INTER-CLONAL VARIATIONS IN FRUIT PARAMETERS IN A CLONAL SEED ORCHARD OFTEAK [TECTONA GRANDIS L.)

摘要

Information on inter-clonal variations in reproductive parts of any tree species can better guide and assist us in the selection of better genotypes. A study was conducted in a 33 year old Clonal Seed Orchard (CSO) of Teak [Tectona grandis) comprisingof 13 different clones from two distinct provenances of Angul district of Odisha, India to record the inter-clonal variations in regard to the fruit characteristics. The fruit length and fruit width of the clones studied varied significantly and rangedfrom 1.49 to 1.68 cm and 1.31 to 1.54 cm, respectively. Clone ORANR3 was found to bear fruits having highest length and width while the fruits of clone ORANP7 occupied the lowest value in both the parameters. The weight of 100 fruits was found be maximumunder ORANR6 (49.13gm). On the other hand, clones like ORANP3, ORANP6 and ORANP7 were found to register lowest fruit weight. Most of the fruits of ORANR1 were found viable (70.38%) whereas, fruits of ORANP4 showed the least viability (37.31%). The roleof traits like weight of 100 fruits and fruit viability for further selection and tree improvement programme to obtain superior genotypes was established with the expression ofhigh heritability and moderate genetic advance values. A moderate correlation(0.19) was found between fruit weight and viability of seeds.