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Hybrid breeding and cultivar diversity in rice production in China

Hybrid breeding and cultivar diversity in rice production in China This study determined the effect of hybrid breeding on cultivar diversity in rice (Oryza sativa L.) production in China. The results showed that hybrid breeding led to increases in the Shannon index of cultivar diversity by 29–184% during the period 2011–2015 compared with the period 1986–1990 for 10 major hybrid rice‐producing provinces in China. There was a significant exponential relationship between the Shannon index of cultivar diversity and the number of hybrid cultivars and the total number of cultivars across the 10 provinces and the two 5‐yr periods. The results of this study also demonstrate that hybrid rice breeding resulted in a cultivar diversity that came close to saturation in some provinces, such as Anhui, Hunan, Jiangxi, and Sichuan, and highlight the urgent need for a reconsideration of the development of hybrid rice industrialization in China to avoid wasting resources caused by overbreeding. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Agricultural & Environmental Letters Wiley

Hybrid breeding and cultivar diversity in rice production in China

Agricultural & Environmental Letters , Volume 7 (1) – Jan 1, 2022
4 pages

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References (11)

Publisher
Wiley
Copyright
© 2022 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.
eISSN
2471-9625
DOI
10.1002/ael2.20074
Publisher site
See Article on Publisher Site

Abstract

This study determined the effect of hybrid breeding on cultivar diversity in rice (Oryza sativa L.) production in China. The results showed that hybrid breeding led to increases in the Shannon index of cultivar diversity by 29–184% during the period 2011–2015 compared with the period 1986–1990 for 10 major hybrid rice‐producing provinces in China. There was a significant exponential relationship between the Shannon index of cultivar diversity and the number of hybrid cultivars and the total number of cultivars across the 10 provinces and the two 5‐yr periods. The results of this study also demonstrate that hybrid rice breeding resulted in a cultivar diversity that came close to saturation in some provinces, such as Anhui, Hunan, Jiangxi, and Sichuan, and highlight the urgent need for a reconsideration of the development of hybrid rice industrialization in China to avoid wasting resources caused by overbreeding.

Journal

Agricultural & Environmental LettersWiley

Published: Jan 1, 2022

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