Open AccessImprovement ability of male parent by gibberellic acid application to enhancing the outcrossing of cytoplasmic male sterility rice lines
Author(s) -
Hassan HAMAD,
Elsayed GEWAILY,
Adel GHONEIM,
Mohamed SHEHAB,
Neama EL-KHOLLY
Publication year - 2021
Publication title -
acta agriculturae slovenica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.217
H-Index - 17
eISSN - 1854-1941
pISSN - 1581-9175
DOI - 10.14720/aas.2021.117.1.2114
Subject(s) - panicle , gibberellic acid , outcrossing , biology , sterility , tiller (botany) , horticulture , cytoplasmic male sterility , grain yield , pollen , botany , zoology , germination
The study quantified the effect of gibberellic acid (GA 3 ) as a pre-flowering treatment for male parent Giza 178 R and the influence of male to female ratio (2R:10A, 2R:12A, 2R:14A and 2R:16A) between male (R) to female (A) for two Cytoplasmic Male Sterility (CMS) lines (‘IR69625’ and ‘G46’) on hybrid rice seed production. The main plots were occupied by CMS lines while; GA3 application for male parent Giza 178R were arranged in the sub plots and male to female ratio was arranged in the sub-sub plots. The results indicated that, the, duration of floret opening, angle of floret opening, filaments exsertion, filaments length , anther length, plant height and number of tiller hill -1 of male parent Giza 178R were significantly at 300 g GA 3 ha -1 concentration. Plant height, panicle exsertion, panicle length, flag leaf angle and 1000-grain mass of CMS were not significantly affected by the GA 3 application for male parent and male to female ratio, while, number of fertile panicles hill -1 , panicle mass, seed set, seed yield and harvest index of CMS lines were highly significantly affected. The highest seed yield (2.880 and 2.950 t ha -1 ) was obtained by CMS line IR69625A using 300 g GA 3 ha -1 of male parent Giza 178R with male to female ratio of 2R:14A during both seasons.