3 Results 3.1 Phenotype comparison between the introgression line IL-2769 and the receptor parent DJY1 Phenotype analysis of the IL-2769 and DJY1 showed significant or highly significant differences in several traits, including panicle length, secondary branch number, sterile lemma length, grain length, grain width, 1000-grain weight, grain number per panicle, plant height, spikelet fertility, and primary branch number, but not in pollen fertility ( Table 1 ).
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A hybrid sterile locus leads to the linkage drag of interspecific hybrid progenies.
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