scholarly journals DEGENERATED PANICLE AND PARTIAL STERILITY 1 ( DPS 1 ) encodes a cystathionine β ‐ synthase domain containing protein required for anther cuticle and panicle development in rice

2019 ◽  
Vol 225 (1) ◽  
pp. 356-375 ◽  
Author(s):  
Syed Adeel Zafar ◽  
Suyash B. Patil ◽  
Muhammad Uzair ◽  
Jingjing Fang ◽  
Jinfeng Zhao ◽  
...  
Keyword(s):  
Panicle Development ◽  
Anther Cuticle ◽  
Partial Sterility

Cytological Observation of Partial Sterility of Nucleic Male Sterile Line ms86-1 in Sesame (Sesamum indicum)

2014 ◽  
Vol 49 (1) ◽  
pp. 87 ◽  
Author(s):  
Guo Wei ◽  
Miao Hongmei ◽  
Zhang Tide ◽  
Wei Libin ◽  
Li Chun ◽  
...  
Keyword(s):  
Sesamum Indicum ◽  
Cytological Observation ◽  
Male Sterile ◽  
Male Sterile Line ◽  
Partial Sterility

scholarly journals A quantitative staging system for describing rice panicle development and its application for a crop phenological model

2021 ◽  
Author(s):  
Erina Fushimi ◽  
Hiroe Yoshida ◽  
Shiori Yabe ◽  
Hiroki Ikawa ◽  
Hiroshi Nakagawa
Keyword(s):  
Staging System ◽  
Phenological Model ◽  
Panicle Development

scholarly journals The mac1 Gene: Controlling the Commitment to the Meiotic Pathway in Maize

Genetics ◽  
1996 ◽  
Vol 142 (3) ◽  
pp. 1009-1020 ◽  
Author(s):  
William F Sheridan ◽  
Nadezhda A Avalkina ◽  
Ivan I Shamrov ◽  
Tatyana B Batyea ◽  
Inna N Golubovskaya
Keyword(s):  
Female Gametophyte ◽  
Embryo Sac ◽  
Flowering Plants ◽  
Normal Female ◽  
Ovule Development ◽  
Partial Sterility ◽  
Embryo Sac Formation ◽  
Female Gametophyte Development ◽  
Normal Meiosis ◽  
Pleiotropic Mutation

Abstract The switch from the vegetative to the reproductive pathway of development in flowering plants requires the commitment of the subepidermal cells of the ovules and anthers to enter the meiotic pathway. These cells, the hypodermal cells, either directly or indirectly form the archesporial cells that, in turn, differentiate into the megasporocytes and microsporocytes. We have isolated a recessive pleiotropic mutation that we have termed multiple archesporial cells1 (macl) and located it to the short arm of chromosome 10. Its cytological phenotype suggests that this locus plays an important role in the switch of the hypodermal cells from the vegetative to the meiotic (sporogenous) pathway in maize ovules. During normal ovule development in maize, only a single hypodermal cell develops into an archesporial cell and this differentiates into the single megasporocyte. In macl mutant ovules several hypodermal cells develop into archesporial cells, and the resulting megasporocytes undergo a normal meiosis. More than one megaspore survives in the tetrad and more than one embryo sac is formed in each ovule. Ears on mutant plants show partial sterility resulting from abnormalities in megaspore differentiation and embryo sac formation. The sporophytic expression of this gene is therefore also important for normal female gametophyte development.

