Breeding of A New Cassva Cultivar ‘Yunreshu No.1’

SONG Jiming; DUAN Chunfang; LI Yuexian; XIAO Mingkun; LIU Qian; ZHANG Linhui; YAN Wei; LIU Guanghua

doi:10.11924/j.issn.1000-6850.casb2024-0600

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Chin Agric Sci Bull ›› 2025, Vol. 41 ›› Issue (14) : 25-31. DOI: 10.11924/j.issn.1000-6850.casb2024-0600

Breeding of A New Cassva Cultivar ‘Yunreshu No.1’

SONG Jiming ¹^,² ,
DUAN Chunfang ¹^,² ,
LI Yuexian ¹^,² ,
XIAO Mingkun ¹^,² ,
LIU Qian ¹^,² ,
ZHANG Linhui ¹^,² ,
YAN Wei ¹^,² ,
LIU Guanghua ³

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Abstract

This study aimed to develop a new cassava cultivar with high and stable yield, high starch content, resistance to carmine spider mites, and wide adaptability. Using the compact and high-yielding cassava cultivar 'South China 11' ('SC11') as the female parent and the high-starch, carmine spider mite-resistant cultivar 'Guire 891' ('GR891') as the male parent, a systematic breeding procedure was implemented to develop the new elite cassava cultivar 'Yunreshu No.1'. In regional and production trials, its fresh root yields reached 42.42 t/ha and 40.44 t/ha, representing yield increases of 14.09% and 16.41%, respectively, compared with the main Chinese cultivar 'South China 205' ('SC205'). The starch content of fresh roots was 26.11% (specific gravity method) and 36.02% (acid hydrolysis method), both higher than the control 'SC205'. The average mite damage indices were 23.72% and 26.01%, respectively, demonstrating mite resistance. This variety was officially certified by the National Tropical Crops Variety Approval Committee on December 25, 2023 (Approval No.: Repinshen 2023004). 'Yunreshu No.1' is a new cassava cultivar characterized by high and stable yield, high starch content, and resistance to carmine spider mites. It exhibits strong market competitiveness in major cassava-growing regions such as Yunnan, Hainan, Jiangxi, and Guangxi, and holds significant potential for enhancing cassava production, farmer income, and industrial efficiency.

Key words

cassava / 'Yunreshu No.1' / variety breeding / high yield / high starch / mite resistance

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SONG Jiming , DUAN Chunfang , LI Yuexian , et al . Breeding of A New Cassva Cultivar ‘Yunreshu No.1’[J]. Chinese Agricultural Science Bulletin. 2025, 41(14): 25-31 https://doi.org/10.11924/j.issn.1000-6850.casb2024-0600

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https://doi.org/10.3969/j.issn.1000-2561.2024.04.007

Cited in this article [1] Abstract

以木薯种质资源为对象，对其8个主要农艺性状数据进行统计学分析。结果表明：8个农艺性状数据呈正态分布，变异系数的范围为7.2%~46.9%，其中淀粉产量的变异系数达46.9%，薯干率的变异系数最小，为7.2%。相关分析结果表明，不同性状之间存在一定的显著正相关，其中单株鲜薯质量与茎径呈极显著正相关。进一步利用主成分分析方法将8个农艺性状简化为3个主成分，发现2年的累计贡献率分别达92.55%、93.67%。第一主成分是单株鲜薯质量、鲜薯产量、淀粉产量、薯干产量，第二主成分是淀粉含量和薯干率。通过聚类分析表明，在欧式距离为6.0处，可将各年份的资源分为4个类群，其中第Ⅱ类群（单株鲜薯质量、鲜薯产量、淀粉产量、薯干产量）表现优异，可优先作为高产优质木薯新品种选育的亲本材料。

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