第三次湖南省水稻普查收集种质资源鉴定评价

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Abstract：The main agronomic traitsand disease resistance of 225 rice germplasmresourcescollected during 'The Third General Survey and Collection Action of Crop Germplasm Resources in Hunan Province' project（hereinafter refered toas‘Hunan Province Third Census’）were identified and evaluated.This collection predominantly comprised indica subspecies accounting for 94.2% ，and exhibited nearly equal proportions of sticky rice（ 53.8% ）andwaxy rice（ 46.2% ）accessions.The remarkable diversity on seed color， including white，black，red，purple，greenandbrown，with41accessions exhibiting pigmentedrice traits，were observed.Their genetic variations are abundant，with coefficients of variation ranging from 6.47% to 52.54% Mostaccessions showed favorableagronomic characteristics，including lodging resistance，moderate stem angle，erect flag leaf，yellow glume tip，yellow glume color，awnlessand medium-long grainshape.Fourteen accessions were identified with optimal growth duration ranging from 110 to 130days ，suitable plant height （110 to 140cm ），high seed setting rate（ 590% ），strong disease resistance （medium resistance or higher）， large panicle size（ ⩾200 grains per panicle），and favorable1ooo-grainweight（ （⩾30g） ）.Meanwhile，13and 20 accessions showing waxy and pigmentedcoloration，respectively，were identified.These germplasm resources serve as raw materials supporting the academic research and breeding for new varieties in rice.

Key words： Hunan;rice;germplasm resources;identification and evaluation;special germplasm

水稻是我国三大粮食作物之一，全国一半以上人口以稻米为主食。（剩余14206字）