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The rice miR171b–SCL6-IIs module controls blast resistance,grain yield,and flowering

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The Crop Journal 2022年第1期10卷 117-127页

作者： Yan Li Ying Tong Xiaorong He Yong Zhu Tingting Li Xiaoyu Lin Wei Mao Zeeshan Ghulam Nabi Gishkori Zhixue Zhao Jiwei Zhang Yanyan Huang Mei Pu Jing Fan Jing Wang Wenming Wang State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China Sichuan Agricultural UniversityChengdu 611130SichuanChina Rice Research Institute and Key Lab for Major Crop Diseases Sichuan Agricultural UniversityChengdu 611130SichuanChina

Micro RNAs(mi RNAs)act as regulators of plant development and multiple stress *** we demonstrate that the rice mi R171 b-SCL6-IIs module regulates the balance between blast resistance,grain yield,and *** R171 b-overexpressing rice plants(OX171 b)displayed increased rice blast resistance accompanied with enhanced defense responses and late heading,whereas blocking mi R171 b expression in rice(MIM171)led to greater susceptibility to blast disease,associated with compromised defense responses and early *** overexpressing or silencing of mi R171 b significantly affected plant height and number of filled seeds per panicle(seed-setting rate),resulting in decreased grain *** R171 b targets SCL6-IIa,SCL6-IIb,and SCL6-IIc,whose expression was suppressed in OX171 b but increased in *** of SCL6-IIa,SCL6-IIb,and SCL6-IIc all displayed phenotypes like that of OX171 b,including markedly increased blast disease resistance,slightly decreased grain yield,and delayed *** of mi R171 b increased gradually in leaves during the vegetative stage but decreased gradually in panicles during the reproductive stage,whereas SCL6-IIs displayed the reverse expression ***,these results suggest that the expression of mi R171 b was time-and space-dependent during the rice growth period and regulated the balance between rice blast disease resistance,grain yield,and flowering via SCL6-IIs,and that appropriate accumulation of mi R171 b is essential for rice development.

关键词： miR171b SCL6-IIs Blast disease resistance yield trait Flowering

Relationships of Panicle Type Index with Subspecies Characteristics and yield traits in Filial Generation of Crosses between Indica and Japonica Rice

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Rice science 2010年第2期17卷 149-155页

作者： Xu Hai ZHU Chun-jie Guo Yan-hua Xu Quan MAO Ting CHEN Kai WANG Jia-yu YANG Li ZHENG Jia-kui Xu Zheng-jin Rice Research Institute Shenyang Agricultural University Shenyang 110161 China Rice and Sorghum Research Institute Sichuan Academy of Agricultural Sciences Luzhou 646100 China

Two recombinant inbred line （RIL） populations, one derived from a cross between Zhongyouzao 8 （indica） and Toyonishiki （japonica） and the other from a cross between Qishanzhan （indica） and Akihikari （japonica）, were grown in Liaoning and Sichuan Provinces, China, to study the panicle type index （PTI, the ratio of a number of node position on panicle axis where the secondary branch with the most numerous secondary branch grains is located to the number of primary branches） and its relationships with subspecies characteristics and yield traits. With continuous distribution of PTI and numerous of lines with different PTIs in the progenies, indica-japonica hybridization could be a method for breeding cultivars with ideal panicle type. PTI was significantly influenced by environments, with a significant decrease from Liaoning to Sichuan A significantly negative correlation was found between PTI and most of subspecies characteristics. PTI varied remarkably with different subspecies types. As a whole, it showed a trend of indica （H）〉indicalinous （H＇）〉japonicalinous （K＇）〉japonica （K） However, it is not appropriate to regard PTI as a parameter for subspecies classification in rice because it was recombined in the filial generations of cross between indica and japonica rice. The negative correlations were found between PTI and most of panicle characteristics, as well as yield-related traits. Based on PTI, most of lines from the two populations were middle dominant panicle type （the number of grains on the secondary branch is numerous in middle position of the panicle） and lower dominant panicle type （the number of grains on the secondary branch is numerous in lower position of the panicle and becomes less towards the top of panicle） with significant yield advantages.

