A nutrient-solution system has been developed that may be useful for selection of iron (Fe) efficiency among soybean [Glycine max (L.) Merr.) plants in a greenhouse throughout the year. The objective of our research was to determine the effectiveness of the nutrient-solution system for single-plant selection of Fe efficiency compared with single-plant selection among plants grown on calcareous soil in the field. Selection for Fe efficiency was practiced among F3 plants from six single-cross populations in the field on calcareous Harps soil (fine-loamy, mesic Typic Calciaquoll) during 1985 and 1986 and in nutrient solution during 1985. The progenies of the F3 plants were evaluated for Fe efficiency in the field on calcareous soil in replicated tests during 1986 and 1987. The heritability of Fe efficiency on a single-plant basis as determined by parent-offspring regression averaged 16% for selection in the field during 1986 and 14% for selection in nutrient solution. Heritability of Fe efficiency based on variance component estimates of random lines evaluated in the field during 1986 and 1987, was 17% on a plot basis and 55% on an entry-mean basis. The results suggest that single-plant selection in populations derived from crosses between parents with moderate Fe efficiency is of limited value with either field or nutrient-solution evaluation. With such populations, selection among lines in replicated tests would be most appropriate.
|Original language||English (US)|
|Number of pages||5|
|State||Published - 1989|
ASJC Scopus subject areas
- Agronomy and Crop Science