Fine Mapping and Cloning of the Grain Number Per-Panicle Gene (Gnp4) on Chromosome 4 in Rice (Oryza sativa L.)

Abstract Background Lanthanum (La) is a rare earth element that can influence plant growth and development. However, the effect of La on growth, yield formation and 2-acetyl-1-pyrroline (2-AP, a key compound responsible for the aroma of rice) biosynthesis in aromatic rice (Oryza sativa L. subsp. japonica Kato) has not been reported. Therefore, the present study investigated the effects of La on growth, photosynthesis, yield formation and 2-AP biosynthesis in aromatic rice through three experiments. Results Two pot experiments and a two-year field trial were conducted with different rates of La application (20–120 LaCl3 mg kg−1 and 12 kg ha−1 LaCl3), and treatments without La application were used as controls. The results showed that the application of LaCl3 at 80 and 100 mg kg−1 and at 12 kg ha−1 greatly increased the 2-AP content (by 6.45–43.03%) in aromatic rice seedlings and mature grains compared with the control. The La treatments also increased the chlorophyll content, net photosynthetic rate and total aboveground biomass of rice seedlings. Higher antioxidant enzyme (superoxide, peroxidase, and catalase) activity was detected in the La treatments than in the control. The La treatments also increased the grain yield, grain number per panicle and seed-setting rate of aromatic rice relative to the control. Moreover, the grain proline and γ-aminobutyric acid contents and the activity of betaine aldehyde dehydrogenase significantly decreased under the La treatment. The application of La to soil enhanced the activity of proline dehydrogenase by 20.62–56.95%. Conclusions La improved the growth, yield formation and 2-AP content of aromatic rice and enhanced 2-AP biosynthesis by increasing the conversion of proline to 2-AP and decreasing the conversion of GABald to GABA.

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Morphological Characterization and Fine Mapping of Zebra Leaf Mutant zebra1349 in Rice (Oryza sativa L.)

ACTA AGRONOMICA SINICA ◽

10.3724/sp.j.1006.2016.00957 ◽

2016 ◽

Vol 42 (7) ◽

pp. 957

Author(s):

Guo-Qiang GUO ◽

Xue-Wu SUN ◽

Ping-Yong SUN ◽

Jian-Ying YIN ◽

Qiang HE ◽

...

Keyword(s):

Oryza Sativa ◽

Fine Mapping ◽

Oryza Sativa L ◽

Morphological Characterization ◽

Leaf Mutant

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Identification and fine mapping of a thermo-sensitive chlorophyll deficient mutant in rice (Oryza sativa L.)

Planta ◽

10.1007/s00425-007-0525-z ◽

2007 ◽

Vol 226 (3) ◽

pp. 785-795 ◽

Cited By ~ 74

Author(s):

Wenzhen Liu ◽

Yaping Fu ◽

Guocheng Hu ◽

Huamin Si ◽

Li Zhu ◽

...

Keyword(s):

Oryza Sativa ◽

Fine Mapping ◽

Oryza Sativa L ◽

Deficient Mutant

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Daya Gabung Beberapa Varietas Padi (Oryza sativa L.) pada Persilangan Dialel Menggunakan Metode Griffing II

Jurnal Sains Teknologi & Lingkungan ◽

10.29303/jstl.v0i0.257 ◽

2021 ◽

pp. 84-93

Author(s):

Anak Agung Ketut Sudharmawan ◽

Baiq Erna Listiana ◽

Sofi Rianti

Keyword(s):

Oryza Sativa ◽

Plant Height ◽

Power Analysis ◽

Oryza Sativa L ◽

Panicle Length ◽

Grain Number ◽

Significant Difference ◽

Diallel Crossing ◽

High Yielding Varieties ◽

Materials Used

Diallel crossing is a method that is widely used to determine the ability to combine each individual so that it can identify the potential elders to be used in crossbreeding programs to assemble high yielding varieties. This experiment aims to determine the combining power of dialelic crosses of several varieties of rice using the Griffing II method, carried out in the experimental field of the Faculty of Agriculture, Mataram University in Nyiur Lembang Village, Narmada District, West Lombok Regency, from February to July 2019. This experiment uses the method experiments carried out in the field. The materials used in this experiment were four parents, namely IPB 3S variety, Situ Patenggang variety, Inpari 32 and G11 strain and the phenotype of the cross between the four parents. The experimental results showed that the effects of general affinity and special affinity for all observed characters (plant height, number of productive tillers, number of non-productive tillers, panicle length, number of filled grain, number of empty grain and weight of 100 grains) were significantly different, except on the effect of general affinity for the number of non-productive tillers showed no significant difference. The results of the combined power analysis of the four elders were positive, so it can be said that the four elders would get good results when crossed with a number of other genotypes.

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