STABILITY OF BRINcJAL HYBRIDS AGAINST FRUIT BORER

Forty eight bonjal hybrids were evaluated along with their sixteen parents and a check
variety (GBH 1) for fruit borer infestation and fruit yield per plant during three
consecutive seasons (environments) viz., kharif-2003 (E1), rabi-summer-2003 (~) and
Summer-2004 (E3). The stability analysis indicated that significant G x E interactions
for both the attributes revealed th~t the genotypes had linear response to environmental
change, while significant pooled deviation suggested that deviation from linear
regression also contributed substantially towards the differences in the stability of
genotypes. Further, linear and non-linear components contributed significantly to the
differences in stability among the genotypes tested. From the point of view of yield and
resistance to fruit borer infestation, six hybrids viz., JBSR 98-2 x Pant Rituraj, ABL 981
x Pant Rituraj, ABL 98-1 x GBL 1, Morvi 4-2 x GBL 1 Morvi 4-2 x PLR 1 and Green
Round x GBL 1 were identified as most widely adapted hybrids on the basis of stability
parameters viz., overall mean no, regression coefficient (bi) and least deviation from
regression (S2di). Thus, these hybrids could be used either for resistance breeding or be
exploited for commercial exploitation of hybrid vigour in brinjal.