In:
PLOS ONE, Public Library of Science (PLoS), Vol. 18, No. 8 ( 2023-8-10), p. e0289813-
Kurzfassung:
The value of combining hybridization and mutagenesis in sesame was examined to determine if treating hybrid sesame plant material with mutagens generated greater genetic variability in four key productivity traits than either the separate hybridization or mutation of plant material. In a randomized block design with three replications, six F 2 M 2 varieties, three F 2 varieties, and three parental varieties were assessed at Odisha University of Agriculture and Technology, Bhubaneswar, Odisha, India. The plant characteristics height, number of seed capsules per plant, and seed yield per plant had greater variability in the F 2 M 2 generation than their respective controls (F 2 ), however, the number of primary branches per plant varied less than in the control population. The chances for trait selection to be operative were high for all the characteristics examined except the number of primary branches per plant, as indicated by heritability estimates. Increases in the mean and variability of the characteristics examined indicted a greater incidence of beneficial mutations and the breakdown of undesirable linkages with increased recombination. At both phenotypic and genotypic levels strong positive correlations between both primary branch number and capsule number with seed yield suggest that these traits are important for indirect improvement in sesame seed yield. As a result of the association analysis, sesame seed yield and its component traits improved significantly, which may be attributed to the independent polygenic mutations and enlarged recombination of the polygenes controlling the examined characteristics. Compared to the corresponding control treatment or to one cycle of mutagenic treatment, two cycles of mutagenic treatment resulted in increased variability, higher transgressive segregates, PTS mean and average transgression for sesame seed yield. These findings highlight the value of implementing two EMS treatment cycles to generate improved sesame lines. Furthermore, the extra variability created through hybridization may have potential in subsequent breeding research and improved seed yield segregants may be further advanced to develop ever-superior sesame varieties.
Materialart:
Online-Ressource
ISSN:
1932-6203
DOI:
10.1371/journal.pone.0289813
DOI:
10.1371/journal.pone.0289813.g001
DOI:
10.1371/journal.pone.0289813.g002
DOI:
10.1371/journal.pone.0289813.g003
DOI:
10.1371/journal.pone.0289813.g004
DOI:
10.1371/journal.pone.0289813.g005
DOI:
10.1371/journal.pone.0289813.t001
DOI:
10.1371/journal.pone.0289813.t002
DOI:
10.1371/journal.pone.0289813.t003
DOI:
10.1371/journal.pone.0289813.t004
DOI:
10.1371/journal.pone.0289813.t005
DOI:
10.1371/journal.pone.0289813.t006
DOI:
10.1371/journal.pone.0289813.t007
DOI:
10.1371/journal.pone.0289813.t008
DOI:
10.1371/journal.pone.0289813.t009
DOI:
10.1371/journal.pone.0289813.t010
DOI:
10.1371/journal.pone.0289813.t011
DOI:
10.1371/journal.pone.0289813.t012
DOI:
10.1371/journal.pone.0289813.s001
DOI:
10.1371/journal.pone.0289813.r001
DOI:
10.1371/journal.pone.0289813.r002
DOI:
10.1371/journal.pone.0289813.r003
DOI:
10.1371/journal.pone.0289813.r004
Sprache:
Englisch
Verlag:
Public Library of Science (PLoS)
Publikationsdatum:
2023
ZDB Id:
2267670-3
