Morphological Descriptors and Heritability as Markers for Oil Yield in Balanites aegyptiaca (L.) Del.: A Potential Biodiesel Xerophyte

Balanites aegyptiaca has been identified as a source of seed oil for biodiesel feedstock. Diversity in its population based on morphological descriptors and seed oil yield has been studied in order to evaluate the variation, association of morphological descriptors with oil yield and inheritance of the traits to facilitate the plans for genetic improvement and its conservation. From seven agro-climatic regions, 56 accessions of B. aegyptiaca were studied to evaluate variability based on morphological descriptors, viz. height, girth, leaf, fruit, pericarp, mesocarp, nut and kernel. The data were subjected to ANOVA, simple measures of variation and D 2 statistics. Genetic variability among morphological descriptors was recorded. High heritability (> 0.8) and genetic advance (~ 360%) make kernel weight a suitable marker for genetic improvement of B. aegyptiaca for oil yield. Cluster analysis revealed that cluster V (Jaipur, Sikar, Jodhpur, Dungarpur, Alwar and Kota regions) had high oil. Cluster II with the highest intracluster distance (10,239) was found to be the most suitable for genetic improvement. The population of B. aegyptiaca in Udaipur, Jaipur, Sikar, Jodhpur, Alwar and Dungarpur may be protected for in situ conservation. The study helps in designing strategy to get enhanced oil from B. aegyptiaca and its conservation.