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Pollen-pistil interactions between autotetraploid and diploid Acacia mangium and diploid A. auriculiformis


Nghiem, QC and Harbard, JL and Harwood, CE and Griffin, AR and Ha, TH and Koutoulis, A, Pollen-pistil interactions between autotetraploid and diploid Acacia mangium and diploid A. auriculiformis, Journal of Tropical Forest Science, 25, (1) pp. 96-110. ISSN 0128-1283 (2013) [Refereed Article]

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Copyright 2013 Forest Research Institute Malaysia

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Development of sterile triploid (3x) planting stock could help manage the risk of invasivity of widely planted Acacia species. Triploids may be derived from crosses of diploid and tetraploid plants. This study investigated the effect of cytotype on pollen-pistil interaction following mating between colchicine-induced tetraploid A. mangium (AM-4x), diploid A. mangium (AM-2x) and A. auriculiformis (AA-2x). Following controlled pollinations, pollen tubes grew well in the style, entered the ovary and penetrated ovules within 72 hours, regardless of the mating type. However, mean number of penetrated ovules per ovary was lower for AM-4x than for AM-2x or AA-2x maternal parents for all cross combinations except for self-pollination. Considering crosses between cytotypes, interspecies had signifcantly greater number of ovules penetrated than intraspecies. However, yields of pods (1.03%) and filled seeds (5.3%) following all inter-cytotype crosses were extremely poor compared with intra-cytotype (7.59 and 76.3% respectively). Thus, there were strong barriers to production of viable 3x seeds, despite the demonstrated absence of pre-zygotic isolation.

Item Details

Item Type:Refereed Article
Keywords:tetraploid, triploid, intra- and inter-cytotype hybridisation, pollen tube, style, ovary
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Forestry sciences
Research Field:Forestry management and environment
Objective Division:Plant Production and Plant Primary Products
Objective Group:Forestry
Objective Field:Hardwood plantations
UTAS Author:Nghiem, QC (Miss Quynh Nghiem)
UTAS Author:Harbard, JL (Ms Jane Harbard)
UTAS Author:Griffin, AR (Professor Rod Griffin)
UTAS Author:Koutoulis, A (Professor Anthony Koutoulis)
ID Code:82771
Year Published:2013
Web of Science® Times Cited:8
Deposited By:Plant Science
Deposited On:2013-02-18
Last Modified:2015-07-24

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