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Genetic analysis of traits contributing to stalk sugar yield in sorghum

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Relation http://oar.icrisat.org/1808/
http://dx.doi.org/10.1556/CRC.39.2011.3.15
 
Title Genetic analysis of traits contributing to stalk sugar yield
in sorghum
 
Creator Sanjana Reddy, P
Reddy, B V S
Srinivasa Rao, P
 
Subject Sorghum
 
Description Sweet sorghum (Sorghum bicolor (L.) Moench) is a potential raw material for production
of ethanol that on blending in petrol is expected to meet the energy demand and address the environmental
issues. Well-developed hybrid technology will make the crop remunerative to the
farmers. Hence, gene action and best combining female and male parents for sugar yield in
sweet sorghum (Sorghum bicolor (L.) Moench) and the association of sugar yield with other
agronomic traits was studied in 171 hybrids developed by crossing 19 female parents with nine
male parents in line × tester design and evaluated during both rainy and postrainy seasons of
2006. The significant differences between the seasons for all the traits suggested that these
traits are greatly influenced by the environment. The lines (female parents) ICSA 38, ICSA
479, ICSA 702, ICSA 675 and ICSA 474 and the restorers (male parents), SSV 74 and SSV 84
combined well for sugar yield during rainy season and the lines, ICSA 702, ICSA 38 and ICSA
474 and the restorers, ICSV 93046, SPV 1411 and ICSV 700 combined well during postrainy
season. The magnitude of SCA variance was higher suggesting the importance of non-additive
gene action in inheritance of all the traits though both additive and dominant genes controlled
overall sugar yield during both the seasons. Hence, selection in early generation would be ineffective
and recurrent selection with periodic intercrossing is advocated. However, breeding
good combining restorer parents can fetch high sugar yield in postrainy season. There is an indication
of existence of transgressive segregation for sugar yield that can be exploited. The
sugar yield was weak though significantly correlated with high brix and poor grain yield during
both the seasons requiring extensive crossing to improve these traits simultaneously.
Keeping in view mean performance, SCA effects and heterobeltiosis, the hybrids, ICSA 474 ×
SSV 84, ICSA 24001 × ICSR 93046 and ICSA 474 × SPV 422 were identified promising for
rainy season and the hybrids ICSA 24001 × SPV 1411 and ICSA 511 × ICSV 93046 were identified
for postrainy season.
 
Publisher Akadémiai Kiadó
 
Date 2011
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/1808/1/CerealResComm39_3__453-464_2011.pdf
Sanjana Reddy, P and Reddy, B V S and Srinivasa Rao, P (2011) Genetic analysis of traits contributing to stalk sugar yield in sorghum. Cereal Research Communications, 39 (3). pp. 453-464. ISSN 1788-9170