Author(s):

SB Gohil, MB Parmar and DJ Chaudhari

Abstract: A line x tester analysis was undertaken to estimates the magnitude of heterosis in interspecific hybrids of cotton (Gossypium hirsutum L. x Gossypium barbadense L.) for yield and its components characters in 56 entries including (42 hybrids along with 13 parents and 1 standard check hybrid). Analysis of variance indicated the significant difference among the parents and hybrids for all thirteen characters studied which revealed existence of variability among the genotypes. Studies revealed that for seed cotton yield per plant out of 42 cross combinations, 10 hybrids had registered significant positive estimates of heterobeltiosis. The hybrids, GJC 101 x TCB 27 (31.64%) followed by SI 13-31 x ARBB 1302 (29.35%) and GN Cot. 22 x ARBB 1302 (28.83%) had significant value with maximum estimates of heterobeltiosis. Six hybrids had registered significant positive standard heterosis over G. Cot. HB 102, of which, GN Cot. 22 x ARBB 1302 (24.61%) followed by GJC 101 x TCB 27 (22.71%) and AC 738 x ARBB 1302 (20.71%) had significant value with maximum estimates and its attributing characters like total number of bolls per plant, average boll weight, lint yield per plant, seed index and lint index.

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