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本文报导了以棉花７５１为母本与鸡脚叶棉、乌干达棉、红叶棉、汉寿大桃、草棉等５个父本的混合花粉进行杂交。授粉后，观察了７５１大小孢子和雌雄配子体的发生、发育及其受精过程。切片观察表明在大小孢子的发生、发育与花蕾大小成正相关。大小孢子的发生在减数分裂前是不同步的，小孢子的发生早于大孢子发生１～２个时期。减数分裂后它们的发育逐渐趋向同步。开花时达到同步成熟。用多父本的混合花粉授粉，其受精过程仍为单精入卵。根据叶生长发育过程中早期出现鸡脚叶型性状，并由鸡脚叶逐渐转化为披针窄叶的特点，以及染色体观察，初步分析其受精过程可能是鸡脚叶的花粉亲和性高并最先进入胚囊，完成受精作用。其杂交后代经多代选育而成的Ａ型棉具有披针窄叶、棉铃外露、桃大铃重、现蕾早、分枝角度小等优良生物学性状。并从叶的形态演变过程再次表明个体发育是系统发育的重演。本文还对受精及其辐射性状等问题进行了分析。
This paper reports the hybridization of pollen with 5 male parents of cotton 751 as the female parent and chicken foot leaf cotton, Uganda cotton, red leaf cotton, Hansen big peach, cotton grass. After pollination, the occurrence, development and fertilization of 751 microspores and male and female gametophytes were observed. Slices of observation showed that in the occurrence of large and small spores, development and flower bud size is positively correlated. The occurrence of microspores is not synchronized before meiosis. The occurrence of microspores occurs earlier than that of megaspore for 1 ~ 2 periods. After meiosis their development gradually tends to synchronize. Flowering to achieve synchronous maturity. Polyploids polled with multiple paternal parents are still single-fertilized. According to the early emergence of chicken leaflet traits in the process of leaf growth and development, and gradually transformed from chicken feet into narrow lanceolate lamellae, as well as chromosome observation, preliminary analysis of the fertilization process may be the high pollen affinity of chicken feet First into the embryo sac, to complete the role of fertilization. The A-type cotton of its hybrid progeny, which has been selected from many generations, has the excellent biological characters of narrow-leafed lanceolate, boll-exposed, boll boll weight, early budding and small branching angle. And from the leaf morphological evolution process again shows that individual development is a phylogeny of repeat. This article also analyzes fertilization and its radiation traits and other issues.