BREEDING MILLET (Pearel millet) FOR FORAGE YIELD UNDER DROUGHT CONDITIONS: 1· COMBINING ABILITY IN DIALLEL CROSSES AMONG FIVE GENOTYPES. | ||||
| Journal of Plant Production | ||||
| Article 8, Volume 29, Issue 10, October 2004, Page 5493-5501 PDF (2.73 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2004.238833 | ||||
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| Authors | ||||
| A. A. EI·Hosary,1; S. A. Omar2; N. Kh. B. EI-Gizawy1; S. K. Abo-gable2 | ||||
| 1Agronomy dept.Fac.of Agric. (Moshtohor) Zagazig Univ., Egypt. | ||||
| 2Plant Genetic Resources Dept. Desert Research Center, Egypt. | ||||
| Abstract | ||||
| Pearl millet (Pennisetum g/aucum (L) R.Br.) is a stable grain crop in the arid and semi-arid regions of Africa and India, and a new forage and grain crop in Egypt. A two year field experiments was conducted at EI-Maghara Research Station (Middle Sinai), Desert Research Center, in summer growing seasons 2001 and 2002 . Half- diallel crossing system was established in summer 2001 season among five genetically diverse varieties and lor promising lines of five -rowed pearl millet to obtain a total of ten crosses. The first parent was the commercial cultivar Shandaweel-1 (P1) and P2(ICMV88130), P3 (ICMV88904) and P4 (ICMV88908), these three lines introduced from Indian by Dr. Ebrahim Eisa (AgricResearch Center; and the fifth parent (Ps) was land race grown by the farmers at the desert of Red Sea (Shlatein and Halayeb). The objective was to determine the influence of hybrid and three systems of water regimes (non stress and stress generated by irrigation at 30, 45 and 60 % available soil moisture depletion, respectively) on fresh and dry forage yield and drought susceptibility index. Significant differences among the five parents and their crosses were detected for fresh and dry forage yield at the three cuts and yield accumulates under the three different water regimes. The two crosses P 1X Ps and P4 x Ps and the fifth parent (Ps) gave the highest mean values for total fresh . weight under the first level of soil moisture (lrri.r), these out yielded the third level of soil moisture (Irri.3) by 28:31, 34.29 and 25.01%, respectively. Whereas the two crosses P4 )( P5 and p, )( Ps as well as the third parent ( P3l gave the highest mean values for total fresh forage yield under the second level of soil moisture (Irri.2) and out yielded by 16.81,19.82 and 4.68% respectively. The magnitudes of gca/sca ratios revealed that additive and additive by additive type gene action were more important for fresh and dry forage yield. The mean square, due to general and specific combining ability, was highly significant for the three traits under different water regimes. Moreover, the mean squares, due to g.c.a. effects, were larger than those due to s.c.a. effects for fresh weight, drought index and dry weight except the third water regime for the same character. | ||||
| Keywords | ||||
| Pearl millet; drought tolerant; drought susceptibility index; combining ability and forage yield | ||||
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