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http://krishi.icar.gov.in/jspui/handle/123456789/71041
Title: | Recurrent selection for yield improvement in sugarcane |
Other Titles: | Not Available |
Authors: | S.Alarmelu, G.Hemaprabha, R.Nagarajan and R.M.Shanthi |
ICAR Data Use Licennce: | http://krishi.icar.gov.in/PDF/ICAR_Data_Use_Licence.pdf |
Author's Affiliated institute: | ICAR::Sugarcane Breeding Institute |
Published/ Complete Date: | 2014-12-16 |
Project Code: | Not Available |
Keywords: | Recurrent selection, Sugarcane, Clones |
Publisher: | Indian Society of Plant Breeders (ISPB) |
Citation: | Alarmelu S et al.,2014 |
Series/Report no.: | Not Available; |
Abstract/Description: | With the increasing need for new sugarcane varieties and rapid increase in economic development, requirements for new sugarcane varieties gains utmost importance. Cane yield is a major driving force for overall improvement on comparison with sucrose. Sugarcane breeding programs have contributed to yield increases in several countries and the potential for selecting higher yielding clones has increased across the years and with 12 generations since inception of sugarcane breeding, more yield progress is to be expected. However, it has been observed that increases in yield are progressively smaller, suggesting that a maximum is being approached, beyond which, further progress would be difficult to achieve. Concerns exist that sugarcane yield may soon plateau or has already reached a plateau caused by exhaustion of genetic diversity. To overcome this problem, sugarcane breeders have tried to increase the genetic variability of basic populations, through an increase in the frequency of favourable genes.,thus allowing more effective exploitation of existing genetic resources. An approach towards selection of better high yielding varieties combining high sucrose through recurrent selection programme is the essential objective of the breeder for the current scenario. This study aims for population improvement through intrapopulation recurrent selection schemes with the aim of pyramiding desirable traits, particularly yield combining quality in required selection cycles. At Sugarcane breeding Institute, Coimbatore, population improvement programme for yield and quality through recurrent selection was initiated in 2007 with 40 diverse parents as base population. The base segregating populations Cycle zero (C 0) was obtained by randomly crossing 20 high yielding parents and high quality parents and four selection cycles were completed. The mean cane yield increased with cycles of selection. Considerable phenotypic variation was found in the population as evidenced from the phenotypic standard deviation and the range increased from C o to C3. Genetic improvement was observed for both yield and quality traits. The heritability estimates at the family means level was intermediate - high for C 1, C2 and C3. The predicted gains from selection in the populations were substantial. Improvement over four cycles of recurrent selection was recorded for the yield and quality traits in this population. Through one cycle of selection, cycle I hybrids showed progress for cane yield traits with an improvement of 27.85%,12.32%, 40.95% and 12.95 % and 8.79 % for cane height (cm), cane thickness, cane weight, stalk number and brix % respectively over base population (Alarmelu et al,2012). An important point on the recurrent selection scheme is that, besides increasing the frequency of favorable alleles, it also maintains sufficient genetic variability to allow genetic improvement in subsequent cycles. There was a substantial improvement for cane weight in four cycles of selection. Cycle 1 and Cycle 2 hybrids showed substantial improvement for cane height While C3 hybrids showed an improvement of 12.21 %, 13.01%, 20.09% and 9.36 %, C4 hybrids showed an improvement of 6.13 %, 9.19%, 22.21 %and 11.02% for cane height (cm), cane thickness, cane weight and stalk number respectively in comparison with the base population Tremendous increase in yield traits could be through this breeding methodology. This new populations developed for yield traits can be introduced into breeding programs.The study suggest that further cycles of selection would result in additional improvement for yield and also indicate the potential of the recurrent selection which will be a good alternative for improving quantitative traits in sugarcane. |
Description: | Not Available |
ISSN: | 0975-928X |
Type(s) of content: | Book |
Sponsors: | Not Available |
Language: | English |
Name of Journal: | National seminar on Challenges and innovative approaches in crop improvement held at AC& RI, Madurai jointly organised by the Indian Society of Plant Breeders, Coimbatore |
Volume No.: | Not Available |
Page Number: | 176 |
Name of the Division/Regional Station: | Coimbatore |
Source, DOI or any other URL: | https://www.researchgate.net/publication/270052324_National_seminar_on_Challenges_and_Innovative_Approaches_in_crop_Improvement_held_at_ACRIMadurai_Tamil_Nadu_Agricultural_UniversityIndia_during_December_16172014 |
URI: | http://krishi.icar.gov.in/jspui/handle/123456789/71041 |
Appears in Collections: | CS-SBI-Publication |
Files in This Item:
File | Description | Size | Format | |
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Madurai Conference.pdf | 920.42 kB | Adobe PDF | View/Open |
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