PJB-2009-325
DIALLEL ANALYSIS OF SOME QUANTITATIVE TRAITS IN GOSSYPIUM HIRSUTUM L.
NAQIB ULLAH KHAN1, GUL HASSAN2, KHAN BAHADAR MARWAT2, FARHATULLAH1, MOULA BUX KUMBHAR3, AISHA PARVEEN1, UMM-E-AIMAN1, MUHAMMAD ZAFARULLAH KHAN4 AND ZAHOOR AHMAD SOOMRO3
Abstract
Genetic analysis was studied in a 6x6 diallel cross following Hayman’s diallel approach and Mather’s concept of D (additive), H (dominance) genetic components of variation in F1 and F2 hybrids in a randomized complete block design in upland cotton during 2003-05 at the Agricultural Research Institute, Dera Ismail Khan, Pakistan. Additive-dominance model was used for validation of data and design with the intention to decipher the inheritance pattern; gene action and correlation involved in seed cotton yield and yield contributing traits (boll weight and bolls number) and staple length. Genotypes mean values differed significantly (p£0.01) for all the traits. The scaling tests used fully satisfy the pre-requisites of additive-dominance model and the traits i.e., boll weight and staple length in F1 generation showed complete adequacy. All other traits in both generations did not satisfy the assumptions and makes the additive-dominance model partially adequate for the data. Additive component (D) was found significant for boll weight and staple length in both generations and in F1s bolls per plant. Dominance components (H1, H2) were also found significant for all the traits in F1s and non-significant in F2 generation. In F1s the additive gene action was somewhat partial, while in F2s most of traits were controlled by additive gene action with some contradictions between genetic components of variance and Wr/Vr graphs about expression of inheritance. On the basis of transgressive segregation, the selection made in the cv. CIM-1100 F2 population indicated possibilities of prompt and effective improvement in the said traits.
To Cite this article:
Download
