籼稻紫叶种质hrd1的鉴定及杂种优势分析

Characterization and Hybrid Heterosis Evaluation of a Novel Purple Indica Rice Germplasm hrd1

籼稻紫叶材料hrd1来源于特籼占13与02428杂交后代。农艺性状考察表明,籼稻紫叶种质hrd1紫色性状表现稳定、叶绿素含量正常,其株高较矮、分蘖中强、柱头双外露率极高,农艺性状较优良。以hrd1为母本与11个水稻品种配制杂交组合,对杂种F1及亲本的主要农艺性状进行统计分析,结果表明:hrd1与11个品种杂交F1在主要农艺、经济性状上都表现了较强的杂种优势,特别是单株穗重杂种优势表现突出。该种质在标记性状转育和杂种优势利用中具有一定价值。

hrd1, the object of this study, is a rice germplasm with purple leaf which originated from the hybrids of two green leaf accessions Texianzhan 13 and 02428. We achieved characterization of major phenotypic features for hrd1 through field and laboratory investigation, The hrd1 shows short to moderate stature, medium to high tillering numbers and extremely high double-stigma exsertion rate; Meanwhile, its purple phenotype is very stable while the chlorophyllcontent is normal. By made hrd1 crossing to eleven rice lines, mean heterosis of major agronomic characters were studied via determining performances of these F1 hybrids along with the crossing parents. All the eleven hrd1 derivative F1 hybrids displayed green appearances, and performed good heterosis in major agronomic and economic characters, especially the outstanding performance of the panicle weight per plant trait. The novel germplasm hrd1 shows definitive value in converting the purple leaf character into phenotypic marker and heterosis utilization.