Soybean is the world’s leading source of vegetable protein and demand for its seed continues to grow. Breeders have successfully increased soybean yield, but the genetic architecture of yield and key agronomic traits is poorly understood. We developed a 40-mating soybean nested association mapping (NAM) population of 5,600 inbred lines that were characterized by single nucleotide polymorphism (SNP) markers and six agronomic traits in field trials in 22 environments. Analysis of the yield, agronomic, and SNP data revealed 23 significant marker-trait associations for yield, 19 for maturity, 15 for plant height, 17 for plant lodging, and 29 for seed mass. A higher frequency of estimated positive yield alleles was evident from elite founder parents than from exotic founders, although unique desirable alleles from the exotic group were identified, demonstrating the value of expanding the genetic base of US soybean breeding.
Objectives
Despite the centrality of parent-adult child relations, prior research has found only weak associations with parent well-being. There is a need to give more explicit attention to the relations of parents with multiple children, and the potentially mixed or “ambivalent” nature of those relations. These patterns may differ for mothers and fathers.
Methods
Wave 1 of the National Survey of Families and Households provides detailed information on relations between parents and each of their adult children. The sample includes 2,297 persons aged 50+ who had at least one child aged 19+.
Results
Measures across multiple adult children uncover more mixed patterns of “collective ambivalence” that include lesser quality and/or contact with at least some children. The presence of less positive relations with any children is consistently, albeit modestly, related to lower parent well-being. Mothers report higher “maximum” quality and interaction across children, but mothers and father do not differ in “minimum” reports. Associations between parent-child relations and well-being are similar for mothers and fathers.
Discussion
Analyses that incorporate the relations of parents with their multiple adult children, viewed as part of a family network, yield a more comprehensive and nuanced view of those relations and their implications for well-being.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.