Pollen donor effects on the expression of red flesh colour in kiwifruit
The choice of pollen donor may sometimes affect fruit characteristics of kiwifruit. In this study, flowers of a red-fleshed kiwifruit selection were hand-pollinated with pollen from males of diploid and tetraploid Actinidia chinensis var. chinensis and hexaploid A. chinensis var. deliciosa. The resulting fruit were evaluated for key commercial traits after storage. All fruit had intense red colour in the centre, but those from pollination by the diploid or tetraploid males had significantly more intense red coloration than those from pollination by the hexaploid male. Malic acid, total acid, sucrose and soluble solids concentrations, titratable acidity and total seed weight were all significantly higher following pollination by the diploid male. There were no significant differences among pollen donors in fruit weight or seed number, or in fructose, glucose, total sugar or quinic acid concentrations. These results contribute to our general understanding of pollen donor effects on fruit development, and will be of practical interest to kiwifruit growers when choosing males suitable for pollination of red-fleshed female cultivars.
Seal, A., Blackmore, A., Jaksons, P., McAtee, P. and Cheng, C.H. (2018). Pollen donor effects on the expression of red flesh colour in kiwifruit. Acta Hortic. 1218, 373-380
Actinidia, kiwifruit, pollination, pollen donor, ploidy, red flesh