植物遗传资源学报2025，Vol.26Issue(6)：1177-1190,14.DOI:10.13430/j.cnki.jpgr.20241214001
木薯新选048自交系采后生理腐烂(PPD)抗性评价及其生理变化分析
Evaluation of Postharvest Physiological Deterioration(PPD)Resistance and Analysis of Physiological Changes in Cassava Cultivar Xinxuan 048 Inbred Lines
摘要
Abstract
Postharvest physiological deterioration(PPD)poses a significant constraint to the commercialization of cassava.In this study,we evaluated 166 germplasms from Xinxuan 048(XX048)inbred cassava line.The degree of tuber decay was assessed at 0,6,12,18,24 and 30 days postharvest,with corresponding physiological indicators measured.The results showed that X045,X126,X077,X088,and X147 browning occurred later.Notably the browning areas in the five germplasms remained below 10％(PPD Grade 1)by 30 day,indicating superior storage tolerance.In contrast,X024,X062,X085,X100,and X133 showed browning occurred earlier.After 24 days,the browning area in these germplasms exceeded 50％,and reaching 100％(PPD Grade 6)by 30 day,demonstrating their poor storage tolerance.These germplasms can serve as excellent resources for storage tolerance cassava breeding.Starch and dry matter contents are lower in storable germplasms,while β-carotene content is higher.MDA content and antioxidant enzyme(SOD,CAT,POD)activities increase significantly in the late storage phase,and greater increments in non-storable germplasms.Correlation analysis showed that the browning area was positively correlated with dry matter content,starch content and POD enzyme activity,while also showing positive associations with SOD and CAT enzyme activity as well as MDA content.Conversely,a negative correlation was observed with β-carotene content.These results suggest that cassava tubers with high dry matter content and starch content are more susceptible to postharvest decay and exhibit weak PPD resistance.This study provides valuable data for investigating the mechanisms underlying PPD resistance in cassava and supports the breeding of PPD-resistant varieties.The identified germplasms offer a foundation for further research on storage tolerance,PPD resistance mechanisms,and cassava breeding program.These findings hold significant implications for cassava cultivation and postharvest management.关键词
木薯/自交系/耐贮性/采后生理腐烂Key words
cassava/inbred line/storability/postharvest physiological deterioration(PPD)引用本文复制引用
黄珍玲,李文彬,蔡兆琴,邓清文,黄若兰,兰秀,张秀芬,郭素云,何文,莫周美,李天元,阮丽霞,韦婉羚,严华兵,王天亮,阮孟斌,何观咏,梁振华,李恒锐,杨海霞..木薯新选048自交系采后生理腐烂(PPD)抗性评价及其生理变化分析[J].植物遗传资源学报,2025,26(6):1177-1190,14.基金项目
国家重点研发计划项目(2023YFD1600601) （2023YFD1600601）
广西自然科学基金(2024GXNSFBA010406,2024GXNSFAA010006) （2024GXNSFBA010406,2024GXNSFAA010006）
广西农业科学院基本科研业务专项(桂农科2023YM27,桂农科2023YM28,桂农科2021YT157)National Key Research and Development Program Project of China(2023YFD1600601) （桂农科2023YM27,桂农科2023YM28,桂农科2021YT157）
Guangxi Natural Science Foundation(2024GXNSFBA010406,2024GXNSFAA010006) （2024GXNSFBA010406,2024GXNSFAA010006）
Guangxi Academy of Agricultural Sciences Basic Research Business Special Project(Guinongke 2023YM27,Guinongke 2023YM28,Guinongke 2021YT157) （Guinongke 2023YM27,Guinongke 2023YM28,Guinongke 2021YT157）
