Zhishu Jiang^#, Cong Gan^#, Yulian Liu, Xiaoli Lin, Limei Peng, Yongping Song, Xiaowei Luo, Jie Xu^*

Phyton-International Journal of Experimental Botany, Vol.92, No.3, pp. 665-677, 2023, DOI:10.32604/phyton.2023.025266

Abstract Senescence is the last developmental process in plant, which has an important impact on crop yield and quality. In this study, a stable hereditary early-senescence line BC64 was isolated from the high-generation recombinant inbred lines of 93-11 and Wuyunjing7 (W7). Genetic analysis showed that the premature aging phenotype was controlled by a dominant gene derived from 93-11. By linkage analysis, the gene was primarily mapped in the region between marker B4 and B5 near the centromere of chromosome 4, described as ES(4). Through multiple backcrossing with W7, the near-isogenic line of ES(4) (NIL-ES(4)) was obtained. Compared with wild-type W7, NIL-ES(4)… More >

Linjun Cai^1,#, Junhua Liu^2,#, Han Yun¹, Dan Du¹, Xiaolong Zhong¹, Zhenlin Yang¹, Xianchun Sang¹, Changwei Zhang^1,*

Phyton-International Journal of Experimental Botany, Vol.90, No.4, pp. 1103-1117, 2021, DOI:10.32604/phyton.2021.015532

Abstract Leaf color mutants are ideal materials for studying many plant physiological and metabolic processes such as photosynthesis, photomorphogenesis, hormone physiology and disease resistance. In this study, the genetically stable yellow-green leaf mutant ygl16 was identified from mutated “Xinong 1B”. Compared with the wild type, the pigment concentration and photosynthetic capacity of the ygl16 decreased significantly. The ultrastructural observation showed that the distribution of thylakoid lamellae was irregular in ygl16 chloroplasts, and the grana and matrix lamellae were blurred and loose in varied degrees, and the chloroplast structure was disordered, while the osmiophilic corpuscles increased. The results of the genetic analysis… More >

Gang Wei^#, Hongxia Yang^#, Jingwen Wu, Zixian Xiong, Nan Wang^*

Phyton-International Journal of Experimental Botany, Vol.90, No.3, pp. 803-813, 2021, DOI:10.32604/phyton.2021.014505

Abstract There is a positive correlation between fertility and yield, and the decrease of fertility is bound to a greatly reduced crop yield. Male sterile mutants can be used in hybrid rice. Therefore, rice male sterility has an important value in research and application, and the study of related mutants is also very vital. The mutant ms10 (male sterile 10) reported in this study was induced by ethyl methane sulfonate (EMS) in the indica maintainer line Xinong 1B. There was no significant difference between the ms10 and wild type in the vegetative growth stage. However, in the reproductive growth stage, ms10… More >

Sen Wang¹, Fei Zheng¹, Meijing Zhang¹, Jun Tu², Yanping Chen^1,3, Jianhua Yuan^1,3, Qingchang Meng^1,*

Phyton-International Journal of Experimental Botany, Vol.89, No.4, pp. 861-871, 2020, DOI:10.32604/phyton.2020.011762

Abstract Endosperm mutants are critical to the studies on both starch synthesis and metabolism and genetic improvement of starch quality in maize. In the present study, a novel maize endosperm mutant A0178 of natural variation was used as the experimental material and identified and then characterized. Through phenotypic identification, genetic analysis, main ingredients measurement and embryo rescue, development of genetic mapping population from A0178, the endosperm mutant gene was located. The results showed that the mutant exhibited extremely low germination ability as attributed to the inhibited embryo development, and amounts of sugars were accumulated in the mutant seeds and more sugars… More >

Méndez-Aguilar R¹, MH Reyes-Valdés², N Mayek-Pérez³

Phyton-International Journal of Experimental Botany, Vol.82, pp. 215-226, 2013, DOI:10.32604/phyton.2013.82.215

Abstract Common bean was originated in México, and it is the most important protein source for millions of Mexicans, mainly those with low economic incomes. Grain yield of this crop is mainly affected by several fungal, bacterial and viral diseases. Among them, there are root rot diseases caused by the genera Macrophomina and Fusarium sp. Currently, some molecular biology tools such as DNA molecular markers are being used successfully to develop genetic maps where QTLs and major molecular markers are located, which are linked to genes that confer resistance to these fungi. The importance of the development of genetic maps is… More >