不同种植期和不同环境下玉米的一些遗传参数

Kamal Ahmed Kazem, W. Hassan
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引用次数: 0

摘要

“为了评价引进玉米品种在不同播期和地点的表现,除地方品种外,还在两个地点进行了田间试验;该研究比较了从美国引进的5个玉米品种和一种当地合成品种(Ibba 5018),并在两个地点的3个播种日期(7月1日、15日和8月1日)对其进行了测试。采用RCBD随机完全区设计,4个重复,分块布置,主区包括3个播期,次区包括品种。研究了抽雄、吐丝天数、株高、穗高、叶数、叶面积、叶面积指数、株1穗数、穗长、行数、粒数、百粒重、总干物质重、生理成熟天数、作物生长率、单株产量和单株产量(吨h-1)等性状。结果表明,标准误差的值(SE)两个试验位置较低的研究特点和容许极限内除了叶面积在第一和第二高的日期巴格达位置和三个日期的迪亚拉事件,以及变异系数的值(CV)也低,在统计上可以接受的范围内,所有的特征研究的三个日期和两个位置。多数性状的遗传变异大于环境变异,2个地点和3个播期的表型变异系数接近遗传变异系数,表明性状受遗传支配。7月1日和7月15日,巴格达地点叶片面积及其指数、干物质质量、生理成熟天数的广义遗传率均高于90%(分别为96.6、97.4、93.4和94.4%)。9个性状的叶面积及其指数、生理成熟天数(94.7%、94.7%和93.4%)和1 ~ 8月;出丝天数、叶面积和叶面积指数、穗干物质数、成熟期天数、作物生长率和产量,植株和单位面积依次为(95.7、99.4、99.4、94、98.4、95.5、98.6、93.4、93.5%)。迪亚拉的叶面积、叶面积指数、生理成熟天数、植株产量、面积单位等性状的遗传力分别为92.3、92.3、98.7、73.6、73.6%、90.2、90.2、98.8、82.9、82.9%、90.9、90.9、86.4、80.7、80.7%,均优于最高遗传力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Some genetic parameter for maize under different planting dates and environments
"To evaluate the performance of introduced varieties of maize under different sowing dates and locations, in addition to local variety, a field experiment was carried out in two locations;. The study compared five varieties of maize introduced from America, with a local synthetic variety (Ibba 5018) and tested it in two locations at three sowing dates (1, 15 July and 1 August). The Randomized Complete Block Design RCBD was used with four replications, with spilt plot arrangements, the main plots included three sowing dates, the secondary plots included, the varieties. The traits of the days number to tassling and days to silking, plant height, ear height, number of leaves, leaves area, leaf area index, number of ears plant-1 , ear length, the number of rows ear-1, number of grains row-1 , number of grains of the plant, weight of 100 grains, total dry matter weight, the number of days to Physiological maturity, crop growth rate, individual plant yield and yield (tons h-1 ) were studied. The results showed that the values of the standard error (SE) in the two trial locations were low for the studied traits and within the acceptable limit except leaf area which was high in the first and second dates for the Baghdad location and for the three dates of the Diyala incident, as well as the values of the coefficient of variation (CV) were also low and within statistically acceptable limits and for all the traits studied in the three dates and for the two locations. Genetic variations were higher than the = environmental variation for most of the studied traits and the phenotypic coefficient of variation is close to the coefficient of genetic variation for the two locations and the three sowing dates, and this indicates that the traits are genetically governed. The value of heritability in a broad sense was higher than 90% at Baghdad location for first of July for the traits leaves area and its index, weight of the dry matter, number of days to physiological maturity (96.6, 97.4, 93.4 and 94.4%, respectively) and for 15 July for the traits. Leaf area and its index, and number of days to physiological maturity (94.7, 94.7 and 93.4%), and for I Aug for 9 traits; number of days silking, the leaf area and leaf area index, number of ears dry matter, days to maturity, rate of crop growth and yield the plant and unit area ((95.7, 99.4, 99.4, 94, 98.4, 95.5, 98.6, 93.4, 93.5%) Sequentially. As for Diyala, the traits of leaf area, leaf area index, number of days to physiological maturity, yield of plants, and area unit in the three dates were superior to the highest heritability (92.3, 92.3, 98.7, 73.6, 73.6%), (90.2, 90.2, 98.8, 82.9, 82 .9%), (90.9, 90.9, 86.4, 80.7, 80.7% respectively)."
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