Genetic Studies on Fertility Restoration, Heterosis and Combining Ability of Alternaria Tolerant Inbred Lines in Sunflower (Helianthus annuus L.)
KrishiKosh
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Title |
Genetic Studies on Fertility Restoration, Heterosis and Combining Ability of Alternaria Tolerant Inbred Lines in Sunflower (Helianthus annuus L.)
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Creator |
Mohammad Saleem Naiknavar
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Contributor |
K.G. Parameshwarappa
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Subject |
Genetics and Plant Breeding
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Description |
An experiment was conducted to know fertility restoration, heterosis and combining ability and inheritance of Alternaria resistance adopting 12 x 8 Line x Tester design during summer-2011. The study revealed that two hybrids were tolerant for Alternaria disease recording grade 6 at maturity. The inbred TX16R found to be the resistant male parent which restored fertility on most of the CMS lines except CMS300-2A. Among the female lines FMSR265 A was moderately resistant. Two hybrids CMS 103 A x TX 16R and PET 2-7-1Ax TX-16R showed moderate degree of tolerance to Alternaria disease and can be involved in the breeding programme to develop superior inbred lines. The line CMS300-2A appeared to be unique in its diversity as a majority of the lines could not restore fertility CMS 335Ax Tx-16R found to be a good combiner for an array of traits like seed yield, oil yield, disease resistance and head diameter. Among the males line TX 16-R appeared as good combiner for disease resistance and host of other traits like head diameter, per cent seed filling, volume weight and oil content. Among the 48 hybrids CMS335A x TX16R was the only cross that expressed standard heterosis for seed yield over KBSH-44 (23.34 per cent) and oil yield (23.09 percent) over KBSH-1. It was also found to be heterotic for the characters like days to fifty percent flowering, days to maturity, plant height, seed filling-percentage, volume weight, hull content and PDI at maturity. The parents CMS335A and TX16R found to be contrasting with respect to their GCA effects for the characters showing heterotis. Most of the hybrids showing high sca effects were the combination of parents with low x low, high x low gca effects. |
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Date |
2016-11-11T17:58:23Z
2016-11-11T17:58:23Z 2011 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/85203
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Format |
application/pdf
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Publisher |
UAS, Dharwad
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