Expression of the narrow leaflet gene for yield and agronomic traits in soybean.

Genes that affect plant form and function may be used to enhance the yield of soybean [Glycine max (L.) Merr.]. Most soybean cultivars have broad (ovate) leaflets. A single gene, ln, controls inheritance for the narrow leaflet characteristic. Narrow leaflet cultivars (ln/ln) also tend to have a higher percentage of four-seeded pods than ovate (Ln/Ln) leaflet cultivars. Heterozygous (Ln/ln) plants have a leaflet shape intermediate between narrow and ovate. Determining the agronomic effects of the narrow leaflet allele (ln) in the heterozygous (Ln/ln) condition in soybean may have applications in practical plant breeding. We studied an ovate leaflet and a narrow leaflet cultivar, crosses between them in the F(1) and F(2), and backcrosses to both cultivars. The ratio of leaflet width to leaflet length accurately distinguished among narrow, ovate, and intermediate leaflet plants in the F(2) and backcross generations. In the F(2) generation, differences occurred among plants with different leaflet morphology. Narrow leaflet plants produced more seeds per pod and lower seed weight than ovate leaflet plants. Narrow and ovate leaflet plants produced comparable numbers of pods per plant and plant yield. Compared to ovate leaflet plants, intermediate leaflet plants produced similar numbers of seeds per pod and seed weight. Intermediate leaflet plants produced significantly more pods per plant and plant yield than plants with either ovate or narrow leaflets. The heterozygous condition at the locus for leaflet morphology resulted in heterosis for plant yield and may be of benefit in association with commercialization and development of hybrid soybean.

A primary health care approach using Hispanic outreach workers as nurse extenders.

In an effort to improve the health of Hispanic families, particularly prenatal women and infants, the county health department instituted a program of intensified home visits using bilingual, bicultural nurse extenders within a framework of primary health care. The outreach workers offer basic health information to improve families' skills and knowledge, and to assist with linkages to community resources. Public health nurses provide assessment, establish a plan of care, evaluate progress, and supervise the workers. The program has resulted in increased numbers of individuals receiving services, more women registering earlier for prenatal care and the Women, Infants, and Children's (WIC) program, and increased numbers of infants receiving WIC services and regular medical supervision. Public health nurses report increased knowledge and positive changes in families' health behaviors. In addition, the program has strengthened relationships between the health department and Hispanic families.

Prevalence of hypertension risk factors among Hispanic Americans.

A program of blood pressure screening, education, and follow-up was established to meet concerns that Hispanics were at risk for hypertension and related health problems, including access to health care and information. The program provided opportunities to gather data on hypertension risk factors and general health status of the Hispanic population. Bilingual community workers provided blood pressure screening through a door-to-door survey of 3399 adults. In addition, the workers provided general and preventive hypertension education, obtained health histories, and referred identified health problems. All 203 persons identified with hypertension were assessed further and followed by public health nurses. Of these, 67 were referred to physicians for care. Referrals for other types of health problems were made for 1603 persons. Significant risk factors identified for hypertension were excessive alcohol intake, obesity, and frequent use of processed foods. A total of 871 persons reported at least one symptom of stress.