Heterotic studies for yield and its component traits in desi cotton (Gossypium arboreum L.)

摘要

The investigation was undertaken to estimate standard heterosis with an objective of exploring possibilities of its commercial utilization. The experimental material comprised of 22 crosses along with 8 parents and one standard check (JLA 794) and, grown at Mahatma Phule Krishi Vidyapeeth, Agricultural Research Station, Jalgaon in randomized block design with 3 replications. Observations were recorded for characters namely; seed cotton yield (kg/ha), bolls/plant, average boll weight (g) and ginning percentage. The standard heterosis was calculated over check variety JLA 794. Marked economic heterosis was observed for most of the characters studied .Among all the crosses studied, cross combinations the maximum heterosis for seed cotton yield of JLA 0613XARBa 08-34(17.31%), bolls/plant JLA 0613 x GBav 109(29.1 1%), for average boll weight(g) Turab x GBav 109 (43.30%) and for ginning percentage Turab x JLA 605(3.38%). Where ever cross combinations involving JLA 0613 and JLA 605 as a female parent recorded significant positive heterosis for most of the yield contributing characters. Thus the female parent JLA 0613 and JLA 605 can be used for exploitation of heterosis.