Rai, K N and Thakur, R P (1995) Ergot reaction of pearl millet hybrids affected by fertility restoration and genetic resistance of parental lines. Euphytica, 83 (3). pp. 225-231. ISSN 1573-5060
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Abstract
High ergot (Claviceps fusiformis Loveless) susceptibility of pearl millet (Pennisetum glaucum (L.) R. Br.) hybrids has often been associated with the A1 cytoplasm of male-sterile lines (A-lines). To understand the underlying basis of this association and to examine the prospects of breeding ergot-resistant hybrids, we evaluated 56 hybrids and their 15 parental lines for ergot reaction and selfed seedset for 2 years in disease nurseries at ICRISAT Asia Center. Hybrids were made by crossing seven pollen parents (2 susceptible and 5 resistant) onto two resistant and two susceptible A-lines, and their four corresponding maintainer lines (B-lines). A-lines had no selfed seedset while B-lines had 32–75% selfed seedset. Hybrids of A-lines had significantly less selfed seedset than the hybrids of the corresponding B-lines. The reduced seedset of A-lines and their hybrids, however, was not always accompanied by significantly higher ergot susceptibility. Highly resistant hybrids were obtained where both A-lines and pollen parents were highly resistant, regardless of male fertility levels of the hybrids. Thus, although the A1 cytoplasm, by its reduction of male fertility, had a large and significant effect in increasing ergot severity of hybrids, the contribution of nuclear genetic factors of female parents was about 1.8 times larger than that of the cytoplasm.
| Item Type: | Article |
|---|---|
| Divisions: | UNSPECIFIED |
| CRP: | UNSPECIFIED |
| Uncontrolled Keywords: | Pennisetum glaucum, Claviceps fusiformis, cytoplasmic-nuclear male sterility, genetic resistance, pearl millet, ergot |
| Subjects: | Mandate crops > Millets |
| Depositing User: | Mr Sanat Kumar Behera |
| Date Deposited: | 15 Oct 2011 09:33 |
| Last Modified: | 15 Oct 2011 09:33 |
| URI: | http://oar.icrisat.org/id/eprint/2626 |
| Official URL: | http://dx.doi.org/10.1007/BF01678134 |
| Projects: | UNSPECIFIED |
| Funders: | UNSPECIFIED |
| Acknowledgement: | We sincerely thank Dr. C.T. Hash for his sever- al valuable comments on an early version of this manuscript. |
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