Augmented analysis for yield and pod characteristics of yardlong bean (Vigna unguiculata (L.) Walp. ssp. sesquipedalis Verdc.) lines
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Abstract
The selected forty yardlong bean lines in the sixth generation (F6) of the cross between two parental cultivars were recorded to compare with four cultivars, viz. Bangpra Purple, Bangpra #2 (parental cultivars), Lamnamchee, and Tarnthong (commercial cultivars). The results showed that the forty lines significantly differed in pod length, number of seeds per pod (p<0.01), and yield per hectare (p<0.05). The means for pod length and yield of the lines were significantly higher than the control. Eight lines expressed the pod length ranging from 70.35 to 75.85 cm that are longer than the parent (69.50 cm of Bangpra #2) but not significantly different (p>0.05). Twenty-one lines possessed pod lengths from 61.41 to 75.85 cm that are significantly different (p>0.05) from the commercial cultivar (52.52 cm). The Bangpra #2 cultivar gave the significantly highest yield (19.16 t/ha) compared to the control. There were four promising lines for possessing yields ranging from 20.60 to 22.80 t/h and tended to get more value than the Bangpra #2 cultivar. Most of the selected F6-lines were proven to have better performance than the commercial cultivars, and some cultivars had better performance than their parents. Thus, these promising lines would be selected for yield trials in the next generation.
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