Effect of Pollen Donor Genotype and Dilution Ratio on the Seed Formation and Fruit Quality in Yellow-fleshed Kiwifruits
2018
Jeong, S.Y., Jeju National University, Jeju, Republic of Korea | Yi, K.U., Jeju National University, Jeju, Republic of Korea | Oh, E.U., Jeju National University, Jeju, Republic of Korea | Hyun, S.W., Jeju National University, Jeju, Republic of Korea | Kang, H.H., Jeju National University, Jeju, Republic of Korea | Song, K.J., Jeju National University, Jeju, Republic of Korea
The study was carried out to evaluate the effect of pollen donor genotype and pollen dilution ratio on fruit quality and seed formation in three yellow-fleshed kiwifruits including 'Halla Gold', 'Sweet Gold', and 'Enza Gold'. Analysis of pollen tube growth indicated that pollen tubes penetrated into ovules through style 2 or 3 days after artificial pollination, but there was a little bit of difference in the number of pollen tubes penetrating into ovules depending on pollen donor genotypes and dilution ratio. Pollen tube growth of 'Bohwa' was better than 'Chieftain' in 'Halla Gold' and 'Sweet Gold', whereas opposite tendency was observed in 'Enza Gold'. The number of pollen tubes penetrating into ovules was the lowest in 20X pollen dilution. Pollination with 'Bohwa' increased the fresh weight and dry matter of fruits than that with 'Chieftain' in all three cultivars. Seed number showed a similar tendency to fruit weight and dry matter in 'Halla Gold' and 'Sweet Gold', but opposite tendency was shown in 'Enza Gold'. The fresh weight and dry matter of fruits was higher in 1-10X compared to that of fruits from 20X dilution and was little affected by dilution ratio. Seed number and 100-seeds weight showed similar tendency to fresh weight and dry matter.
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