Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 2 de 2
Filter
Add more filters

Database
Country/Region as subject
Language
Affiliation country
Publication year range
1.
Braz J Biol ; 84: e264369, 2022.
Article in English | MEDLINE | ID: mdl-36287528

ABSTRACT

Panax vietnamensis Ha et Grushv. is a precious medicinal species native to the tropical forests of Vietnam. Due to habitat loss and over-harvesting, this species is endangered in Vietnam. To conserve the species, we investigated genetic variability and population structure using nine microsatellites for 148 individuals from seven populations across the current distribution range of P. vietnamensis in Vietnam. We determined a moderate genetic diversity within populations (HO = 0.367, HE = 0.437) and relatively low population differentiation (the Weir and Cockerham index of 0.172 and the Hedrick index of 0.254) and showed significant differentiation (P < 0.05), which suggested fragmented habitats, over-utilization and over-harvesting of P. vietnamensis. Different clustering methods revealed that individuals were grouped into two major clusters, which were associated with gene flow across the geographical range of P. vietnamensis. This study also detected that ginseng populations can have undergone a recent bottleneck. We recommend measures in future P. vietnamensis conservation and breeding programs.


Subject(s)
Panax , Humans , Panax/genetics , Panax/chemistry , Vietnam , Plant Breeding , Microsatellite Repeats/genetics , Asian People , Genetic Variation/genetics
2.
Stud Fam Plann ; 22(5): 308-17, 1991.
Article in English | MEDLINE | ID: mdl-1759276

ABSTRACT

This report provides the first reliable statistical data on fertility patterns and the family planning program in the Socialist Republic of Vietnam. Findings are from the 1988 Demographic and Health Survey of Vietnam and the 1989 census survey. The data show that the total fertility rate has declined from over 6 children per woman in the early 1970s to under 4 in the later 1980s. Contraceptive prevalence for modern methods is estimated at 37 percent among married women of reproductive age in 1988. The average duration of breastfeeding is over 14 months; marriage is relatively late. The IUD is the most common contraceptive method and abortion is widespread. The major factors likely to influence fertility and family planning in the future are the government's population policy, improved access to modern methods of contraception, and the institution of new economic policies that are currently under way in Vietnam.


PIP: An analysis of data gathered in the 1988 Vietnam Demographic and health Survey (VNDHS) and the 1989 Census Population Five Percent Sample suggests that the country has been undergoing a process of demographic transition since the reunification of North and South Vietnam in 1975. The total fertility rate has declined from 6.1 in 1969-1974 to slightly under 4.0 in 1988-89. Factors apparently promoting this decline include changes in nuptiality patterns (in 1988, the mean age at marriage was 23.5 years and only 60% of women of reproductive age were married), a low infant mortality rate (50/1000 live births in 1988-89), growing acceptance of the government's 2-child family size norm (desired family size stands at 2.7 children among rural women and 2.3 children among urban women), and a well-organized national family planning program (54% of currently married Vietnamese women 15-44 years of age were contraceptive users in 1988). 63% of contraceptive acceptors use the IUD--the method promoted by the government's family planning effort--but there appear to be problems with the quality of IUDs provided. 45% of ever-users of clinic methods and 19% of users of supply methods utilize the commune health center and another 37% and 24%, respectively, are supplied through district hospitals. The ability of the national family planning program to offer a range of contraceptive choices has been hindered by a severe fiscal crisis in the health sector, and privatization and decentralization are receiving consideration as possible solutions. Local demographers are currently assessing whether further economic renovation is likely to support further demographic transitions or undermine policy enforcement by weakening the influence of rural cadres.


Subject(s)
Contraception/statistics & numerical data , Family Planning Services/statistics & numerical data , Fertility , Adolescent , Adult , Contraception/methods , Contraception/trends , Family Characteristics , Family Planning Services/methods , Family Planning Services/trends , Female , Health Policy , Humans , Infant Mortality , Infant, Newborn , Marriage , Middle Aged , National Health Programs , Vietnam
SELECTION OF CITATIONS
SEARCH DETAIL