王晨冰　庞玉霞　牛茹萱　赵秀梅　王发林

摘要：在秦安县浅山半干旱区，以17年生桃品种京陇7号为试材，研究了不同地面覆盖方式对果实品质的影响。结果表明：不同地面覆盖方式对常温贮藏条件下桃果实硬度、Vc含量、可溶性固形物含量、可滴定酸含量、失重率以及腐烂率都有显著影响，其中全园覆麦草15 cm处理的桃果实常温下贮藏8 d 后果实硬度、Vc含量减幅最小，同时可滴定酸含量和果实腐烂率降幅最大;垄黑膜保墒集雨覆盖处理可溶性固形物含量变化较小，而对照处理（清耕）果实失重率最小。综合分析认为，全园地面覆麦草15 cm 的处理更有利于桃果实常温贮藏。

关键词：桃;覆盖方式;硬度;Vc含量;可溶性固形物含量;可滴定酸含量;失重率;腐烂率

中图分类号：S662.1        文献标志码：A        文章编号：1001-1463（2019）12-0021-04

doi：10.3969/j.issn.1001-1463.2019.12.005

Breeding of New Tomato Line 2019113 with Resistance to TYLCV

HU Zhifeng 1，2， SHAO Jingcheng 1，2， ZHANG Li 1，2

（1. Institute of Vegetable，Gansu Academy of Agricultural Sciences，Lanzhou Gansu 730070，China;2. Innovative Center for Storage and Processing Technology of Fruits an， Lanzhou Gansu 730070， China）

Abstract：A new tomato line 2019113 of pink fruit tomato with good comprehensive characters was bred by using the cultivars with resistance to TYLCV as the disease-resistant donor and the superior pink fruit cultivars as the recurrent parents after crossing and backcrossing， which combined with molecular marker assisted selection and four generations of field self crossing and separation selection. The fruit is round， the ripe fruit is pink and bright in color， the average single fruit quality is 160 g， the upper and lower fruits are uniform in size， and the storage and transportation are good. The genotype detected at the molecular level is Ty-2/Ty-2， which contains the ty-2 homozygous disease-resistant gene. There is no yellow curve leaf virus disease and leaf mildew resistance in the field， and the comprehensive characteristics are excellent.

Key words：Tomato;New Line 2019113;TYLCV;Breeding

秦安縣是甘肃桃集中产区，“秦安蜜桃”色艳味美，深受省内外消费者的喜爱。秦安县属我国黄土高原浅山干旱雨养农业区，果园生草、垄膜保墒集雨、果园覆草技术可改善土壤水热条件[1 ]、提高水分利用效率[2 ]。旱地果园垄膜保墒集雨旱作技术在甘肃中东部黄土高原旱作区的示范推广[3 ]，较大程度地解决了该区域季节性干旱和水分匮乏对果树生产限制的问题，桃果平均单果重增加13.8%以上、品质得到改善[4 - 5 ]，探讨和研究山旱地桃园不同地面覆盖方式下桃果实的贮运性对覆盖栽培技术的应用可以提供更进一步的理论支持。

1   材料和方法

1.1   试验区概况

试验于2017年在甘肃省天水市秦安县刘坪乡邓坪村进行。……