Genetic Potential of Agronomic Traits and Seed Physicochemical Properties of Novel Jatropha Lines Developed from Complex Interspecific Hybridization

Abstract

Fifteen jatropha lines were obtained from complex crossing between progenies derived from interspecific hybridization of Jatropha curcas and J. integerrima. They were evaluated for variability and association in yield, yield components, oil content, fatty acid composition, phorbol esters content, and growth characters. The major fatty acids in seed were oleic and linoleic acids, with a negative correlation among them. Seed yield showed a positive correlation with number of fruits per inflorescence and seeds per fruit, 100 seed weight and canopy size. A path coefficient analysis showed that number of fruits per inflorescence and canopy width had high positive direct relationship with seed yield per plant. Most characters showed high broad-sense heritability. Clustering by traits classified the breeding lines into five groups with a large distance between groups. The members in each group comprised lines of the same or similar pedigrees. Cluster I was the high seed yield group comprising two accessions (KUJL23 and KUJL18). Clustering based on principle components classified them into four groups. The lines in cluster II and III from cluster analysis were included in one group, while members of the other groups were the same in both clustering methods.

Biomass yield stability of interspecific Jatropha hybrids through multiple harvest rotations with varying harvest ages

“…Muakrong et al (2014) reported that interspecific hybrids of J. curcas and J. integerrima exhibited high heterosis in canopy size, branch number and wood weight. As a result, interspecific hybridization can extend the genetic diversity base of Jatropha and heterosis can be used to increase the biomass potential of Jatropha hybrids (Muakrong and Srinives, 2020). In the current investigation, the KUBJL 14 Jatropha hybrids outperformed the other hybrids in terms of growth.…”

“…However, Jatropha can cross-pollinate with plants of the same genus, specifically, J. integerrima Jacq., a genus of Jatropha (One et al, 2014;Fukuhara et al, 2016). The genetic background of Jatropha hybrids might be enlarged to be more broadly diversified, with hybrids potentially gaining certain useful traits from other plants (Muakrong and Srinives, 2020). Thus, t development of interspecific hybrids between J. curcas and J. integerrima is a method to increase the quantity and quality of Jatropha biomass (Muakrong et al, 2014).…”

Yield productivity enhancement through reduced plant spacing and pruning tolerance of Jatropha hybrids

“…into the hybrid, which increases the chances of selecting Jatropha genotypes with unique and valuable traits. Additionally, heterosis genetics can help improve the yield potential of Jatropha hybrids (Arunyanark et al 2023a;Muakrong and Srinives 2020;Muakrong et al 2014a).Jatropha is a new crop that requires research to identify suitable cultivation methods (Silveira et al 2019). Plant density varies by genotype and environment, so optimal spacing differs (Subbulakshmi et al 2019).…”

“…into the hybrid, which increases the chances of selecting Jatropha genotypes with unique and valuable traits. Additionally, heterosis genetics can help improve the yield potential of Jatropha hybrids (Arunyanark et al 2023a;Muakrong and Srinives 2020;Muakrong et al 2014a).…”