volume 44 issue 1 (march 2010) : 62 - 65
HETEROSIS AND COMBINING ABILITY STUDIES FOR GRAIN YIELD AND GROWTH CHARACTERS IN MAIZE (ZEA MAYS L.)
1Centre for Plant Breeding and Genetics
Tamil Nadu Agricultural University, Coimbatore – 641 003, India.
ABSTRACT
Combining ability and heterosis for grain yield and growth characters was studied in maize through
line x tester mating design using nine lines and four testers along with check COH(M)4. Combining
ability analysis showed the predominant role of non-additive gene action for all the characters
studied. The lines UMI 199 and UMI 278 and the testers UMI 217 and UMI 314 had recorded high per
se and gca for yield and majority of the characters studied. The hybrid UMI 278 ´ UMI 217 and UMI
334 ´ UMI 217 had significant and superior per se performances for grain yield per plant. The hybrid
UMI 348 ´ UMI 330 exhibited high sca effect for plant height. Growth influencing characters positively
influenced hybrid performance in grain yield. The hybrid UMI 278 ´ UMI 217 was observed as best
and followed by UMI 334 ´ UMI 217 are potential hybrids for exploitation of yield heterosis
line x tester mating design using nine lines and four testers along with check COH(M)4. Combining
ability analysis showed the predominant role of non-additive gene action for all the characters
studied. The lines UMI 199 and UMI 278 and the testers UMI 217 and UMI 314 had recorded high per
se and gca for yield and majority of the characters studied. The hybrid UMI 278 ´ UMI 217 and UMI
334 ´ UMI 217 had significant and superior per se performances for grain yield per plant. The hybrid
UMI 348 ´ UMI 330 exhibited high sca effect for plant height. Growth influencing characters positively
influenced hybrid performance in grain yield. The hybrid UMI 278 ´ UMI 217 was observed as best
and followed by UMI 334 ´ UMI 217 are potential hybrids for exploitation of yield heterosis
KEYWORDS
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Copyright :
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Published In
Indian Journal of Agricultural Research
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