QCAV-4
| Denomination: | 'QCAV-4' |
|---|---|
| Botanical Name: | Musa acuminata |
| Applicant/Holder: |
Queensland University of Technology 2 George Street Brisbane, Queensland 4000 Australia |
| Breeder: |
James Langham Dale, Queensland University of Technology, Brisbane City, Australia Robert Maxwell Harding, Queensland University of Technology, Brisbane City, Australia Anthony Peter James, Queensland University of Technology, Brisbane City, Australia Harjeet Kaur Khanna, Queensland University of Technology, Brisbane City, Australia Jennifer Kleidon, Queensland University of Technology, Brisbane City, Australia Upendra Kumar Singh Shekhawat, Queensland University of Technology, Brisbane City, Australia Mark Henning Smith, Queensland University of Technology, Brisbane City, Australia |
| Agent in Canada: |
Smart & Biggar LP 2300 - 1055 West Georgia P.O. Box 11115 Vancouver, British Columbia V6E 3P3 Canada Tel: 604-682-7780 |
| Application Date: | 2020-06-19 |
| Provisional Protection:: | 2021-06-18 |
| Application Number: | 21-10584 |
Variety Description
Variety used for comparison: 'Cavendish Grand Nain'
Summary: The plants of 'QCAV-4' are highly resistant to Fusarium wilt tropical race 4 (TR4) whereas the plants of 'Cavendish Grand Nain' are highly susceptible to Fusarium wilt tropical race 4 (TR4).
Description:
PLANT: triploid, compact crown, drooping growth habit
PSEUDOSTEM: absent or weak tapering, purple, medium to strong intensity of anthocyanin colouration, weak overlapping sheaths, purple inner side of basal sheath
PETIOLE: curved outwards attitude of wings at base
LEAF BLADE: both sides acute shaped base, green midrib on lower side, medium waxiness on the lower side, no glossiness on upper side
PEDUNCLE: large diameter, pubescent, medium to strong curvature,
MALE INFLORESCENCE: narrow ovate shape, closed or slightly opened bracts
BRACT: orange red inner side, broad acute shaped apex
RACHIS: vertical male part, weak prominence of scars, absent or weak persistence of bracts, persistent hermaphrodite flowers
BUNCH: cylindrical shape, medium compactness, many hands, fruit moderately turned up
FRUIT: evenly curved, moderate longitudinal ridges, medium length, medium width (excluding ridges), truncate shaped apex, greenish yellow colour of peel before maturity, medium adherence of peel, persistent floral organs
FLESH: soft
RESISTANCE TO DISEASE: highly resistant to Fusarium wilt tropical race 4 (TR4)
Origin & Breeding History: 'QCAV-4' is a transgenic variety produced from embryonic cell suspensions generated from immature male flowers from the bell of 'Cavendish Grand Nain' at Queensland University of Technology, Brisbane City, Brisbane, Australia in 2004. The resultant cells were regenerated into whole plantlets and multiplied. The presence of transgenes was confirmed by Polymerase Chain Reaction. Plantlets were transferred to Darwin Banana Farm in Darwin, North Territory, Australia. Plants were grown where 'Cavendish Grand Nain' plants were previously grown and had been severely affected by Fusarium wilt tropical race 4. Plants were regularly inspected for Fusarium wilt tropical race 4 symptoms over a three-year period. 'QCAV-4' was selected in June 2019 based on morphological and molecular analysis for resistance to Fusarium wilt tropical race 4.
Tests & Trials: The detailed description of 'QCAV-4' is based on the UPOV report of Technical Examination, application number 2020121, purchased from the Plant Breeders Rights Office, Intellectual Property Australia, Woden, Australia. The trial was conducted in Lambells Lagoon, Northern Territory, Australia, from 2018 to 2022.
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Banana: 'QVAC-4'
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Banana: 'QCAV-4' (left) with reference variety 'Cavendish Grand Nain' (right)
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Banana: 'QVAC-4'
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