El-Mowafi, H. (2006). GENETIC AND COMBINING ABILITY ANALYSIS OF GRAIN QUALITY CHARACTERS IN HYBRID RICE. Journal of Plant Production, 31(8), 4929-4946. doi: 10.21608/jpp.2006.236086
H. F. El-Mowafi. "GENETIC AND COMBINING ABILITY ANALYSIS OF GRAIN QUALITY CHARACTERS IN HYBRID RICE". Journal of Plant Production, 31, 8, 2006, 4929-4946. doi: 10.21608/jpp.2006.236086
El-Mowafi, H. (2006). 'GENETIC AND COMBINING ABILITY ANALYSIS OF GRAIN QUALITY CHARACTERS IN HYBRID RICE', Journal of Plant Production, 31(8), pp. 4929-4946. doi: 10.21608/jpp.2006.236086
El-Mowafi, H. GENETIC AND COMBINING ABILITY ANALYSIS OF GRAIN QUALITY CHARACTERS IN HYBRID RICE. Journal of Plant Production, 2006; 31(8): 4929-4946. doi: 10.21608/jpp.2006.236086
GENETIC AND COMBINING ABILITY ANALYSIS OF GRAIN QUALITY CHARACTERS IN HYBRID RICE
Rice Research and Training Center (RRTC). Sakha. Kafr El-Sheikh Egypt. 33717. Field Crops Research lnst.(FCRl). Agric. Research Center
Abstract
The present investigation was conducted to realize the feasibility of
heterosis breeding method using three lines system in rice (CMS. maintainer and
restorer lines). The experiments were carried out during 2002. 2003 and 2004
growing seasons at RRTC Farm. Sakha. Kafr El-Sheikh, Egypt. Twelve hybrids
obtained from crossing four diverse CMS lines as females with three Egyptian
restorer lines were evaluated along with the parents for genotypic variation. The
mean squares of the genotypes showed significant values for all studied grainn
quality characters at the two years and their combined data. indicating the presence
of large variations among them. The interactions of genotypes and parents with
years were insignificant for all grain quality characters with the exception of total
milled rice % (TMR %) and Head rice %(HR %) which should highly significance
mean squares. The interaction of crosses _with the years was found to be
insignificant for all characters except HR%. in the mean time. the interaction of
parents vs. crosses with the years was significant for TMR%. HR%. grain shape and
Chalkiness of endosperm (CLK) and insignificant for BRO/o, Brown rice length (BRL).
gelatinization temperature(GT) and amylose content % characters.
The analysis of variances for combining ability revealed significant
differences among CMS lines for BR%. BRL%. grain shape. CLK. GT and amylose
content %. Therefore. the testers exhibited significant differences for BRL. grain
shape and GT. The line x tester (SCA) variance exhibited significant differences at
the two years and their combined data for HR% and amylose content % and varied
for the rest of grain quality studied characters. The result .alsoindecated that the
parents . IR58025A. IREBBBSA. Giza 178 R and Giza 182 R were found to have
favorable genes for one or more characters along with grain quality. Out of 12
hybrids one hybrid for BR%. two for HR%. one for grain shape and three for low
amylose content exhibited significant desirable SCA effects in the two years and their
combined data. The superior hybrids for most grain quality characters were SK 2003
H (G. 46NGiza 178 R), SK2010 H (G. 46NGiza 182 R) and SK 2011 H (large
stigma NGiza 182 R). The estimates of genetic parameters revealed that additive
variance values and relative importance of GCA% were higher than these dominant
variance and relative important of SCA% for all grain quality studied characters
except in case of BR%.
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