National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Handling of segregating populations, especially in early generation is a tricky issue. Due to segregation, identification of desirable plant types is quite difficult and at the same time, there are chances of losing them. The aim of this study was to determine selection gain and selection intensity for high yield i.e. to estimate the genetic potential transferred from F2 generation to F3 generation by using a total of 200 progenies were studied in F3 generation during kharif, 2014. All the 200 entries belonging to four selected rice crosses viz. Suraksha x Jalanidhi, Suraksha x RP Bio-226, Suraksha x Phalguna and Suraksha x Mahamaya, were sown separately on 4th July, 2014. The analysis of these early generation selection data was done to estimate selection intensity and selection gain for 200 rice progenies. Highest selection intensity was observed for the crosses Suraksha x RP Bio-226andSuraksha x Jalanidhi, whereas lowest selection intensity was observed for the cross Suraksha x Mahamaya. When comparing selection intensity in between F2 and F3, generations it was increased for all crosses studied in the experiment, indicating that the selections were progressed towards yield improvement. Selection gain is greater than the expected mean yield in F3 generation for the cross Suraksha x Phalguna and Suraksha x Mahamaya i.e., increased for both crosses in next generation, indicating that selection is effective for grain yield. Selection gain is lower than expected mean yield for the cross Suraksha x Jalanidhi, Suraksha x RP Bio-226 i.e., decreased for both crosses in next generation, indicating that selection is ineffective for grain yield.
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