Author(s):

Amit Kumar Mishra, PK Singh, Mankesh Kumar, Amarendra Kumar, Pawan Kumar and Narendra MC

Abstract: An experiment was conducted in RCBD during Kharif, 2014 and 2015 at Rice section BAU, Sabour to study inter-relationship for different yield and quality attributing traits among 36 rice lines. In the present study, genotypic correlation was higher in magnitude than phenotypic correlations. This indicated that there was strong inherent association among the traits and therefore, the selection based on phenotypic traits could be effective in achieving the genotypic gain for different attributes. Grain yield per plant had significant positive correlation with biological yield per plant, days to 50% flowering and days to maturity at genotypic level, indicating the importance of the characters for yield improvement. Harvest index showed significant and positive phenotypic correlation with grain yield per plant. The kernel elongation ratio showed significant and positive association with kernel length before cooking and L/B ratio at genotypic and phenotypic level. The milling% had significant positive correlation with kernel elongation ratio and significant and negative association with head rice recovery%. In path coefficient analysis at genotypic level, highest direct positive effect observed for biological yield per plant followed by harvest index, panicle length, kernel elongation ratio, days to 50% flowering and amylose content. Biological yield per plant, days to 50% flowering and days to maturity showed positive and significant correlation with grain yield on genotypic level while, only biological yield per plant reflected highest direct positive effect on genotypic level, therefore selection will be effective for this trait. At phenotypic level, harvest index showed highest direct positive effect having positive and highly significant correlation with grain yield per plant. Biological yield per plant, harvest index, panicle length, days to 50% flowering, days to maturity, kernel length before cooking, amylose content and kernel elongation ratio may be considered for genetic improvement of rice. Information about associations and their cause effect can be well utilized as an indicator for effective selection strategies to improve the grain yield along with grain quality. Hence it may be possible to combine grain yield and quality by specific breeding programme like bi-parental mating. This will break the linkage between unrelated traits and leads to more recombinants.

Pages: 1022-1029  |  1465 Views  241 Downloads

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