Panicle Development

2013 ◽  
pp. 279-295 ◽  
Author(s):  
Dabing Zhang ◽  
Zheng Yuan ◽  
Gynheung An ◽  
Ludovico Dreni ◽  
Jianping Hu ◽  
...  
Keyword(s):  
Panicle Development

scholarly journals GENES AFFECTING PRODUCTIVITY IN NATURAL POPULATIONS OF DROSOPHILA MELANOGASTER

Genetics ◽  
1975 ◽  
Vol 80 (4) ◽  
pp. 807-819
Author(s):  
Takao K Watanabe ◽  
Seido Ohnishi
Keyword(s):  
Drosophila Melanogaster ◽  
Japanese Population ◽  
Natural Populations ◽  
Regression Coefficients ◽  
Average Productivity ◽  
Partial Sterility

ABSTRACT Two hundred second chromosomes were extracted from a Japanese population in October of 1972, and the viabilities and productivities of homozygotes and heterozygotes from them were examined. Viability was measured by the Cy method and productivity by the number of progeny produced per female. The frequency of lethal-carrying chromosomes was 0.315. When the average heterozygote viability was standardized as 1.000, the average homozygote viability was 0.595 including the lethal lines, and 0.866 excluding them. The frequency of recessive sterile chromosomes among 131 non-lethal lines was 0.092 in females and 0.183 in males. There were two instances in which homozygosis for the second chromosome caused sterility in both sexes, which was close to the number expected (2.2) on a random basis of 0.092 × 0.183 × 131. When the average heterozygote productivity of 200 lines was standardized as 1.000, the average homozygote productivity was 0.532 including female steriles, and 0.584 excluding them. The ratio of detrimental load to lethal load was 0.383, while the ratio of partial sterility load to complete sterility load was 5.767. The average viability of lethal heterozygotes was slightly, but not significantly, lower than that of lethal-free heterozygotes, while the average productivity of lethal heterozygotes was significantly lower than that of lethal-free heterozygotes. There was a significant association of sterility in either sex with low viability of homozygotes. However, no statistically significant differences in viability and productivity were detected between sterile heterozygotes and non-sterile heterozygotes. The heterozygous effects of viability and productivity polygenes were examined by regressions of the heterozygotes on the sum of corresponding homozygotes. The regression coefficients were slightly positive for both viability and productivity if lethal and sterile chromosomes were excluded. The correlation between viability and productivity in homozygotes was significantly positive when sterile chromosomes were included, but the significance disappeared when the sterile chromosomes were excluded. In the heterozygotes there were no detectable correlations between them.

Mutation of OsCAX1a Results in Panicle Degeneration in Rice

2021 ◽  
Author(s):  
Quan Gan ◽  
Fengshun Song ◽  
Cuixiang Lin ◽  
Dahu Ni
Keyword(s):  
Protein Sequence ◽  
Essential Role ◽  
Cereal Crops ◽  
View Point ◽  
Mutation Site ◽  
Protein Sequence Alignment ◽  
Qrt Pcr ◽  
Panicle Development ◽  
Motif Identification ◽  
First Time

Abstract Background: Rice is one of the most common cereal crops in China. Increasing the yield of rice has always been a primary purpose of rice breeding. However, panicle degeneration in rice, a complex characteristic regulated by many genes and commonly encountered in rice production, seriously reduces the yield. Findings: In this study, we obtained a new apical panicle degeneration mutant named ym48, which exhibits a serious degeneration rate and reduced grain yield in rice. After fine mapping, the OsCAX1a gene responsible for Ca2+ selection and transportation was identified. In the ym48 mutant of the OsCAX1a gene, a A to G substitution was noted at the 190th nucleotide, and the corresponding 64th amino acid was changed from threonine to alanine. Also, the tolerance from Ca2+ stress was damaged due to the mutation. Phylogenetics, protein sequence alignment and motif identification of CAX family members in Arabidopsis and rice indicated that this mutation site was highly conserved and might play an essential role in Ca2+ transportation. Moreover, the OsCAX1a expression pattern was analyzed in rice. qRT-PCR and GUS (β-glucuronidase) staining experiments showed that OsCAX1a was highly expressed in roots, stems and panicles and that its expression increased with panicle development. Conclusions: These results demonstrated that OsCAX1a played an essential role in the regulation of panicle development for the first time and mutation of OsCAX1a would generate the panicle degeneration in rice. This study provided a new view point to explore the mechanism of panicle development and degeneration in rice.

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