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Biometrical studies on genetic variability and diversity in upland rice (Oryza sativa L.)

机译:旱稻遗传变异性和多样性的生物学研究(Oryza Sativa L.)

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摘要

The study was conducted with thirty seven advanced rice cultures during Rabi 2016-17 under upland rice ecosystem. The analysis of variance revealed that all the treatments were significant for various characters viz., days to 50% flowering, plant height, number of productive tillers per plant, number of panicles/m2, panicle length, number of filled grains per panicle, grain yield/ha, straw yield/ha and harvest index. The higher magnitude of PCV and GCV were recorded for number of panicles /m2, grain yield/ha and straw yield/ha. High heritability coupled with high genetic advance was recorded for number of panicles/m2 which indicated the major role of additive gene action in the inheritance of this trait. Based on the D2 analysis, the genotypes were grouped into eight clusters. Maximum number of genotypes (21 genotypes) was grouped in cluster I. Maximum inter cluster distance was observed between cluster III and VIII (7.75) followed by between cluster III and VI (7.11) indicating wider genetic diversity between genotypes. The intra cluster distance was maximum in cluster I (4.07) followed by cluster II (3.88) indicates hybridization involving genotypes within the same clusters may result in good cross combinations. Among the nine traits studied, number of panicles/m2 has contributed maximum divergence (22.22%) followed by panicle length (17.12%), plant height (14.41%), filled grains per panicle (11.26%) and days to fifty per cent flowering (10.96%). Hence these altogether contribute more than seventy five per cent towards total divergence. Therefore these characters may be given importance during selection programme in upland rice ecosystem.
机译:该研究在高于旱稻生态系统下的Rabi 2016-17期间进行了三十七种高级稻草。方差分析表明,所有治疗都对于各种角色Qiz具有重要意义。,每天到50%开花,植物身高,每植物的生产耕作数,胰腺数量/ m2,穗长,填充颗粒的圆锥数,每穗填充的颗粒数产量/公顷,秸秆产量/公顷和收获指数。记录较高的PCV和GCV的圆锥片/ M2,谷物产量/ HA和秸秆产量/公顷。对于高遗传提前的高遗传性被记录为碱/ M2的数量,这表明添加剂基因作用在这种特征的遗传中的主要作用。基于D2分析,将基因型分为八簇。在簇I中分组最大基因型(21个基因型)。在簇III和VIII(7.75)之间观察到最大群体距离,然后在群体III和VI(7.11)之间表明基因型之间的更广泛的遗传多样性。在簇I(4.07)中,簇中距离的簇距离最大(3.88)表明涉及相同群集内的基因型的杂交可能导致良好的交叉组合。在研究的九个特征中,胰腺的数量/ m2具有贡献的最大分歧(22.22%),然后是穗长(17.12%),植物高度(14.41%),每穗填充颗粒(11.26%)和日落到50% (10.96%)。因此,这些完全达到了超过七十五%的差异。因此,这些角色可能在普通米生态系统中的选择程序期间给出重要性。

著录项

  • 作者

    S. Muthuramu; S. Sakthivel;

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  • 年度 2018
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  • 原文格式 PDF
  • 正文语种 eng
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