D189 MDUR79
Overview
D189 MDUR79 is a hybrid durian created by the Malaysian Agricultural Research and Development Institute (MARDI), registered with the Department of Agriculture (DOA) in September 1991 alongside its sibling D188 MDUR78. It is the second of three clones produced from the cross of D24 and D10 -- the trio also includes D190 MDUR88, registered the following year. Together, these three represent the world's first commercial hybrid durian varieties.
What sets D189 apart from its siblings is efficiency. At 27% flesh content, it yields the most edible material relative to total fruit weight of any of the three MDUR clones. D188 achieves only 20%, and D190's flesh percentage is not recorded in its DOA entry. For a fruit where the shell, thorns, and seeds constitute waste, a 27% flesh ratio is a meaningful commercial advantage -- it means more of what the customer pays for.
The other distinguishing feature is color. D189's flesh is described as yellow-orange ("kuning jingga"), a warmer, deeper hue than D188's plain yellow. This orange tint gives D189 a visual identity within the sibling set and may reflect subtle genetic expression differences despite the identical D24 x D10 parentage.
Origin & History
MARDI's durian breeding program was designed to produce varieties that could be recommended to farmers with confidence -- not merely interesting genetic combinations, but clones with proven commercial attributes. The institute selected D24 and D10 as the parental pair and evaluated the offspring systematically for yield, fruit quality, disease resistance, and fruiting precocity.
D189 MDUR79 was selected from this evaluation and registered in September 1991, in the same batch as D188 MDUR78. The third sibling, D190 MDUR88, followed in June 1992. All three were registered from Terengganu, tying them to MARDI's research operations in that state.
The MARDI program represented a generational leap from the DOA's earlier hybridization work. In 1981, the DOA had registered four experimental hybrids (D141-D144) from a crossing program in Selangor, all involving D2 (Data Nina) as a parent. Those DOA hybrids never progressed beyond experimental status -- they were documented for germplasm conservation but not promoted for commercial planting. MARDI, by contrast, built its entire program around the goal of commercial release. The three MDUR clones were evaluated not only for fruit quality but also for disease tolerance, with all three showing moderate to good resistance to Phytophthora patch canker. They were also selected for early fruiting, bearing fruit within 5 to 6 years of planting.
The choice of D24 as a parent was strategic. By 1991, D24 was already one of Malaysia's most commercially proven durians -- a variety with established consumer recognition, wide adaptability, and a creamy bittersweet profile that defined the commercial mainstream. Using D24 as foundation stock meant the offspring would carry commercially validated flavor genetics, while the D10 contribution added complementary traits to the cross.
Characteristics
Size and weight: Medium, averaging 1.3 kg with a range of 1.0 to 1.6 kg. This makes D189 the lightest of the three siblings -- D188 averages 1.65 kg and D190 averages 1.75 kg. The smaller size, however, is offset by the higher flesh-to-fruit ratio.
Shape: Wide elliptic, consistent with D188 and D190. The identical shape across all three clones reflects their shared parentage.
Skin color: Dark green ("hijau tua"). This is the darkest skin color in the sibling set: D188 is light yellowish-green and D190 is green-yellow. The dark green shell provides a clear visual distinction among the three varieties.
Flesh: Thick, yellow-orange in color, with large arils of 1 to 3 per segment. The yellow-orange coloring is D189's most visually distinctive trait -- warmer and deeper than D188's yellow, and shared with D190. The smooth texture and creamy sweet taste ("lemak manis") are consistent across the sibling set, indicating that these flavor and texture traits are robustly inherited from the D24 x D10 cross.
Aroma: Moderate ("sederhana"), the same descriptor applied to D188. Neither clone carries the strong aroma that characterizes D190.
Flesh content: 27%. This is the headline number for D189. To put it in practical terms: from a 1.3 kg fruit, approximately 350 grams is edible flesh. From a D188 fruit averaging 1.65 kg with 20% flesh content, you get approximately 330 grams. D189, despite being the lighter fruit, delivers more edible material. For commercial operations where yield efficiency matters -- and it always matters -- this is a compelling advantage.
Seeds: Medium-sized. Medium seeds in combination with high flesh content suggest a favorable seed-to-flesh ratio, meaning the arils are generously fleshed around moderate-sized seeds rather than having much of the internal volume occupied by large seeds.
The DOA entry for D189 does not record shell thickness or post-harvest cracking time, unlike D188 which specifies both. This is a gap in the comparative data -- we cannot confirm whether D189's higher flesh content correlates with a thinner shell.
Availability
Like its siblings, D189 MDUR79 has been promoted by MARDI for commercial cultivation. MARDI has encouraged durian farmers to plant MDUR78, MDUR79, and MDUR88 together, citing the trio's disease resistance, early fruiting, and high yield as reasons to diversify beyond mainstream clonal varieties.
In practice, D190 MDUR88 has captured most of the public attention. Rebranded as MS88 (MARDI Super 88), it has received dedicated national promotion with 13,000 trees planted under MARDI's direct supervision. D189 has not received comparable individual branding or large-scale planting programs, despite its superior flesh content percentage.
D189's commercial position is somewhat paradoxical. On paper, its 27% flesh content makes it the most efficient producer of edible material among the three siblings. But in the durian market, efficiency alone does not drive demand -- variety recognition, flavor reputation, and marketing narratives matter. MDUR88's rebranding as MS88, with its comparison to Musang King's golden-fleshed appeal, has given it a story that D189 lacks.
Planting material for D189 is available through MARDI and through nurseries that carry the institute's recommended clones. It is not a lost variety or a germplasm curiosity -- it remains part of MARDI's active recommendations. For farmers seeking a hybrid with proven disease tolerance and high flesh yield, D189 offers the strongest flesh-to-weight ratio of the three siblings. Its orange-yellow flesh also provides a point of visual differentiation at the retail level, where color vibrancy influences consumer perception of quality.