Correlation, Regression and Path Analyses of Seed Yield Components in <i>Crambe abyssinica</i>, a Promising Industrial Oil Crop

Abstract

In the present study correlation, regression and path analyses were carried out to decide correlations among the agronomic traits and their contributions to seed yield per plant in Crambe abyssinica. Partial correlation analysis indicated that plant height (X 1 ) was significantly correlated with branching height and the number of first branches (P < 0.01); Branching height (X 2 ) was significantly correlated with pod number of primary inflorescence (P < 0.01) and number of secondary branches (P < 0.05) and negatively correlated with number of first branches (P < 0.01); Number of first branches (X 3 ) was significantly correlated with number of secondary branches (P < 0.01), pod number per plant and 1000-grain weight (P < 0.05); Number of secondary branches (X 4 ) was significantly correlated with seed yield per plant (P < 0.05); Pod number per plant (X 7 ) was significantly correlated with seed yield per plant (P < 0.01) and negatively correlated with 1000-grain weight (P < 0.01); 1000-grain weight (X 8 ) was significantly correlated with seed yield per plant (P < 0.01). Stepwise regression and path analyses indicated that only pod number per plant and 1000-grain weight contributed significantly to seed yield per plant at P < 0.01 and P < 0.05, respectively. The regression formula for contributions of pod number per plant (X 7 ) and 1000-grain weight (X 8 ) to seed yield per plant (Y) is Y = 0.006 X 7 + 1.222 X 8 − 7.191. The path coefficient of pod number per plant to seed yield per plant was 0.967 and that of 1000-grain weight was 0.194. The determination coefficient of pod number per plant and 1000-grain weight to seed yield per plant was 0.983 and the determination coefficient of other agronomic traits was 0.130. Coefficient of variance indicated that the length of primary inflorescence showed the greatest variation, followed by seed yield per plant, pod number per plant, number of secondary branches, branching height, pod number of primary inflorescence, number of first branches, seed yield per plot, 1000-grain weight and plant height. It was suggested that seed yield per plant in Crambe might be improved by increasing the pod number per plant through selection or cultivation, but the negative correlation between pod number per plant and 1000-grain weight also needs to be considered.

Estimates of genetic parameters and path analysis of crambe: An important oil plant for biofuel production

“…According to the path analysis (Table 3), the trait SW presented a strong positive correlation (0.9485) with and a great direct effect (0.5936) on YD, indicating that selection of this trait can provide satisfactory gains in grain yield. A strong correlation between YD and SW (0.821) was found by Huang et al (2013). For SD, the correlation coefficient was high (0.9132), and the direct effect was 0.5089, but the indirect effect of SW was the one that contributed the most (0.5297).…”

“…However, because the cause and effect relationships between the primary and secondary characteristics of yield determinants are not considered in trait selection, one way to expand the efficiency of trait selection is to use path analysis. Such an analysis is a very important tool that can be used to obtain a detailed understanding of the influences of the characters of interest, including revealing the existence of positive and negative correlations and their low and high magnitudes (Huang et al, 2013;Silva, Moro, Moro, Santos, & Buzinaro, 2016). This analysis is also useful for understanding the changes that the selection pressure on a character can trigger in other inter-correlated characters, which can result in favourable and unfavourable modifications in the population.…”

Evaluasi Karakter Morfologi Untuk Perbaikan Genetik Tanaman Pinang ( Areca Cathecu L.) di Padang Pariaman [Evaluation Of Morphological Characters For Arecanut (Areca Cathecu L.) Genetic Improvment In Padang Pariaman]

“…Menurut Huang et al (2013), seleksi berdasarkan karakter fenotipe adalah cara paling umum dalam program pemuliaan tanaman. Cruz dan Carnero (2006) dalam Silva et al (2016), menyatakan bahwa seleksi mempermudah pengukuran dan identifikasi karakter yang berkorelasi dengan parameter yang diinginkan dan memiliki nilai heritabilitas tinggi.…”

Influence of Heavy Metals on Seed Germination and Early Seedling Growth in Crambe abyssinica, a Potential Industrial Oil Crop for Phytoremediation

“…Crambe abyssinica is a Cruciferae member that is a promising industrial oil crop since it shows high seed yield potential and high-erucic acid content in its seed oil [18]- [20]. The erucic acid content in Crambe seed oil was further increased to over 70% by genetic engineering [21].…”