Abstract
A study was conducted with sorghum (Sorghum bicolor) to analyse and determine the traits having greater interrelationship with grain iron using correlation and path analysis. Four parental lines (IS 2263, IS 13211, IS 10305 and SPV 1359) and 12 hybrids generated by crossing the parents in a full-diallel fashion during postrainy season 2011-12 in Patancheru, Andhra Pradesh, India, were used. Data were recorded on plant height, days to 50% flowering, 100-grain weight and grain yield. All the characters showed positive indirect effect through 100-grain weight and days to 50% flowering, indicating that direct selection for grain size might be helpful in improving the grain iron content. Negative indirect effects of 100-grain weight through other characters were more prominent than its positive direct effect on the grain iron content, thus direct selection for grain weight should be practiced to reduce the undesirable indirect effect. The days to 50% flowering exhibited a positive direct effect and a positive non-significant association with the grain iron content. Hence, selection for this character may be rewarding during the development of iron-rich cultivars. A very high residual effect (0.836) revealed that some more characters closely related with grain iron content need to be included apart from the characters studied.
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Claims 5
Claim · model-written summary
All studied characters had positive indirect effects through grain weight and flowering time.
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Verbatim
e0“All the characters showed positive indirect effect through 100-grain weight and days to 50% flowering”
Claim · model-written summary
Negative indirect effects of grain weight through other characters exceeded its positive direct effect on grain iron.
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Verbatim
e0“Negative indirect effects of 100-grain weight through other characters were more prominent than its positive direct effect on the grain iron content”
Claim · model-written summary
Days to 50% flowering had a positive direct effect on grain iron.
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Verbatim
e0“The days to 50% flowering exhibited a positive direct effect”
Claim · model-written summary
Days to 50% flowering had a positive, nonsignificant association with grain iron.
Not reportedTaxon
Verbatim
e0“The days to 50% flowering exhibited a positive direct effect and a positive non-significant association with the grain iron content.”
Claim · model-written summary
The path model had a residual effect of 0.836.
Not reportedTaxon
Verbatim
e0“A very high residual effect (0.836)”