New mango hybrid NMBP-1201

Page last updated: Monday, 25 October 2021 - 3:45pm

Please note: This content may be out of date and is currently under review.

Three new mango varieties have been developed by the National Mango Breeding Program (NMBP).

NMBP-1201 is a hybrid cross between Irwin and Kensington Pride (KP).

Yield is greater and more consistent than KP. The fruit has an average weight of 361 grams. It has a soft red to dark red blush over a yellow background and sweet, rich KP-style flavour with a slight tang. It is an early to mid-season variety maturing up to two weeks earlier than KP. It can tolerate hot water dipping and VHT. NMBP-1201 is licensed and protected under Australian Plant Breeder’s Rights legislation.


Characteristics of NMBP-1201
Parentage Irwin♀  x  Kensington Pride
Fruit weight 245-530g, average 361g
Fruit shape Ovate/round with a slight beak and slightly sunken stem attachment
Fruit colour Yellow background with a soft red to dark red blush over 50% of the skin when grown in sun. Fruit inside the canopy do not blush.
Skin thickness Thin to medium
Fruit flavour Sweet rich KP style with a slight Florida tang
Fruit firmness When ripe, it is firm and similar to R2E2
Pulp Colour is yellow/orange with a soft texture and very low fibre. Depth is 30mm
Lenticels Medium size and density, yellow in colour
Seed embryo Polyembryonic
Tree canopy Medium vigour, compact and dense
Cropping 7 year-old trees on KP rootstock in their fourth year of cropping yielded 10-146kg per tree
Harvest season Early to mid-season; between KP and R2E2
Plant Breeder's Rights status Granted by IP Australia on 26 June 2009


Medium to heavy yielding with a tendency for biennial bearing.

NMBP-1201 tree yields from a replicated trial block on Frank Wise Institute (FWI) and one private property (Rewards) near Kununurra, Western Australia, expressed per tree and per hectare at different planting densities

NMBP-1201 yield

KP yield


Western Australia

FWI tree



tree (kg)

185 trees/ha

(9 x 6m)


312 trees/ha

(8 x 4m)



(9 x 6m)


3 year-old

4 year-old 29.1 36.2 5.4 9.1 5.5
5 year-old 19.6

3.6 6.1 7.7
6 year-old 64.2

11.9 20.0 5.9
7 year-old 65.1

12.1 20.3 1.2
8 year-old 60.1

11.1 18.7 16.8


Fruit weight

The average fruit weight of NMBP-1201 was 361g with 24% of fruit in the 460‑540 gram range. About 24% of fruit will pack out at 14 to 16 fruit per 7 kilogram tray, 35% between 16 and 18 fruit per tray, and 18% between 18 and 20 per tray.

More information is available on request.


Fruit maturity indicators

Fruit maturity indicators at harvest for acceptable flavour were evaluated with fruit grown in Kununurra. This information will be used to produce a harvest guide, which is yet to be released.

Minimum fruit maturity indicators to develop acceptable eating quality in NMBP-1201 grown in Kununurra and compared to KP and Calypso standards

Dry matter


Flesh colour

(hue angle)

Total dissolved solids


Titratable acidity


NMBP-1201 11.2 105 7.0 1.4
Calypso 14.0 98 7.0

Kensington Pride 14.0

Harvest timing

NMBP-1201 matures early to mid-season. In some seasons, harvest has been up to two weeks earlier than Kensington Pride at the same location.

More information is available on request.

Postharvest management

Preliminary evaluation of small quantities of NMBP-1201 fruit to assess their postharvest performance after treatment with hot water, vapour heat and irradiation has been conducted.

Hot water and VHT disinfestation

Fruit were treated with hot water dip (HWD) at 46.1°C for 85 minutes and with vapour heat (VHT) at 47°C for 15 minutes. NMBP-1201 responded to hot water and vapour heat treatments with slight fruit softening, some skin browning (3cm2 in 30‑52% of fruit) and a slight increase in lenticel spotting (rating of 2.7 compared to 2.2 in untreated fruit).

However, high temperature preconditioning (8 hours at 30°C) negated almost all skin browning. No increase in fruit rots or delay in skin de-greening was observed. Overall fruit quality was commercially acceptable.

Irradiation disinfestation

NMBP-1201 responded well to irradiation with limited discernible difference between treated and untreated samples. There was minor increase in lenticel spotting on some pieces of treated fruit and both treated and non-treated samples contained fruit that failed to fully colour. This was marginally more noticeable in treated samples. De-greening issues in both treated and untreated samples was observed for both seasons and was presumed to be a production related matter. NMBP-1201 appeared to be a softer variety but irradiation appeared to limit and prevent over ripening.

Observations were made from non commercial samples shipped to Steritech via road and air without ethylene ripening over two seasons, from Darwin and Kununurra. Samples were re-packed into a shaded pattern to observe variations in both colour / ripening stages within treated samples as well as variations between control and treated samples. 

Treated samples were processed on commercial 400Gy New Zealand runs where possible, with the majority of samples achieving an absorbed dose between 500 and 800Gy. Fruit was held at 14 degrees Celsius after treatment. 

It is expected that commercial production volumes will allow a developed understanding and control of unique variables for each variety  important to optimising the treatment process. Ripeness and colour stage of mangoes at time of treatment are well known and important factors for optimising quality. The treatment slows ripening and de-greening (pers. comm. Benjamin Reilly, Steritech Brisbane 2018).

Plant Breeder’s Rights

NMBP-1201 was granted a certificate of Plant Breeder’s Rights in June 2009 giving the breeders and their agents the exclusive rights to manage the propagation, growing and sale of the variety.


This information is also available in Vietnamese (see attachment).


For queries about the National Mango Breeding Program, please contact:

For commercial queries-

For technical information-


Tara Slaven