Effect of foreign pollen on fruit set and quality of 'Monthong' durian
The effect of foreign pollen on fruit set and quality of Monthong durian was studied in two experiments at the Chanthaburi Horticultural Research Center, Thailand. The first experiment investigated the in vitro germination of pollen from five commercial cultivars including Phuangmanee, Longlublae, Chanee, Kadum and Monthong, five lesser-known cultivars namely Nokyhib, Kobmaethao, Chomphoosri, Kanyaosrinak, and Chaymafai, and one hybrid Chanthaburi 3 at different temperatures. Chanthaburi 3 was found to have the highest germination rates among cultivars across the 10 to 35°C temperature range. Consequently, Chanthaburi 3 pollen was chosen to study the effect on Monthong fruit set under two weather conditions, in comparison with Monthong pollen. The percentage of fruit set was not different between 18.5 and 31.6 and 23.3-34.2°C (min-max) temperature conditions. However, the number of fruit set tree‑1 under the cooler condition was significantly higher, at 81 as compared with 65 fruit tree‑1. Similarly, pollen of Chanthaburi 3 did not result in higher fruit set percentage, but the number of fruits tree‑1 was higher than with Monthong pollen. Monthong fruit which were pollinated with pollen from Chanthaburi 3 revealed no significant differences in pulp weight, seed weight, fruit weight, number of aborted seeds and total soluble solids from fruit which were pollinated with pollen from Monthong. Nevertheless, analysis of volatile compounds from fruit pulp with a gas chromatograph-mass spectrometer, using headspace solid phase micro extraction with DVB/CAR/PDMS coated fiber, revealed a slightly different profile between fruit that had been pollinated with Chantaburi 3 compared with that of Monthong pollen.
Korpphaiboon, A., Chuebandit, M., Chutinanthakun, T., Sukjitpaiboonphol, N. and Wattanawichit, W. (2021). Effect of foreign pollen on fruit set and quality of 'Monthong' durian. Acta Hortic. 1312, 299-304
durian, pollen germination, fruit set, climate changes