Journal ID : AMA-18-07-2022-11539
[This article belongs to Volume - 53, Issue - 07]
Total View : 417

Title : CYTOMORPHOLOGICAL ANALYSIS OF INTROGRESSED TRISPECIES DERIVATIVES OF COTTON (G. HIRSUTUM L. X G. BARBADENSE L.) X G. ARBOREUM L.)

Abstract :

Cytological studies of 50 introgressed trispecies derivatives of cotton genotypes obtained in BC1F21 generation of trispecies crosses of [(G. hirsutum x G. barbadanse) x G. arboreum] were carried out to determine the chromosome behavior, yield, morphology and fiber quality traits. Of these 12 introgressed trispecies derivatives were observed most diverse for these traits. During meiosis variation in chromosome number ranging from 47 to 54.5 was observed against the normal chromosomal behavior of G. arboreum (2n == 26) and G. hirsutum (2n=4x=52). Chromosome pairing revealed the presence of univalent, bivalent, trivalent and tetravalent compounds. Yield and morphologically these derivatives increased significantly over the check varieties while fiber quality traits viz., upper half mean length (UHML) and uniformity index were found to be inferior than the check hybrid DCH-32; however, it was found at par with other checks viz., NH-615, DHY-286 and PA-183. The fiber strength was found to be superior over all the checks. These results indicate that these developed lines had introgressed of character from species viz., hirsutum, arboreum and barbadense.

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