Effects of Male Parents on Pod and Bean Components of Six Fine Cocoa Siblings

Cici Tresniawati, Dani Dani, Edi Wardiana


In cacao crossing process, the genetic symptoms of direct effect of male parent as a pollen source on pod and beans performances generated from their crossing are called as the xenia effect.  The aim of this study was to investigate the effect of male parents on characters of pod and bean components generated from the crossing of several genotypes of fine cacao. The research was conducted at Kalikempit Afdeling of PTPN XII, Tulungrejo Village, Glenmore District, Banyuwangi Regency, East Java Province, at an altitude of 340 m asl, Latosol type of soil, and C type of climate, from May until December 2014. Crossing combinations were (1) DR 38 x DR 1, (2) DR 38 x DR 38, (3) DR 2 x DR 1, (4) DR 2 x DR 2, (5) DRC 16 x DR 38, and (6) DRC 16 x DRC 16.  Variables observed were the quantitative and qualitative characters of pod and bean component. The results showed that male parent DR 1 crossed with female parent DR 2 contributed in increasing fresh bean weight (34.70%), fresh bean/pod weight (44.32%), fresh single bean weight (31.00%), pod apex and base constriction shapes. Meanwhile DR 38 crossed with DRC 16 showed xenia effect on fresh bean weight (47.01%), bean (31.22%), and qualitative characters i.e. the colour of mature pod and the availability of bottle neck. All of crossing combinations produced white colour beans above 85% thus qualified as good. DR 2 and DR 38 are potential male parents to enhance the number of white bean.


Bean; fine cacao; male parent; pod; xenia

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DOI: http://dx.doi.org/10.21082/jtidp.v4n1.2017.p41-48


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