Izvorni znanstveni članak
IN EXPLOITATION OF GENETIC DIVERSITY IN POTATO BREEDING
M. K. Biswas
; College of Horticulture & Forestry, Huazhong Agricultural University, China
M. B. Ahmed
; School of Life Sciences, University of Skovde, Sweden
M. A. A. Mondal
; Department of Botany, University of Rajshahi, Rajshahi, Bangladesh
M. A. Razvy
; College of Horticulture & Forestry, Huazhong Agricultural University, China
A. Hoque
; Department of Botany, University of Rajshahi, Rajshahi, Bangladesh
R. Islam
; Department of Botany, University of Rajshahi, Rajshahi, Bangladesh
M. Hossain
; Department of Botany, University of Rajshahi, Rajshahi, Bangladesh
A. Mandal
; School of Life Sciences, University of Skovde, Sweden
Sažetak
With a view to select divergent parents genetic diversity was estimated among twenty genotypes. Thirty F1 progenies developed by line-tester mating were studied from seedling generation to first clonal generation for five important agronomic traits. Cluster analysis reveals that the parents could be grouped into seven different clusters. Cluster means showed wide range of variation for several traits among singles as well as multi genotypic clusters. Considering diversity pattern, parents should select from cluster I, III, IV and V for the improvement of potato. Analysis of variance revealed that all most all the sources of variation were highly significant for all the studied traits in both generations. Parents Challisha, Lalpakri, Patnai, Chamak, Sadagoti, TPS-67 and TPS-364 were found to be good general combiners for tuber yield and yield contribution traits due to their gca effects. The sca effects showed that out of 30 hybrids 12 were found to have specific combining ability for tuber yield and those hybrids also exhibited considerable heterosis for tuber yield and yield contributing traits.
Ključne riječi
Combining ability; first clonal generation; genetic diversity; heterosis; seedling generation; Solanum tuberosum
Hrčak ID:
68094
URI
Datum izdavanja:
25.2.2011.
Posjeta: 1.678 *