ADVANCES IN THE STUDY OF THE INHERITANCE OF IRON CHLOROSIS IN COMMON BEAN
Dry bean (Phaseolus vulgaris L.) cultivars differ in their capacity to assimilate iron when grown on calcareous soils. Such capacity is influenced by environmental factors such as soil pH, soil texture, presence of bicarbonates, organic matter content and temperature. The objective of this study was to investigate the inheritance of iron chlorosis in beans. For that purpose, 11 crosses between nine normal (green) and four cultivars that showed chlorosis when grown on a calcareous soil, were made in the greenhouse. The F2 segregating populations and the progenitors were planted in the Experimental Station of Temple, Texas, of Texas A&M University. The leaf color (greenness) of 1410 F2 plants was measured using a chlorophyll meter. In 10 out of 11 F2 populations, the Chi-square analysis showed a good fit to a 15:1 ratio of normal and chlorotic plants, suggesting that two dominant genes are involved in the capacity to assimilate iron in common beans, and such capacity is expressed when either dominant gene is present.
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Colegio de Postgraduados
1999
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| Online Access: | https://www.agrociencia-colpos.org/index.php/agrociencia/article/view/1579 |
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