优质抗旱恢复系绿旱639的选育与利用

任群; 方吴云; 傅先来; 龚存力; 朱倩; 刘梦阳; 王启明; 任兰天; 王士梅

优质抗旱恢复系绿旱639的选育与利用

New High-quality, Drought-resistant Restorer Rice Line, Lvhan 639

摘要

摘要:
目的选育优质抗旱恢复系，为培育优质抗旱杂交稻新品种提供优异的种质资源。
方法以‘黄华占’为母本、‘绿旱 1 号’为父本进行杂交，获得 F₁后与母本黄华占回交得到 BC₁F₁；随后在安徽（合肥、蚌埠）和海南陵水两地来回育种，对 BC₁F₁至 BC₁F₅各世代依次实施水分胁迫、分子标记检测、株型与农艺性状选择、产量及抗旱性鉴定等筛选，结合多点重复鉴定与丰产性评价，定向选育目标株系。
结果 2016年正季小区重复鉴定，其中编号为DJ639的株系耐旱性、品质及产量协同较好，表现突出，命名为‘绿旱639’。绿旱639具有品质优、抗旱性好、产量高、配合力强、抗病性好等优良性状。该系于2021年通过安徽省农作物品种委员会审定，2023年取得植物新品种权（CNA20191000485），利用其配组的两个组合‘绿旱两优21’、‘皖旱两优25’均于2022年通过安徽省农作物品种审定委员会审定。
结论绿旱639具有品质优、耐旱性好、产量高、配合力强、抗病性好等优良性状。既可以作为抗旱优质米进行开发利用，又可以作为抗旱恢复系用于优质耐旱杂交稻的配组利用。

Abstract:
Objective A high-quality, drought-resistant restorer rice line was bred.
Method Huanghuazhan as female parent and Lvhan No. 1 as male parent were used for the hybridization. The F₁ hybrid was backcrossed with Huanghuazhan to obtain BC₁F₁ followed by repeated backcrossing held in Hefei and Bengbu, Anhui as well as Lingshui, Hainan. From BC₁F₁ to BC₁F₅ generations, water stress test, molecular marker detection, phenotypic and agronomic traits selection, yield evaluation, and drought resistance determination were performed to scrutinizingly screen the candidates to arrive at a finalized select breed.
Result In 2016, the selected DJ639 was officially named Lvhan 639 for its outstanding drought tolerance, grain quality, and yield. In 2021, it was approved by Anhui Provincial Crop Variety Approval Committee with the designated new plant variety certificate of CNA20191000485 granted in 2023. In addition, the two combinations of the new line, Lvhanliangyou 21 and Wanhanliangyou 25, were also approved by the same committee in 2022.
Conclusion The newly bred Lvhan 639 of high quality, drought and disease resistance, yield, and combining ability was considered amply suitable for extended cultivation.

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