Author(s):

Prakashsinh Rathava, SR Patel, DM Patel, HN Patel, Dinisha A and SS Patil

Abstract: A line x tester analysis was undertaken to estimates the magnitude of heterosis in thirty-two hybrids of cotton (Gossypium hirsutum L.) for yield and its components characters in 45 entries including (32 hybrids along with 12 parents and 1 standard check hybrid G. Cot. Hy. 14). The analysis of variance revealed significant differences among the genotypes for all the characters. The mean squares due to genotypes were significant for all the characters except ginning percentage. Significant mean squares were observed among parents for all the characters indicate existence of sufficient variability among the parents except for ginning percentage. Studies revealed that Seven hybrids GSHV 172 x BGDS 1033 (35.11 %), GSHV 172 x CPD 1501 (23.62 %), GSHV 172 x TCH 1824 (44.96 %), GSHV 172 x Suraj (21.67 %), GSHV 172 x RAH 1069 (24.51 %), GSHV 185 x RAH 1069 (24.39 %) and GISV 310 x TCH 1716 (28.72 %) showed significant heterobeltiosis effect. Nine hybrids manifested significant and positive standard heterosis i.e. GSHV 172 x BGDS 1033 (29.27 %), GSHV 172 x CPD 1501 (27.83 %), GSHV 172 x TCH 1824 (30.69 %), GSHV 172 x RAH 1069 (37.64 %), GSHV 173 x TCH 1824 (19.94 %), GSHV 173 x CCH 15-1 (19.78 %), GSHV 173 x RAH 1069 (47.03 %), GSHV 185 x RAH 1069 (37.51 %) and GISV 310 x TCH 1716 (20.38 %). Where ever cross combinations involving either GSHV 172 & GSHV 185 as female parent recorded significant positive heterosis for most of the yield contributing characters. Thus, the female parents GSHV 172 & GSHV 185 can be used within breeding programmes aimed for heterosis breeding after proper evaluation within multi-location trials.

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