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Home > Archive>Volume 24, Issue 4, 2023 >1065-1074. DOI:10.13430/j.cnki.jpgr.20221124002
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Analysis on Characteristics of Rice Varieties Certified in Hainan Province
Author:
Affiliation:

1.National Nanfan Research Institute (Sanya)， Chinese Academy of Agricultural Sciences， Sanya 572025;2.China National Rice Research Institute， Hangzhou 310006;3.Seed Station of Hainan Province， Haikou 571100;4.Hainan Yazhou Bay Seed Lab， Sanya 572025;5.College of Agriculture， South China Agricultural University， Guangzhou 510642

Fund Project:

Foundation projects： Nanfan Special Project， CAAS （YBXM06）； The Project of Sanya Yazhou Bay Science and Technology City （SCKJ-JYRC-2022-87）； Hainan Province Science and Technology Special Fund （ZDYF2023XDNY086）； The Project of Hainan Yazhou Bay Seed Laboratory （B21HJ0218）

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    Abstract:

    Rice is one of the most important food crops in Hainan province， China. However， Hainan has a small cultivated area and low total rice yield， which results in great pressure of food self-sufficiency. Breeding elite rice varieties and improving rice yield are important to ensure food security. Based on the panel data of rice varieties that are officially approved in Hainan province from 2003 to 2021， the datasets at fourteen traits including rice yield， disease resistance and rice quality were analyzed. Out of 384 rice varieties that were approved in Hainan province in the past 19 years， hybrid rice varieties accounted for approximately 71.3%. The yield production of the varieties in regional trials and production trials in Hainan was relatively low. In terms of specific traits， these varieties were mainly with 110-160 grains per panicle， which might be characteristic due to local climate. A large proportion of the varieties were susceptible to blast or bacterial blight， while less than 0.5% varieties are simultaneously resistant to both diseases. The amylose content of the varieties was relatively high， but a slowly decreasing trend was observed in the varieties approved in recent years. Only about 24% of the rice varieties reached the third grade （or above） of the indica rice quality， implying an overall poor quality. Therefore， breeding for new elite rice varieties via germplasm innovation to improve the yield， pathogenic resistance and quality is required in Hainan province. In addition， improving industrial rice production in Hainan province might benefit from actions such as revising registration standard for rice variety， strengthening researches on rice cultivation and extension of elite rice varieties.

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History
  • Received:November 24,2022
  • Revised:February 01,2023
  • Online: June 13,2023
  • Published: June 14,2023
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