combining ability and heritability of selected rice varieties for grain yield, its components and grain quality characters

所选水稻品种籽粒产量、产量构成因素及籽粒品质性状的配合力与遗传力

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ID: 230801
2015
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Abstract
This study was conducted to determine the combining ability and heritability of rice grain yield, its components and some grain quality traits such as amylose content (AC), gelatinization temperature (GT), gel consistency (GC) and head rice recovery (HRR). The study was commenced by crossing the selected rice varieties based on a full diallel mating design. The F1 was harvested at the end of the season. In the following season, the crossed, reciprocal and parental lines were planted in randomly complete block design with three replications. Analysis of variance indicated that genotypes were significantly different for all traits. The diallel analysis by Griffing`s method showed highly significant differences for GCA for number of panicles per plant (PN), amylose content, gelatinization temperature and head rice recovery. Highly significant differences were also observed for both SCA and REC for all evaluated characters. The results showed that the grain yield (GY), number of filled grains (FGN), 100-grain weight (HGW) and GC were controlled by non-additive gene action, while the inheritance of PN, AC, GT and HRR were largely controlled by additive gene effects, although non- additive genetic components and reciprocal effect were also involved, which suggest that a selection process could be done in the early generations. The two improved lines (RI18442-1 and RI18430-46) were found to be good general combiners for GY and FGN, while the best combiners for PN was Tarom Mohali and IR50 and for HGW was RI18430-46. The best combinations for GY were RI18430-46 × IR50, Tarom Mohali × RI18447-2 and Daylamani × RI18430-46. The good hybrids were Tarom Mohali × IR50, Line23 × RI18447-2 and Line23 × Backcross line for AC. Narrow sense heritability showed that the GY and GC had the lowest values while the other traits had either moderate or high heritability, which indicates selection in the early generations could be done to fix the favorable genes. In present study, narrow sense heritability was high for AC and moderate for GT, PN and HRR.
本研究旨在测定水稻籽粒产量、产量构成因素以及直链淀粉含量（AC）、糊化温度（GT）、胶稠度（GC）和整精米率（HRR）等部分品质性状的配合力与遗传力。研究首先基于完全双列杂交设计对选定水稻品种进行杂交，并在当季末收获F1代种子。在随后的生长季中，将正交组合、反交组合及亲本品系按随机完全区组设计种植，设置3次重复。方差分析结果表明，各基因型间所有性状均存在显著差异。采用Griffing法进行双列杂交分析表明，单株穗数（PN）、直链淀粉含量、糊化温度和整精米率的一般配合力（GCA）差异极显著。所有测定性状的特殊配合力（SCA）和反交效应（REC）亦均表现出极显著差异。结果表明，籽粒产量（GY）、实粒数（FGN）、百粒重（HGW）和胶稠度受非加性基因作用控制；而单株穗数、直链淀粉含量、糊化温度和整精米率的遗传则主要受加性基因效应控制，尽管非加性遗传成分和反交效应亦参与其中，这表明可在早期世代开展选择。两个改良系（RI18442-1和RI18430-46）被证实是籽粒产量和实粒数的优良一般配合力亲本，而单株穗数的最佳亲本为Tarom Mohali和IR50，百粒重的最佳亲本为RI18430-46。籽粒产量的最佳杂交组合为RI18430-46 × IR50、Tarom Mohali × RI18447-2和Daylamani × RI18430-46。直链淀粉含量表现优良的杂交组合为Tarom Mohali × IR50、Line23 × RI18447-2以及Line23 × 回交系。狭义遗传力分析显示，籽粒产量和胶稠度的数值最低，而其他性状则表现为中度或高度遗传力，表明可在早期世代进行选择以固定有利基因。在本研究中，直链淀粉含量的狭义遗传力较高，糊化温度、单株穗数和整精米率的狭义遗传力为中等。
Reference Key
mehrzad2015genetikacombining Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Allahgholipour Mehrzad;Farshdfar Ezatollah;Rabiei Babak
Journal Chemical biology & drug design
Year 2015
DOI
10.2298/GENSR1502559A
URL
http://www.doiserbia.nb.rs/img/doi/0534-0012/2015/0534-00121502559A.pdf
Keywords
grain yield heterosis combining ability ricegenetics

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