National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Studies on the genetic basis for resistance to jassid (Amrasca biguttula biguttula) was done in F2 segregating generation of one promising cross of interspecific cotton (Gossypium hirsutum L. X Gossypium barbadense L.) in the year 2015-16. The cross FQT-37 X SB-YF-425 segregated in the ratio of 13:3 for susceptibility and resistant. In the case of resistant type, all the plants were in grade II, implying moderate resistance. This gene action is called as inhibitory gene action. Here, one dominant gene produces the concerned phenotype, while its recessive allele produces contrasting phenotype. The second dominant gene, called inhibitory gene, has no effect of its own on the character in question; however, it can stop the expression of the dominant allele of the first gene. The development of high yielding jassid resistance genotypes has become more important in cotton cultivation today. Identification and use of a tolerant/resistant cultivar are of great relevance these days as it is eco-friendly and cost effective.
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