"7421","11","archive","128",,,"disk0/00/00/74/21","2014-01-28 09:24:54","2018-04-26 09:11:07","2014-01-28 09:24:54","article",,,"show","Library-ICRISAT@CGIAR.ORG",,,"","","","","","","","","","",,,,"Gasura","E","","","","","","","Okori","P","","","","",,,,,"","",,,,,"","","University of Zimbabwe(Harare)","Zimbabwe","Exploiting Grain-Filling Rate and Effective Grain-Filling Duration to Improve Grain Yield of Early-Maturing Maize","pub","s2.6","","","restricted",,,,,"NOTE: Currently Okori, Patrick is scientist at ICRISAT(Malawi)","Early-maturing maize (Zea mays L.) genotypes yield 15 to 30% less than late-maturing genotypes. One strategy for improving grain yield in the early-maturing group involves assessment of grain-filling traits as secondary traits for selection for high grain yield. In this study, we investigated the possibility of using grain-filling rate and duration for improving grain yield in early-maturing tropical maize. Forty-four hybrids generated using North Carolina design II were evaluated at CIMMYT-Zimbabwe during the 2011/2012 season under irrigated and nonirrigated environments. Although grain-filling rate and effective grain-filling duration were negatively correlated, several hybrids were distinctly above the trend line. The earliest-maturing hybrid took 127 d to reach physiological maturity and produced grain yields comparable to those of the medium-maturing genotypes (7 t ha−1). It had a high grain-filling rate of 2.40 g per plant d−1 (18% higher than those of the low-yielding hybrids) and a relatively longer effective grain-filling duration. Grain-filling rate and effective grain-filling duration had high coefficients of genetic determination, positive correlations with grain yield, low error terms, and low genotype × environment interactions, making them appropriate selection traits for improved grain yield. The study shows that it is possible to develop high-yielding early- to medium-maturing maize hybrids based on favorable combining ability values for grain-filling rate and duration.","2013","published",,"Crop Science","53",,"Crop Science Society of America",,"2295-2303",,,,,,,,,,,"TRUE",,"0011-183X",,,,,,"","http://dx.doi.org/10.2135/cropsci2013.01.0032","http://scholar.google.co.in/scholar?as_q=%22Exploiting+Grain-Filling+Rate+and+Effective+Grain-Filling+Duration+to+Improve+Grain+Yield+of+Early-Maturing+Maize%22&as_epq=&as_oq=&as_eq=&as_occt=title&as_sauthors=&as_publication=&as_ylo=&as_yhi=&btnG=&hl=en&a","pub",,"Regional Universities Forum for Capacity Building in Agriculture (RUFORUM), (CIMMYT)","",,,,,,"",,,,,,,"",,,,,"",,,,,"","",,,,,"","",,,,,
"7421",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Setimela","P","","",,,,,,,,,,,,,,,,,,,,,,,"CIMMYT(Harare)","Uganda",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"International Foundation for Science (IFS)",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"7421",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Edema","R","","",,,,,,,,,,,,,,,,,,,,,,,"Makerere University(Kampala)",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"7421",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Gibson","P T","","",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"7421",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Okori","P","","",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"7421",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Tarekegne","A","","",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,