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Mining Applicable Elite Alleles of growth duration, Plant Height and Panicle Number per Plant by Conditional QTL Mapping in Japonica Rice

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Rice science 2011年第3期18卷 196-203页

作者： Jian-hua JIANG[a] Qi-bing ZHAO[b] Qiang-ming LIU[a] Lan CHEN[a] Fu-long CHEN[b] Bao-jian QIAO[b] De-lin HONG[a] [a]State Key Laboratory of Crop Genetics and Germplasm Enhancement Nanjing Agricultural University Nanjing 210095 China [b]Fengshou Seed Corporation Limited Plantation of Sihong County of Jiangsu Province Sihong 223905 China

Unconditional and conditional QTL mapping were conducted for growth duration (GD), plant height (PH) and effective panicle number per plant (PN) using a recombinant inbred line (RIL) population derived from a cross between two japonica rice varieties Xiushui 79 and C Bao. The RIL population consisted of 254 lines was planted in two environments, Nanjing and Sihong, Jiangsu Province, China. Results showed that additive effects were major in all of QTLs for GD, PH and PN detected by the two methods, and the epistatic effects explained a small proportion of phenotypic variation. No interactions were detected between additive QTL and environment, and between epistatic QTL pairs and environment. After growth duration was adjusted to an identical level, RM80-160bp was detected as an applicable elite allele for PN, with an additive effect of 0.71. When effective panicle number per plant was adjusted to an identical level, RM448-240bp was detected as an applicable elite allele for GD, with an additive effect of 4.64. After plant height was adjusted to an identical level, RM80-160bp was detected as an applicable elite allele for PN, with an additive effect of 0.62, and RM448-240bp was detected as an applicable elite allele for GD, with an additive effect of 3.89. These applicable elite alleles could be used to improve target traits without influencing the other two traits.

关键词： japonica rice growth duration plant height effective panicle number per plant unconditional QTL mapping conditional QTL mapping recombinant inbred line

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Mining Elite Alleles of growth duration and Productive Panicle Number per Plant by Association Mapping with Conditional Phenotypic Value in Japonica Rice

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Rice science 2013年第3期20卷 200-206页

作者： JIANG Jian-hua CHEN Lan LIU Qiang-ming HE Ying-jun HONG De-lin State Key Laboratory of Crop Genetics and Germplasm Enhancement Nanjing Agricultural University Institute of Crops Anhui Academy of Agriculture Sciences

To provide genetic information and materials for breeding hybrid japonica rice with wide adaptability and strong competitive advantage of yield, elite alleles and their carrier varieties of growth duration （GD） and productive panicle number per plant （PN） were detected. A natural population composed of 94 japonica varieties was phenotyped for the GD, PN and plant height （PH） in two environments. The conditional phenotypic data were transferred by the linear model method in software QGAStation 1.0, and association mapping based on the unconditional and conditional phenotype values of GD and PN was analyzed by using general linear model in software TASSEL. A total of 34 simple sequence repeat （SSR） marker loci associated with GD and PN were detected in the two environments. Among them, 15 were associated with GD, and 19 were associated with PN. Four elite alleles of RM8095-120bp, RM7102-176bp, RM72-170bp and RM72-178bp were associated with GD, and their carrier varieties were Hongmangshajing, Nipponbare, Hongmangshajing and Nannongjing 62401, respectively. These elite alleles from the carrier varieties can shorten GD by 2.03-9.93 d when they were introduced into improved materials. RM72-182bp associated with PN was an elite allele, and its carrier variety was Xiaoqingzhong. It can increase PN by three when introduced into improved materials. Moreover, these elite alleles can be used to improve target traits without influencing another two traits.

关键词： japonica rice growth duration productive panicle number per plant plant height association mapping with conditional phenotypic value elite allele

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Variation in Gelatinization Characteristics of Storage Root Starch During Sweetpotato growth and Development

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Agricultural Sciences in China 2005年第6期4卷 436-442页

作者： HUANGHua-hong LUGuo-quan ZHENGYi-fan CollegeofAgricultureandBiotechnology ZhejiangUniversityHangzhou310029P.R.China ZhejiangUniversityofTechnology Hangzhou310032P.R.China ZhejiangForestryCollege Lin＇an311300P.R.China／／CollegeofAgricultureandBiotechnologyZhejiangUniversityHangzhou310029P.R.China

The differential scanning calorimetry (DSC) and rapid visco-analyzer (RVA) were used to determine the starch gelatinizationcharacteristics during the growth of three sweetpotato cultivars. The results showed that the starch contents of threesweetpotato cultivars all decreased as growth progressed. Changes of the amylose contents differing in harvesting datesshould be discriminated according to the cultivars. At the early harvests amylose contents of Xushu18 and Zheda9201were relatively high, but those of Zhe3449 were low. As the growth duration of sweetpotatoes prolonged, the peaks ofDSC thermograms tended to occur at a low temperature and not to be so obstrusive with the increased width of the *** decreases were observed, values of onset, peak and conclusion temperatures, as well as enthalpy of phasetransitions, as growth time lengthened. The peak viscosities, as determined through RVA, showed a rising tendency asgrowth progressed. In addition, statistical analysis revealed that there were correlations between the amylose content andgelatinization characteristics to some extent, which were affected by genotypes evidently.

