Early-generation Testing for Developing Maize Inbreds with Drought Tolerance and Resistance to Turcicum Leaf Blight and Streak Virus in Uganda
Abstract
176 words
In maize breeding, test crosses can be done in early stages of
selfing or delayed until inbreds are close to homozygosity at
F5 or F6. Although early generation testing may be efficient
there is need to obtain information on genetic components of
variance and on inbred-hybrid correlations for performance and
disease traits, in order to develop an effective selection strategy
for inbreds that will produce high yielding, drought tolerant, and
disease resistant hybrids. Therefore, a study was carried out at
National Crops Resources Research Institute (NaCRRI), to
determine the relative magnitude of genetic and genotype x
environment variances among early generation testcrosses, for
maize streak virus (MSV) and turcicum leaf blight (TLB),
anthesis-silking interval (ASI), yield and inbred testcross
correlation. Analyses of 89 F3 families showed a significant
positive relationship between F2 and F3s for silking date, ASI,
TLB and plant aspect (PA). Correlation regression and narrow
sense heritability of these traits were positive and significant
for SD, TLB and PA. Narrow Sense Heritability (NSH) was
44% for ASI, 35 for SD and 25% for TLB.
Subjects
1 categoryRelated papers
More in Working Document Series →- Detection, isolation and baseline characterization of indigenous PhlD+ fluorescent Pseudomonas species for the control of bean root rot and coffee wilt disease in Uganda
- Makerere University Regional Centre for Crop Improvement: A model Training and Research Hub for Next Generation of Plant Breeders for Africa
- Report on the implementation of the RUFORUM Post-Doctoral Fellowship: Enhancing crop productivity and household food security among smallholder farmers in Zimbabwe
- Consumer preferences and willingness to pay for edible mushrooms: An evidence from a choice experiment study in Ghana