Line x tester analysis for deducing heterosis in rice (Oryza sativa L.)

Modunshim Maring K, M. –, Patel Pb
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Abstract

An experiment consisting of twelve genotypes (four lines and eight testers) along with their thirty-two crosseswas conducted in Line x Tester design to study the heterobeltiosis and standard heterosis for grain yieldper plant and its component traits in rice at Main Rice Research Centre, Navsari. The result indicated that significant heterosis in a desirable direction was observed in all the characters except days to 50% flowering where none of the crosses showed significant heterobeltiosis in a negative direction for this trait. The best heterobeltiosis and standard heterosis for grain yield per plant was exhibited by the cross NVSR-453 x NVSR-475 followed by Gurjari x NAUR-1 and NVSR-453 x NVSR-409
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推断水稻杂种优势的x系试验分析
采用x系试验设计,利用12个基因型(4个系、8个测试体)及其32个杂交组合,研究了水稻产量植株的杂种优势和标准杂种优势及其组成性状。结果表明,除开花至50%时,所有性状均表现出显著的负向杂种优势外,其余性状均表现出显著的负向杂种优势。单株产量的最佳杂种优势和标准杂种优势表现为NVSR-453 × NVSR-475,其次是Gurjari × nur -1和NVSR-453 × NVSR-409
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