Evaluation of Flower Yield, Seed Production and Effect of Time on the Genetic Recombination of Sweetpotato Parents in the Rainforest Agro-Eco-Zone of Umudike Southeastern Nigeria

International Journal of Agriculture & Environmental Science

© 2019 by SSRG - IJAES Journal

Volume 6 Issue 3

Year of Publication : 2019

Authors : I.I. M. Nwankwo, E..C. Opara, , O.K.. Akinbo, C.P. Obasi & T.C. Njoku

10.14445/23942568/IJAES-V6I3P102

How to Cite?

I.I. M. Nwankwo, E..C. Opara, , O.K.. Akinbo, C.P. Obasi & T.C. Njoku, "Evaluation of Flower Yield, Seed Production and Effect of Time on the Genetic Recombination of Sweetpotato Parents in the Rainforest Agro-Eco-Zone of Umudike Southeastern Nigeria," SSRG International Journal of Agriculture & Environmental Science, vol. 6,  no. 3, pp. 7-13, 2019. Crossref, https://doi.org/10.14445/23942568/IJAES-V6I3P102

Abstract:

A hybridization experiment was conducted at the National Root Crops Research Institute, Umudike, Nigeria with the aim to select : parents that are high flowering, parents with high compatibility, parents with high number of good seeds and to know the best time for genetic recombination. The treatment consisted of 14 parents. Seven of the parents were planted each in a plot at a planting space of 30cm by 100cm within plants and inter row spacing. There were spacing of 1.0m between plots, giving a plant population of 30 plants per plot and laid out in a randomized complete block design replicated three times. The other seven parents were maintained in different plots for pollen collection. Data were collected from 3.0pm to 5.0pm for emerged flowers which were counted and recorded, number of flowers covered, number of flowers pollinated, number of capsules formed, number of flowers aborted, number of seeds obtained from crosses, number of good seeds, number of unfilled seeds and percentage of good seeds. Data collected were statistically analyzed using ANOVA while means separation was done using LSD at 5% probability. Results obtained showed that the variety Tio-joe gave the highest flower production of 2334. The relatively high number of capsules of 347obtained from the cross between UMUSPO/3 and NRSP/2 indicated high compatibility between the two parents suggesting that the two parents could be used for further recombination. The seedling progenies resulting from the good seeds produces a remixing or reshuffling of genetic material and phenotype variability on which selection could be based. Time of pollen fertility and stigma receptivity in sweetpotato plants was highest between the hours of 7.00 to 9.00am. Families with heavier seeds weights have more energy reserves for germination and seedling growth and produce larger, more established seedlings after germination

Keywords:

Parents, recombination, flowers, time and seeds.

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