| 000 | 03030nam a22004697a 4500 | ||
|---|---|---|---|
| 001 | G73031 | ||
| 003 | MX-TxCIM | ||
| 005 | 20211006084810.0 | ||
| 008 | 121211s ||||f| 0 p|p||0|| | | ||
| 020 | _a92-9146-065-6 | ||
| 040 | _aMX-TxCIM | ||
| 072 | 0 | _aF30 | |
| 072 | 0 | _aH20 | |
| 090 | _aCIS-2671 | ||
| 100 | 1 |
_aTembo, E. _uMaize Production Technology for the Future: Challenges and Opportunities. Proceedings of the Eastern and Southern Africa Regional Maize Conference, 6; Addis Ababa (Ethiopia); 21-25 Sep 1998 |
|
| 110 | 2 | _aCentro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico) | |
| 245 | 0 | 0 | _aHeritability of resistance to grey leaf spot in four maize populations |
| 260 |
_aAddis Ababa (Ethiopia) _bCIMMYT|EARO : _c1999 |
||
| 300 | _ap. 37-41 | ||
| 340 | _aPrinted | ||
| 520 | _aGrey Leaf Spot (GLS) of maize (Zea mays. L.), a fungal disease caused by Cercospora zeae-maydis, is becoming increasingly important in southern and eastern Africa. Inheritance of GLS resistance was studied for four experimental open-pollinated maize populations developed at CIMMYT-Zimbabwe: streak virus resistant versions of highland populations Kitale II and Ecuador 573, and populations ZM605 and ZM607. Individual F2 plants were scored for GLS using a scale of 1 (resistant) to 5 (susceptible) under heavy natural infestation during summer 1996-97. Kitale-SR and Ecuador-SR plants were selfed to make S1's, whereas reciprocal full-sib families were made randomly within both ZM605 and ZM607. The Sl lines and full-sib families were planted in replicated trials at Harare during summer 1997-98 and were artificially inoculated by placing GLS-infected ground leaves into the whorls of 4-week-old plants. GLS was evaluated 3, 5 and 7 weeks after flowering. Heritability of GLS resistance, estimated by parent-offspring regression, was 0.31 and 0.62 for Kitale-SR, 0.37 and 0.50 for Ecuador-SR, 0.27 and 0.26 for ZM607 , and 0.23 and 0.32 for ZM605 on first and last scoring dates, respectively. Phenotypic correlation coefficients for GLS score of offspring with mid-parent ranged from 0.40 to 0.65 for the four populations on the three evaluation dates. Frequency of obtaining highly resistant lines (GLS<2.0) from moderately resistant parents (GLS 2.5- 3.5) was virtually nil. | ||
| 536 | _aGenetic Resources Program | ||
| 546 | _aEnglish | ||
| 591 | _a0103|AL Maize Program|R99-00CIMPU|AGRIS 0102|AJ|3 | ||
| 593 | _aJose Juan Caballero | ||
| 594 | _aINT1617 | ||
| 595 | _aCSC | ||
| 650 | 1 | 0 | _aCercospora |
| 650 | 1 | 7 |
_aDisease resistance _gAGROVOC _2 _91077 |
| 650 | 1 | 0 | _aGenetic inheritance |
| 650 | 1 | 0 |
_91386 _aHeritability _gAGROVOC |
| 650 | 1 | 7 |
_aMaize _gAGROVOC _2 _91173 |
| 650 | 1 | 7 |
_aPlant diseases _gAGROVOC _2 _91206 |
| 650 | 1 | 0 |
_aResearch projects _91237 |
| 650 | 1 | 0 | _aSpots |
| 653 | 0 | _aCIMMYT | |
| 653 | 0 | _aUniversity of Zimbabwe | |
| 650 | 1 | 0 |
_91314 _aZea mays _gAGROVOC |
| 700 | 1 | _aCIMMYT|EARO | |
| 700 | 1 |
_9832 _aPixley, K.V. _gGenetic Resources Program _8INT1617 |
|
| 942 | _cPRO | ||
| 999 |
_c9889 _d9889 |
||