GENETIC-ANALYSIS OF A PHOTOPERIOD RESPONSE GENE ON THE SHORT ARM OF CHROMOSOME 2(2H) OF HORDEUM-VULGARE (BARLEY)
GENETIC-ANALYSIS OF A PHOTOPERIOD RESPONSE GENE ON THE SHORT ARM OF CHROMOSOME 2(2H) OF HORDEUM-VULGARE (BARLEY)
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DOI：
10.1038/hdy.1994.85
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发表时间：
1994-06-01
期刊：
影响因子：
3.8
通讯作者：
SNAPE, JW
中科院分区：
文献类型：
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作者：
LAURIE, DA;PRATCHETT, N;SNAPE, JW
对来自冬春大麦杂交 (Igri x Triumph) 的 94 个双单倍体系进行 RFLP 作图，鉴定出大麦染色体 2(2H) 短臂上先前未描述的主要光周期响应位点 (Ppd-H1)。在温室实验中，在长日照条件下，带有 Igri 等位基因（冬季亲本）的品系提前 10 天开花。 Ppd-H1 基因座在田间实验中也有重大影响，差异为 12 天（春季播种）和 7 天（秋季播种）。 Ppd-H1基因座占春播开花时间遗传变异的60%，占秋播开花时间遗传变异的46%。 Ppd-H1 最可能的位置是 RFLP 位点 XMWG858 和 XpsrB9 之间 6 cM 的间隔，距离 XMWG858 近端 1 cM。 Ppd-H1的图谱位置表明它可能是小麦光周期响应基因Ppd1的同源等位基因。田间数据还表明，大麦 Ppd-H1 基因座对株高、生物量和产量组成具有高度显着的影响，这可能是开花时间变化的直接结果。同一染色体上的额外发育速率基因也显着影响开花时间和其他农艺性状。
RFLP mapping of 94 doubled haploid lines from a winter x spring barley cross (Igri x Triumph) identified a previously undescribed major photoperiod response locus (Ppd-H1) on the short arm of barley chromosome 2(2H). Lines with the Igri allele (winter parent) flowered 10 days earlier under long days in a glasshouse experiment. The Ppd-H1 locus also had a major effect in field experiments, giving differences of 12 days (spring sowing) and 7 days (autumn sowing). The Ppd-H1 locus accounted for 60 per cent of the genetic variation in flowering time in the spring sowing and 46 per cent in the autumn sowing. The most likely location of Ppd-H1 was in the 6 cM interval between the RFLP loci XMWG858 and XpsrB9, 1 cM proximal to XMWG858. The map position of Ppd-H1 suggests that it may be a homoeoallele of the wheat photoperiod response gene Ppd1. Field data also showed that the barley Ppd-H1 locus was associated with highly significant effects on plant height, biomass and yield components which were probably the direct results of the variation in flowering time. Flowering time and other agronomic characters were also significantly affected by an additional developmental!rate gene on the same chromosome.