Browsing by Author "Kaswahili, Christina Revocatus"

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Developmet of single cross maize hybrids on earliness and yield for lowland areas of eastern Tanzania
(Sokoine University of Agriculture, 2014) Kaswahili, Christina Revocatus
A study was conducted to develop single cross maize hybrids for earliness and yield suitable for the lowlands of Eastern Tanzania. The objective of this research was to study the nature of inheritance of earliness in maize genotypes for increased maize yield in the Eastern zone of Tanzania. Seven inbred lines from Chollima Research centre were used in a 7x7 diallei cross to obtain 42 F1 hybrids. Evaluation of the hybrids was done at three sites of Dakawa, Uonga and SUA. At Ilonga, the hybrids indicated significant differences for ASI and MC. At SUA only GY of the hybrids showed significance between entries and at Dakawa the hybrids were significantly different on ASI, GW and SW. Across sites the location x entry interaction had significant effects on SW and GY. The entries that gave high yielding across sites were 17, 18, 8, 33, 35 and 40. So these hybrids were recommended for use in the lowlands of Eastern Tanzania to increase grain yield. Inbred lines D and E had good GCA for GY. Lines B and E had good GCA for lateness in AD and crosses with high SCA for lateness in AD such as 19, 7, 24,11, 13, 15, 6 and 38 can be recommended. Inbred lines C and A had good GCA for earliness in SD. Inbred line A had good GCA for shorter ASI. Lines G, C and F had good GCA for R/C while inbred lines A, C, E and F had good GCA for SW. R/C and AD were significantly and positively correlated with yield and their direct effects were high and positive. ASI revealed high negative correlation and direct effect on yield. Research is required to include more diverse accessions and confirm on the performance of the obtained hybrids in future works.