VARIABILITY AND CORRELATION OF AGRONOMIC CHARACTERS OF MUNGBEAN GERMPLASM AND THEIR UTILIZATION FOR VARIETY IMPROVEMENT PROGRAM Lukman Hakim

Abstract

Information on the variability and correlation between agronomic characters of mungbean accessions with their yield are important for supporting breeding program of the plant. A total of 350 mungbean accessions were evaluated at Muara Experimental Farm, Indonesian Center for Food Crops Research and Development, Bogor, during the dry season of 2005. The experiment was conducted in a completely randomized block design with three replications. Each accession was planted in two rows of 5 m long. Plant spacing was 40 cm x 20 cm, two plants per hill. Correlation and path coefficient analyses were used to quantify<br />the magnitude of the relationship between yield components and grain yield. The variability among the accessions was significant for most of the characters studied, especially for days to maturity, plant height, pods per plant, and seed size. Among the yield components, the number of pods per plant and plant height positively correlated with the grain yield, but the<br />seed size negatively correlated with grain yield. The direct effects of the number of pods per plant and plant height on seed yield as indicated by path coefficient were the highest, while other causal effects were small or negative. Yield variation (1- R2) attributable to the nine yield component variables was slightly high (61.23%), which means that mungbean accessions with high grain yield should have sufficient plant height and high number of pods per plant. Therefore, these parameters (number of pods per plant and plant height) can be used as the selection criteria in mungbean breeding program. These criteria can be visualized during bulk selection on the early generation stage of F2 to F4, and subsequently on line development of individual plant (pedigree) of F5.

Assesment and Utilization of Selection Indices in Improvement of Mungbean

“…This indicates that there was a strong inherent association between them and the genotypic expression of correlation was less influenced by environmental factors. This result confirms the earlier findings of Hakim et al [2008].…”

“…Days to 50 % flowering had nonsignificant positive correlation with grain yield per plant at genotypic level, indicated that early flowering genotypes are desirable for grain yield per plant( Table 1). These results confirm the earlier finding of Hakim (2008). The days to 50 % flowering was positively and significantly correlated with days to maturity, indicated the direct relationship between them and improvement in both the traits as well as yield could be achieved by exercising selection for either of the trait.…”

Assessment of variability and association for seed yield and yield attributing traits among the interspecific derivatives of greengram x blackgram cross

“…All other traits recorded minimum direct effect on seed yield / plant. Present result is in accordance with findings of Hakim (2016). These results clearly showed that major importance needed to be given for number of pods / plant for the improvement of greengram through interspecific hybridization.…”

Modeling the Impacts of Climate Change on Yields of Various Korean Soybean Sprout Cultivars

“…Soweon and Seonam produced 2.58 and 2.2 Mg ha −1 , respectively. Dawon had the lowest grain yield (1.55 Mg ha −1 ), which might be associated with its higher lodging rate [33], small plant height [34,35], lower number of pods per plant [35,36], and small seed size [36]. In addition, Dawon had the lowest GDDs from sowing to flowering (Table 4), which might be associated with its lower yield.…”