关键词： rice indica-japonica hybridization panicle type index subspecies characteristics yield trait relationship

Correlation and variability analysis of yield and quality related traits in different peanut varieties across various ecological zones of China

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Oil Crop Science 2023年第4期8卷 236-242页

作者： Zhihui Wang Yue Zhang Liying Yan Yuning Chen Yanping Kang Dongxin Huai Xin Wang Kede Liu Huifang Jiang Yong Lei Boshou Liao The Key Laboratory of Biology and Genetic Improvement of Oil Crops The Ministry of Agriculture and Rural AffairsOil Crops Research Institute of Chinese Academy of Agricultural SciencesWuhan430062China National Key Laboratory of Crop Genetic Improvement National Center of Crop Molecular Breeding TechnologyNational Center of Oil Crop Improvement(Wuhan)Huazhong Agricultural UniversityWuhan430070China

Peanut cultivation in China spans various ecological zones, each with unique environmental conditions. Identifying suitable peanut varieties for these regions has been challenging due to significant phenotypic variations observed across environments. This study, based on a comprehensive analysis of 256 peanut varieties, selected nine representative varieties(Huayu23, Yuanza9102, Silihong, Wanhua2, Zhonghua6, Zhonghua16, Zhonghua21,Zhonghua215, Zhonghua24) for cultivation in five distinct ecological zones including Chengdu, Hefei, Nanjing,Shijiazhuang, and Wuhan. The yield and quality related phenotypic traits of these varieties were thoroughly assessed, revealing a complex interplay between genetic and environmental factors. Principal component analysis(PCA) effectively distinguished varieties based on yield and quality traits. Strong correlations were observed between specific traits, such as seed size and quality components. The G × E interaction was evident, as some varieties consistently performed better in certain environments. Varieties with lower coefficient of variation(CV)values exhibited stable trait expression, making them reliable choices for broad cultivation. In contrast, varieties with higher CV values displayed greater sensitivity to environmental fluctuations, potentially due to specific genetic factors. Two high oleic acid varieties, Zhonghua24 and Zhonghua215, demonstrated remarkable stability in oleic acid content across diverse environments, suggesting the presence of genetic mechanisms that buffer against environmental variations. Overall, this study underscores the importance of selecting peanut varieties based on their adaptability and performance in specific ecological zones. These findings provide valuable insights for peanut breeders and farmers, facilitating informed decisions for improved crop production and quality.

关键词： Peanut yield trait Quality trait Correlation analysis Variability analysis

Heritability of Main yield traits in Red-seed Watermelon and Their Correlation Analysis

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Agricultural Biotechnology 2023年第3期12卷 14-19页

作者： Tangjing LIU Siliang LUO Ke ZHANG Yanhong QIU Wu QIN Suping WU Horticultural Research Institute Guangxi Academy of Agricultural SciencesNanning 530007China Guangxi Engineering Technology Research Center of Watermelon and Muskmelon Nanning 530007China Baise Institute of Agricultural Sciences Baise 533612China Vegetable Research Institute Beijing Academy of Agricultural and Forestry SciencesBeijing 100097China Guangxi Eastward-coordinated Development Pilot Demonstration Area(Hezhou)Management Committee Hezhou 542813China

[Objectives]This study was conducted to provide a reliable theoretical basis for the correct formulation of breeding programs for red-seed watermelon and the effective breeding of hybrid offspring.[Methods]With local varieties and inbred lines of red-seed watermelon as test materials,the generalized heritability of fruit number per plant,single-fruit weight,single-fruit seed number,single-fruit seed weight,seed kernel weight,1000-seed weight,kernel-producing ratio,seed production ratio and seed volume were estimated by variance analysis;and the heritability,genetic variation coefficients,and correlation of the nine yield traits in 43 red-seed watermelon varieties were studied.[Results]The generalized heritability of fruit number per plant,single-fruit weight,single-fruit seed number,single-fruit seed weight,seed kernel weight,1000-seed weight,kernel-producing ratio,seed production ratio and seed volume were 12.86%,80.14%,75.96%,74.39%,48.01%,17.12%,24.97%,18.60%,and 37.07%,*** heritability of single-fruit weight,single-fruit seed number and single-fruit seed weight was higher,and early-generation individual selection could achieve a better effect on them;and 1000-seed weight and kernel-producing ratio had a higher coefficient of genetic variation,indicating a high selection potential.[Conclusions]Indirect selection could be achieved for traits such as the single-fruit seed number,single-fruit seed weight,seed kernel weight,and seed volume by selecting the single-fruit *** the process of red-seed watermelon breeding,traits with high heritability can be selected in early generations of hybrids,thus playing the role of early-generation orientation.

关键词： Red-seed watermelon yield trait Heritability Correlation