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Journal of Plant Sciences
  Year: 2013 | Volume: 8 | Issue: 1 | Page No.: 24-30
DOI: 10.3923/jps.2013.24.30
 
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Rice Breeding for High Yield by Advanced Single Seed Descent Method of Selection

Malinee Janwan, Tanee Sreewongchai and Prapa Sripichitt

Abstract:
Rice improvement for high yield is important to increase productivity of the crop. The success of breeding program depends on the choice of best parents and selection method. A research was conducted by applying Single Seed Decent (SSD) with Rapid Generation Advance (RGA) for speeding up the breeding cycle and to select elite line at F7 in 2012. A total of 271 recombinant inbred lines (RILs) were obtained in this program. Augmented design in RCBD with 3 replications was performed using standard check varieties (PTT1, CNT1, SPR60, RD31 and RD41). Three lines were observed with significantly higher yield than the best check variety, CNT1. However, only one line was significantly higher for number of filled seed per panicle than the best parent, CH1. All ten top-yielding lines had significantly higher filled seed per panicle than CNT1. Plant height of mostly the top-ten high-yielding lines ranged between 110 to 120 cm and days to 50% flowering all early more than KDML 105. Positive trangressive segregation was observed for 11 of the traits evaluated; however, the frequency was higher for plant height, days to 50% flowering and number of panicles. The result of correlation analysis revealed highly significant and positive correlation between yield and all the eleven traits under study. Stepwise regression analysis identified panicle weight, number of panicle, days to 50% flowering, seed-setting rate and flag leaf length as traits contributing for linear increase in yield. These traits could be considered as critical criteria for selecting high-yielding lines in rice breeding programs.
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How to cite this article:

Malinee Janwan, Tanee Sreewongchai and Prapa Sripichitt, 2013. Rice Breeding for High Yield by Advanced Single Seed Descent Method of Selection. Journal of Plant Sciences, 8: 24-30.

DOI: 10.3923/jps.2013.24.30

URL: https://scialert.net/abstract/?doi=jps.2013.24.30

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