Genetic Improvement for Yield and Quality Characters in Pea By Using Selection | ||
| Journal of Plant Production | ||
| Article 5, Volume 7, Issue 8, August 2016, Pages 837-842 PDF (427.55 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpp.2016.46191 | ||
| Author | ||
| A. A. A. El-Dakkak* | ||
| Horticulture Research Institute, Agricultural Research Center, Giza, Egypt | ||
| Abstract | ||
| The present study was carried out at Shandaweel Agricultural Research Station, Sohag Governorate during five winter growing seasons (2011/2012, 2012/2013, 2013/2014, 2014/2015 and 2015/2016) using two F3- populations stemmed from two breeding methods for cross between two varieties of pea (Pisum sativum L.) and pedigree selection procedure was applied to obtain new pure lines of pea having intermediate vegetative growth and desirable yield traits. The mean values for each of all the studied traits after the third cycle of selection (F6 generation)were higher in population II than each of population I, parents and check cultivar. The broad sense heritability was high and ranged from 82.24 to 98 % in all studied traits of all selected generations in population I and population II except number of seeds/pod which seriously was affected by the changes in the environmental factors, so it was low and ranged from 43.45 to 54.35. Also, the actual selection response was high compared with the expected response in F6 generations for number of days to 50% flowering and number of seeds per pod in both populations I&II as well as both number of pods/plant and dry weight of seeds yield/plant in population II only. The realized gains relative to the parents and check were higher in F6-population II than population I for most studied traits. Estimated coefficient of variance (CV%) for the studied characters in the new selected lines of population I was the lowest value for most the genotypes compared with parents and check cultivar and the lowest one was observed for the new line p-21of pop. I in all studied traits except number of seeds/pod. On the whole, in selected new pure lines, data revealed that the line p-21 and line p-24 were the highest homogeneous ones, since they showed the lowest variation within their plants. The obtained CV % values in these pure lines for green pods yield/plant ranged from 2.70 in selected pure line p-24 to 3.79% in line p-21, while were 5.83, 9.42 and 4.68 for parent 1, parent 2 and check cultivar, respectively indicating that these selected pure lines(p-21and p-24) were more uniform than all selected pure lines. The highest green yield were observed for line-p24 followed by line-p25 (215.33 and 193.00 g/plant, respectively). It's clear from the results that some pure lines such as the pure line-p18 line-p21, line-p24 and line-p25 were highest homogeneous for most traits and have desirable traits i.e. earliest, pod length, number seeds/pod and yield/plant. Both lines p21 and p24 were superior for yield of green pods compared with all lines, parents and check variety cultivated in this study. Therefore, It could be recommended to be grown and given special name as a new pea promising cultivars for cultivation in Upper Egypt. | ||
| Keywords | ||
| Pisum sativum; selection; actual response to selection; expected genetic gain; Coefficient of variance | ||
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