|ISHS Acta Horticulturae 455: V International Mango Symposium
FLORAL SEX EXPRESSION OF KHIEO SAWOEI AND NAM DOK MAI MANGOES GROWN IN TROPICAL AND SUBTROPICAL CLIMATES IN THAILAND
|Authors: ||S. Chaikiattiyos, W. Pongsomboon, M. Dasanonda, P. Anupunt|
Mango yield is poor when compared to other tree fruit crops.
Low yields are associated with irregular flowering in the tropics or failure to set fruit in subtropical regions.
Sex expression of mango flowers may have some influence on determining potential cropping capacity.
The percentage of hermaphrodite (functioning as female) flowers was investigated on 'Khieo Sawoei' and 'Nam Dok Mai' mangoes growing under subtropical (Chiangrai) and tropical (Pichit and Sisaket) climates in Thailand.
Inflorescences of low-yielding 'Khieo Sawoei' mango produced a predominance of male flowers on trees grown in both subtropical and tropical climates.
The percentage of hermaphrodite flowers for 'Khieo Sawoei' mango were 10.7, 12.5 and 17.8 at Chiangrai, Pichit and Sisaket, respectively.
However, the percentages for 'Nam Dok Mai' were much greater at each of the three sites (20.9, 43.5 and 28.1, respectively). The lower percentage of hermaphrodite flowers in 'Khieo Sawoei' mango may contribute to the generally lower fruiting capacity compared to 'Nam Dok Mai.' Relationship between floral sex expression and temperatures are also discussed.
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