水稻大穗突变体hry1的鉴定与基因定位

doi:10.16288/j.yczz.25-084

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Hereditas(Beijing) ›› 2025, Vol. 47 ›› Issue (7): 797-812.doi: 10.16288/j.yczz.25-084

• Research Article • Previous Articles Next Articles

Identification and gene mapping of hry1 mutant in rice

Jiadan Chen¹(), Tao Lin², Wan Wang³, Cheng Jin⁴, Jianru Zuo³^,⁵, Jinqiang Nian³()

1. College of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
2. College of Horticulture, China Agricultural University, Beijing 100193, China
3. Key Laboratory of Seed Innovation, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
4. School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China
5. Hainan Seed Laboratory, Sanya 572025, China

Received:2025-03-26 Revised:2025-04-05 Online:2025-07-20 Published:2025-04-24
Contact: Jinqiang Nian E-mail:chenjiadan2022@163.com;jinqiang-nian@genetics.ac.cn
Supported by:
Outstanding Talent Team Project from Hainan Province

Abstract

Abstract:

The number of tillers, the number of grains per panicle and the weight of grains, which are interrelated, mutually restricted and mutually compensated. In addition, they mainly determine the grain yield per plant in rice; especially panicle number and grain number per panicle have a large negative correlation, so high yield can be obtained only in the case of coordinated development of all factors. Nevertheless, many of the modes that regulate rice grain number and grain size remain unexplained and require further study, owing to the complex regulatory modes within and among the pathways. In this study, two mutants of grain number have been identified in the background of KY131 (Kongyu131, an excellent japonica rice variety in Northeast of China) by EMS mutagens, named as hry1-1 (height, reduced tiller, yield 1-1) and hry1-2. Compared with the wild type, the hry1-1 and hry1-2 mutants have excellent agronomic traits, including the plant height, yield per plant, panicle length, number of grains per spike, grain length, grain width and grain thickness, while significantly decreased the number of tillers. Genetic analysis showed that hry1-1 and hry1-2 were allelic mutants or the same mutant, and the mutation in a recessive nuclear gene caused their phenotypes. The results of MutMap analysis based on resequencing and map cloning showed that the HRY1 was located in the 576 kb physical interval between M33 and M28 markers on chromosome 1 in rice. Cytological analysis of young panicle and glume epidermis in hry1 mutants indicated that hry1 mutant have higher cell division frequency and cell size during differentiation of young panicle. In addition, the hry1 mutants have significantly higher the expression levels of cyclin-related genes CycAs, CycBs, CycDs and CDKs than wild type, suggesting that HRY1 may be involved in panicle development and yield formation by regulating cell division in rice. In summary, HRY1 gene plays an important role in the regulation of the differentiation and development of panicle, which will provide a new idea for molecular design breeding to improve high and stable yield in rice.

Key words: rice, number of grains per panicle, yield, cell cycle

Jiadan Chen, Tao Lin, Wan Wang, Cheng Jin, Jianru Zuo, Jinqiang Nian. Identification and gene mapping of hry1 mutant in rice[J]. Hereditas(Beijing), 2025, 47(7): 797-812.

Figures/Tables 14

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引物名称	引物序列(5′→3′)
M6	F：TAAACTGCATGCGACAAGAT R：TACAATAGCACGCAAAAGGA
M10	F：CCCACTACTTGCTTTGATCT R：CCATAAGCTACTGTGAACGA
M24	F：GACGAGGACTCCTATCTAGT R：AAATTGCTAGCACCAACTCT
M27	F：GATGGCCATAAAGCGTAACT R：TAAAGGGCAGGTATCGAATG
M28	F：AGAAACAGTACGGTTGGTTT R：TGGCAACAGATCGTCATAAT
M29	F：TTCTGCATAGACATCCCCTA R：TAAAAATCTCGAGGGTGAGC
M33	F：ATCAATCCGCGATTACCTTT R：GTATTCGTGGGCTATTCACT
M39	F：GTTCCGCATGCAAGACAT R：GGCTTACGGTCCAATAAGAA
M85	F：GGGCAGAGAATTACTTTAAC R：TGAAGGAGATGAATCGAAGC

