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Abstract Detail


Genetics Section

Oyelana, Olatunji [1], Ogunwenmo, K. Olusola [1].

Assessment of a pentaploid hybrid from Solanum macrocarpon L. and its induced multiploid mutant (Solanaceae).

Genetic changes through allo- and/or autopolyploidization are the focus of crop improvement research. The backcross between Solanum macrocarpon L. and its induced multiploid mutant yielded a vigorous pentaploid hybrid. The hybrid was taller (105 cm) with larger expanded leaves (35.3 x 21.1 cm) than either parent (85 cm and 18 cm tall; 27.2 x 15.3 cm and 14.1 x 10.7 cm leaf size). Inflorescence was umbellate as in both parents, 8 - 10 flowered but 2 - 4 and 1 - 3 flowered in the parents. Pollen viability was 85.7 % in the pentaploid and respectively 97.3 % and 58.3 % in the maternal and paternal-mutant parent. Self-pollination failed in the hybrid and F2 fruit was obtained only through hand pollination. Fruit was light brown and contained 78 seeds but yellow in both parents with 107 and 67 seeds. Hybrid vigor and gigas morphological features could be attributed to restoration of meiosis and polyploidization. Introgression of genes through backcross to natural species could help stabilize fragmented populations of synthetic and intermediate species within the genus.


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1 - Babcock University, Ilishan-Remo, Dept. of Basic & Applied Sciences, PMB 21244, Ikeja, Lagos, Lagos, 100-001, Nigeria

Keywords:
Backcross
Hybrid vigor
Mutant
Pentaploid
polyploidization
Solanum macrocarpon
Solanaceae.

Presentation Type: Poster:Posters for Sections
Session: P
Location: Ball Room & Party Room/SUB
Date: Monday, July 28th, 2008
Time: 12:30 PM
Number: PGN006
Abstract ID:504

Canceled

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