Prolificacy assumes significance for development of high‐yielding baby corn hybrids. “Sikkim Primitive” is a native landrace of North‐Eastern Himalaya, and is the highest prolific maize germplasm. So far, the genetics of prolificacy in “Sikkim Primitive” has not been deciphered. Here, a prolific inbred (MGU‐SP‐101) developed from “Sikkim Primitive” was crossed with four non‐prolific inbreds viz., LM13, BML7, HKI161 and HKI1128. Six generations (P₁, P₂, F₁, F₂, BC₁P₁ and BC₁P₂) of the crosses were evaluated at two locations during rainy season 2018. MGU‐SP‐101 possessed 2.50–3.78 ears per plant compared to 1.06–1.86 among non‐prolific inbreds. The variation for ears was the highest in F₂s (1–8), followed by BC₁P₁ (1–7) and BC₁P₂ (1–5). The quantitative inheritance pattern of prolificacy with prevalence of non‐allelic interactions of duplicate epistasis type has been observed. Dominance × dominance effect was predominant over additive × additive and additive × dominance effects. Total number of major gene blocks ranged from 0.41 to 2.86, thereby suggesting the involvement of at least one major gene/QTL governing the prolificacy. This is the first report of genetic dissection of prolificacy in “Sikkim Primitive”.

中文翻译：

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“锡金原始人”多产的遗传分析—东北喜马拉雅山的多产玉米（Zea mays）地方品种

多产对高产婴儿玉米杂交种的开发具有重要意义。“锡金原始人”是喜马拉雅东北部的土生土长，是玉米多产的最高种质。到目前为止，“锡金原始语”中多产的遗传学还没有被破译。在这里，由“锡金原始人”开发的多产自交系（MGU-SP-101）与四个非多产自交系杂交，即LM13，BML7，HKI161和HKI1128。六代（P ₁，P ₂，F ₁，F ₂，BC ₁ P ₁和BC ₁ P ₂）在2018年的雨季期间，在两个地点对杂交进行了评估.MGU-SP-101的单株穗数为2.50-3.78耳，相比之下，非高产自交系的穗数为1.06-1.86。耳朵的变化在F ₂ s（1–8）中最高，其次是BC ₁ P ₁（1–7）和BC ₁ P ₂（1-5）。已经观察到多产的定量遗传模式与重复上位型的非等位基因相互作用的普遍性。优势×优势效应比加性×添加剂和加性×优势效应更为明显。主要基因块的总数在0.41至2.86之间，从而表明至少有一个主要基因/ QTL参与调控繁殖力。这是《锡金原始语》中多产的遗传解剖的首次报道。