基因名称	引物序列(5'→3')	基因名称	引物序列(5'→3')
GW2	F：CAgCAgCgCATTCCCAgTTTTC	IPA1	F：GGATATGGTGCCAACACATACAG
GW2	R：GTGGTCAGCCGAGCACTCTC	IPA1	R：GACATGGCTGCAGCCTGGTTGTG
GS3	F：CATCGGAGAAGCGAAGTCAT	CycA1;1	F：GTTTCGGTTGACGAGACGATGT
GS3	R：TTGAGGTTGAAGGAGGAGGA	CycA1;1	R：CGCTGCAAGGAACCTAGAACTG
GS5	F：CATTCCATGCAAATGCCAGTGGAC	CycA2;1	F：AATATTGAGCGAAACAGGGACAG
GS5	R：CAGCCCTGCTTTGATGAGCTTG	CycA2;1	R：AGGAAGCACACATTTGAGGATTT
GW8	F：AGGAGTTTGATGAGGCCAAG	CycA3;2	F：AGGTTGTCAAGATGGAGAGCGA
GW8	R：GCGTGTAGTATGGGCTCTCC	CycA3;2	R：CGCTTTTTGTCTTCCTGGCA
GL3.1	F：TCACAACTCCCAGGATAGG	CycB1;1	F：CACTCTCAAGCACCACACTGGA
GL3.1	R：TTTGTCTCGCTCGCTCAT	CycB1;1	R：ACAACCCTCAGCTTGCTCTCAG
GS3.1	F：ATCTCGATGCTGTTCCTTGGC	CycB2;2	F：CTCAAGGCTGCACAATCTGACA
GS3.1	R：AGATGGGCTCCATCCCGAG	CycB2;2	R：GCATTGACGGCTGGAATTTG
GGC2	F：GTGCAACTGCTTGTTATGCC	CycD2;1	F：GATTGGAGTGTTCTTGGAGGAAA
GGC2	R：GCTCGGTCTACAGCACGAT	CycD2;1	R：TGTTGCATCCAAGATTCGTCAT
TAW1	F：FGCTGGAGAAGACGAAGAAAGATAG	CycD4;2	F：TGGTAGAAGAAGACATCGCAGAG
TAW1	R：CATTCCCCCTCCTCCTCC	CycD4;2	R：TCTCCTGGTGCTTGCAGGTT
LAX1	F：CAAGAGGCGGTGGGCTAC	CycU4;3	F：GCCTCCTCATCACATCCGTC
LAX1	R：ACCGTGGACATTGCACACC	CycU4;3	R：GCCAAAGAGGAAGTCCACCTC
DEP1	F：GTGTGGAGATGGGGGAGGAG	CDKD	F：GGTCCTGGGAGAGGGAACC
DEP1	R：AGCTCATCCTTGAGGAACGTGA	CDKD	R：TTAATTTCCCTCAATGCAGTGAA
MOC1	F：GCTCGCCCTCCCTATTAAAC	CDKE	F：TACGCCGAGCACGATCTCTA
MOC1	R：CACCACCAGAGCTACTACAAC	CDKE	R：GGAGATAGTTGAGACCATTGAGCA
OsRR1	F：CTTCGCTGGAGTTGCCAT	UBQ	F：ACCCTGGCTGACTACAACATC
OsRR1	R：TCAAGCACACCACAGGTT	UBQ	R：AGTTGACAGCCCTAGGGTG
OsCKX2	F：TGTCCCTTCTACAATGGTGC
OsCKX2	R：CATCCTGACCTGCTCTTGCT

杂交组合	回交F₁和F₂的表型以及数量				χ²(1︰3)	P
	F₁世代		F₂世代
	突变体(hry1)	野生型(WT)	突变体(hry1)	野生型(WT)
♀: hry1-1×♂: WT	0	11	54	175	0.0964	0.756
♀: hry1-2×♂: WT	0	15	81	256	0.0505	0.822

Identification and gene mapping of hry1 mutant in rice

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