Mixed Mating System Are Regulated by Fecundity in Shorea curtisii (Dipterocarpaceae) as Revealed by Comparison under Different Pollen Limited Conditions.
The maintenance of mixed mating was studied in Shorea curtisii, a dominant and widely distributed dipterocarp species in Southeast Asia. Paternity and hierarchical Bayesian analyses were used to estimate the parameters of pollen dispersal kernel, male fecundity and self-pollen affinity. We hypothesized that partial self incompatibility and/or inbreeding depression reduce the number of selfed seeds if the mother trees receive sufficient pollen, whereas reproductive assurance increases the numbers of selfed seeds under low amounts of pollen. Comparison of estimated parameters of self-pollen affinity between high density undisturbed and low density selectively logged forests indicated that self-pollen was selectively excluded from mating in the former, probably due to partial self incompatibility or inbreeding depression until seed maturation. By estimating the self-pollen affinity of each mother tree in both forests, mother trees with higher amount of self-pollen indicated significance of self-pollen affinity with negative estimated value. The exclusion of self-fertilization and/or inbreeding depression during seed maturation occurred in the mother trees with large female fecundity, whereas reproductive assurance increased self-fertilization in the mother trees with lower female fecundity.
Forestry Division, Japan International Research Center for Agricultural Sciences (JIRCAS), Ohwashi, Tsukuba, Ibaraki, Japan; Forestry Biotechnology Division, Forest Research Institute Malaysia (FRIM), Kepong, Selangor Darul Ehsan, Malaysia.
Naoki
N
Tani
Department of Forest Genetics, Forestry and Forest Products Research Institute, Matsunosato, Tsukuba, Ibaraki, Japan.
Yoshihiko
Y
Tsumura
Center for Environmental Biology and Ecosystem Studies, National Institute for Environmental Studies, Onogawa, Tsukuba, Ibaraki, Japan.
Keita
K
Fukasawa
Hayama Center for Advanced Studies, The Graduate University for Advanced Studies, Hayama, Miura-gun, Kanagawa, Japan.
Tomoyuki
T
Kado
Department of Forest Genetics, Forestry and Forest Products Research Institute, Matsunosato, Tsukuba, Ibaraki, Japan.
Yuriko
Y
Taguchi
Forestry Biotechnology Division, Forest Research Institute Malaysia (FRIM), Kepong, Selangor Darul Ehsan, Malaysia.
Soon Leong
SL
Lee
Forestry Biotechnology Division, Forest Research Institute Malaysia (FRIM), Kepong, Selangor Darul Ehsan, Malaysia.
Chai Ting
CT
Lee
Forestry Biotechnology Division, Forest Research Institute Malaysia (FRIM), Kepong, Selangor Darul Ehsan, Malaysia.
Norwati
N
Muhammad
Bureau of International Partnership, Forestry and Forest Products Research Institute, Matsunosato, Tsukuba, Ibaraki, Japan.
Kaoru
K
Niiyama
Shikoku Research Center, Forestry and Forest Products Research Institute, Asakuranishi-machi, Kochi-shi, Kochi, Japan.
Tatsuya
T
Otani
Tohoku Research Center, Forestry and Forest Products Research Institute, Shimokuriyagawa, Morioka, Iwate, Japan.
Tsutomu
T
Yagihashi
Shikoku Research Center, Forestry and Forest Products Research Institute, Asakuranishi-machi, Kochi-shi, Kochi, Japan.
Hiroyuki
H
Tanouchi
Green Forest Resources, Rawang, Selangor Darul Ehsan, Malaysia.
Azizi
A
Ripin
Forestry and Environment Division, Forest Research Institute Malaysia (FRIM), Kepong, Selangor Darul Ehsan, Malaysia.
Abdul Rahman
AR
Kassim
D001499:Bayes Theorem; D003433:Crosses, Genetic; D053958:Dipterocarpaceae / Q000502:physiology*; D005298:Fertility / Q000502:physiology*; D007178:Inbreeding; D018895:Microsatellite Repeats / Q000235:genetics; D011058:Pollen / Q000502:physiology*; D012098:Reproduction / Q000502:physiology; D012639:Seeds / Q000502:physiology; D057945:Self-Fertilization; D014197:Trees / Q000502:physiology