Indian Society of Genetics & Plant Breeding

Heterosis for biochemical traits governing resistance to shoot fly in sorghum [Sorghum bicolor (L.) Moench.]

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The present investigation is an attempt to study the
heterosis manifested by the hybrids over mid parent and
better parent for biochemical traits of shoot fly resistance
in sorghum [Sorghum bicolor (l.) Moench]. Results
revealed that chlorophyll, epicuticular wax, and protein
content were under the control of both additive and
non-additive gene action. Preponderance of non-additive
gene action was noticed for free phenols and tannin
content. Total sugar was under the influence of additive
gene action. Maximum desirable heterosis over mid parent
was observed for epicuticular wax (81.8%), followed by
chlorophyll (-49.6%) and total sugars (-35.8%). Similar
trend for heterobeltiosis was observed for epicuticular
wax (66.7%), chlorophyll (-43.4%) followed by total free
phenols (24.9%) and total sugars (-22.2%). Hybrid SPSFR
94022A x IS 5636 had considerably higher desirable
heterosis over mid and better parent for total chlorophyll,
total sugars, epicuticular wax and total free phenols
whereas 27A x IS 22144 was the only hybrid to exhibit
desirable positive and significant heterosis over mid parent
for tannin content, and also over better parent though
not at significant level. Heterosis exploitation Is the best
method for exploiting total free phenols and tannin content
for shoot fly resistance. Both parents should have low
protein to develop shoot fly resistant hybrids.

Keywords: Heterosis, biochemical traits, sorghum shoot fly, resistance


Year: 2003
Volume: 63
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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