Abstract
Using the 9th and 10th International Mungbean Nursery (IMN) data, quadratic response surface models were developed to predict days to flowering (DF) of mungbean [Vigna radiata (L.) Wilczek] genotypes grown at 11-hr and 30 min and 13-hr and 30-min preflowering mean photoperiod (
Abstract
Sixteen genotypes of mung bean (Vigna radiata (L.) Wilczek var. radiata) were subjected to 18 treatment combinations (environments) resulting from 3 levels of N, 3 planting densities, and 2 planting times. Measurements were made on yield and its components: pods per plant, seeds per pod, and seed weight. Cluster analysis was used to provide an index of similarity of the genotypes for each character. Genetic similarity of the genotypes, as indicated by a “one-trait-at-a-time” analysis, is reflected in their phenetic similarity in an 18 dimensional space corresponding to the 18 environments. No relationship between geographic distribution and genetic diversity was obtained for all characters. Information on the diversity of the components of yield would be useful in choosing parents that yield superior progenies. Pods per plant was the most important component followed by seeds per pod, and seed weight. Selection of parents for the component characters, with regard to high performance and genetic diversity, are expected to follow the same order.
Aqueous diffusates of either Salix erythroflexus (contorted willow) or Robinia pseudoacacia (black locust) were tested as a root-promoting substance on woody plants and Vigna radiata (mung bean). On 8 July 1995 water diffusates were prepared from fresh chopped terminal stems of either willow or locust (680 g) that were steeped in 4 liters of water for 24 hours. Semihardwood cuttings of Chionanthus retusus were double wounded, steeped in either willow, locust, or water for 24 hours followed by a treatment with 3.0% IBA in talc. One additional group of cuttings was treated with 3.0% IBA only. After 75 days, cuttings treated with willow diffusate and IBA produced the greatest number of roots, followed by the locust diffusate and IBA treatments. A similar test using willow diffusate and IBA on softwood cuttings of Chionanthus virginicus resulted in an 80% success rate. A modified mung bean bioassay was used to partially characterize and verify the effects of the diffusates. Diffusates were made from chopped frozen locust or willow terminal stems (10 g/300 ml H2O), stirred for 24 hours. Mung bean cuttings treated with either locust or willow diffusate (5 ml/10 ml H2O) plus 80 ppm IBA produced more roots than IBA or either diffusate alone. A dose response test showed a significant increase in rooting as concentrations increased (H2O,10%, 50%, 75%, and 100%) for both diffusates. Ethyl acetate extractions of each diffusate at pH 3.0 produced more roots than extracts at pH 7.0. A thermal stability test (20 min at 100 °C) on the diffusates showed willow maintained its root-promoting activity, while locust did not.
Correlation of modified water sorption properties with the decline of storage stability of osmotically-primed seeds of Vigna radiata (L.) Wilczek Seed Sci. Res. 7 391 397 Sun, W.Q. Liang, Y. Huang, S. Fu, J
it decreased the yield by 23%, 40%, 30%, 30%, and 60%, respectively, relative to those of the control plants. The effects of B deficiency on root and shoot growth were previously reported for Vigna radiata L. ( Singh et al., 2014 ). Table 2. Leaf
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