recombinations of SU‐R genes occurred within some SU‐R populations of M. vaginalis.

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Outcrossing rates as affected by pollinators and the heterozygote advantage of Monochoria korsakowii

Cited by 22 publications

References 13 publications

Behavior of major insect pollinators of teak (Tectona grandis L. f.): A comparison of clonal seed orchard versus wild trees

Behavior of major insect pollinators of teak (Tectona grandis L. f.): A comparison of clonal seed orchard versus wild trees

Pollination of chasmogamous flowers and the effects of light and emergence time on chasmogamy and cleistogamy in Monochoria vaginalis

Genetic diversity of sulfonylurea‐resistant and ‐susceptible Monochoria vaginalis populations in Japan

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