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Cocoa progeny trials on Bal estates

by Shearing, C.H; Lim, H.K.
Publisher: Ago 1971Subject(s): THEOBROMA CACAO | PRUEBAS DE DESCENDENCIA | PROGENIE | RENDIMIENTO | PERDIDAS DE LA COSECHA | CONTROL DE ROEDORES | CLONES AMELONADOS | CLONES TRINITARIOS | CLONES AMAZONAS | MALASIA | SABAH | THEOBROMA CACAO | PROGENY TESTING | PROGENY | YIELDS | CROP LOSSES | RODENT CONTROL | MALAYSIA | SABAH | THEOBROMA CACAO | EPREUVE SUR LA DESCENDANCE | DESCENDANCE | RENDEMENT | PERTE DE RECOLTE | LUTTE ANTIRONGEUR | MALAISIE | SABAH In: Planter (Malasia) v. 47(545) p. 351-363Summary: Of the two early progeny trials planted on BAL Estates as part of the Sabah Government cocoa breeding programme, one compares the performance of Amelonado seedlings with that of three Amelonado x Amazon families and one Amelonado x Trinitario cross, while the second compares Amelonado seedlings with two inter-Amazon progenies and three crosses between Amazon and Trinitario types. Growth and yield results so far obtained from these two trials show that on our basalt soils the performance of all the hybrids tested is much superior to that of Amelonado seedlings. Since there is a difference of one year in the age of the cocoa in the two trials, direct comparison of the yield capacities of all the progenies is not possible. From the results to-date however it is clear that the crosses UIT1 x Na33, Pa35 x Na32, UIT1 x Na32, Pa7 x Na32 and Am1 x Pa7 are the best adapted to local conditions. All these crosses showed good vigour during immaturity and their early potential has been confirmed in the yielding period, with between 4000 and 5000 lb of dry cocoa beans being produced per acre during the period September 1969 to July 1970. Pod values and bean weights are satisfactory for all these promising crosses with Am1 x Pa7 the poorest of the five in this respect. Although the appearance of profuse flowering in some of these crosses raised doubts regarding their suitability for commercial planting, recent findings have largely removed our concern over this characteristic.
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++ 6 tab. 4 ref. Sum. (En)

Of the two early progeny trials planted on BAL Estates as part of the Sabah Government cocoa breeding programme, one compares the performance of Amelonado seedlings with that of three Amelonado x Amazon families and one Amelonado x Trinitario cross, while the second compares Amelonado seedlings with two inter-Amazon progenies and three crosses between Amazon and Trinitario types. Growth and yield results so far obtained from these two trials show that on our basalt soils the performance of all the hybrids tested is much superior to that of Amelonado seedlings. Since there is a difference of one year in the age of the cocoa in the two trials, direct comparison of the yield capacities of all the progenies is not possible. From the results to-date however it is clear that the crosses UIT1 x Na33, Pa35 x Na32, UIT1 x Na32, Pa7 x Na32 and Am1 x Pa7 are the best adapted to local conditions. All these crosses showed good vigour during immaturity and their early potential has been confirmed in the yielding period, with between 4000 and 5000 lb of dry cocoa beans being produced per acre during the period September 1969 to July 1970. Pod values and bean weights are satisfactory for all these promising crosses with Am1 x Pa7 the poorest of the five in this respect. Although the appearance of profuse flowering in some of these crosses raised doubts regarding their suitability for commercial planting, recent findings have largely removed our concern over this characteristic.

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