关键词： Sweetpotato Starch gelatinization characteristics growth duration DSC RVA

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水稻不同熟期品种的碳、氮代谢研究初报

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江西农业大学学报 1988年第S2期 94-101页

作者：石庆华

稻米的主要成分是淀粉,因而关于水稻碳水化合物的研究显得尤为重要,对此,国内外已有很多文献报道(1.***.4.5.6)。一般认为,抽穗前植株积累的醣(包括可溶性糖和淀粉)大部分在抽穗后转运到穗部,其转运率依品种、施氮水平和气候条件而变化。... 详细信息

稻米的主要成分是淀粉,因而关于水稻碳水化合物的研究显得尤为重要,对此,国内外已有很多文献报道(1.***.4.5.6)。一般认为,抽穗前植株积累的醣(包括可溶性糖和淀粉)大部分在抽穗后转运到穗部,其转运率依品种、施氮水平和气候条件而变化。高产良种在高氮水平积累的醣比一般品种要高得多。鉴于近年来水稻产量徘徊不前,施氮水平日益增加,研究在高氮水平下水稻品种的碳、

关键词： growth duration Carbohydrate Sugar nitrogen

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Isolation, Identification and Earliness Effect Analysis of Rice Dominant Earliness Gene Ef-cd

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Agricultural Sciences in China 2005年第8期4卷 561-566页

作者： DENG Xiao-jian WANG Ping-rong LI Xiu-lan DONG Chun-lin YANG Zhi-rong Rice Research Institute Sichuan Agricultural University Chengdu 611130 P.R.China College of Life Sciences Sichuan University Chengdu 610064 P.R.China

Ef-cd gene is a dominant earliness gene located on the short arm of rice chromosome 3. In this paper, through continuous backcross, self-pollination and molecular marker assisted selection, individual Ef-cd gene was isolated and its nearly isogenic lines were constructed by using early-maturing indica line 6442S-7 as the donor parent, and by using latematuring indica line Minghui 63 （MH63）, Shuhui 881 （SH881） and Shuhui 527 （SH527） as the recurrent parents （genetic background）, respectively. Further, it was found out that Ef-cd gene could generally advance rice to head 11-14 d earlier. So, it was considered that Ef-cd gene played an important role in rapid developing early-maturing and super high-yielding rice varieties.

关键词： Rice growth duration Earliness Dominant earliness gene Gene effect

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Identification and Gene Mapping of Completely Dominant Earliness in Rice

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Agricultural Sciences in China 2002年第1期1卷 11-18页

作者： DENG Xiao-jian, ZHOU Kai-da, LI Ren-duan, CHUN Ze LI Ping, WANG Wen-ming, ZHAI Wen-xue and ZHU Li-huang( Rice Research Institute, Sichuan Agricultural University, Wenjiang 611130 Institute of Genetics, Chinese Academy of Sciences, Beijing 100101) Rice Research Institute Sichuan Agricultural University Wenjiang 611130 Institute of Genetics Chinese Academy of Sciences Beijing 100101 Rice Research Institute Sichuan Agricultural University Wenjiang 611130 Institute of Genetics Chinese Academy of Sciences Beijing 100101

The completely dominant earliness was identified in a genie male-sterile and early maturing indica line 6442S-7. F1 progenies from 6442S-7 crossed with thirteen various types of medium- or late-maturing varieties, shared the same heading date as 6442S-7. The segregation of heading date in the F2 and B1F1 populations showed that the earliness of 6442S-7 is mainly controlled by two dominant major genes. The local linkage map of one dominant earliness gene harbored in 6442S-7 was constructed with F2 population and four kinds of molecular marker techniques. The results showed that the gene was located between a RFLP marker C515 and a RAPD marker OPI 11.557 on the terminal region of short arm of rice chromosome 3, 10.9cM and 1.5cM from C515 and OPI11.557, respectively. The genetic distances from the target gene to two SSR markers, RM22 and RM231, and one AFLP marker, PT671, were 3.0, 6.7 and 12.4 cM, respectively. This gene, being identified and mapped first, is designated tentatively as Ef-cd(t). As a new genetic resource of completely dominant earliness, 6442S-7 has splendid future in rice improvement.

关键词： Oryza saliva L. growth duration Earliness Dominant earliness gene Gene mapping

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